Operating Instructions
Contents
1. Put the carefully cleaned holder 60 on guiding pin Clamping plate 63 fixing screws 64 and adjusting screw 65 with stop 66 are already loosely in the holder Now slid chaser 70 into the holder and clamp it slightly with fixing screws 64 Take care that the chaser number corresponds to holder number Now swing the complete holder up to stop pin by which is retracted the feeler For vertical adjustment set dial gauge with the small hand wheel so that the feeler will touch the tip of the last cutting tooth As a matter of fact the feeler must never touch the guide teeth Now you may advance the chaser by means of adjusting screw 65 until the dial gauge reading will correspond with the setting value given by the relative setting chart as regards the theoretical setting value setting beyond or below centre see fig 8 Care should be taken that both of the small pointer for the millimetre graduation and the big pointer for the one hundredth reading are in accordance with the setting value If for example the chaser shall be set to the 1 75 setting value the small pointer should be between 1 and 2 and the big pointer should point at 75 Next to this the fixing screws 64 may be locked tightly but first tighten the frontal fixing screw in order to avoid tipping Moreover 15 advisable to retighten afterwards adjusting screw 65 If the chaser should be used up to such a degree that clamping plate 63 is inclined to tilt2. Thread Cutting Head Y WHK S3 C List of spare parts WAGNER thread cutting head WHK S3 with special locking collar Part no 74440300 pos piece part no description 1 1 70989000 excentric ring 2 1 70909000 pointer 3 1 02020004 screw M3x8 4 1 70995400 excentric casing 5 1 70990800 adjusting pinion 6 1 02882001 ball grease nipple 7 3 70990400 clamping screw 8 3 03021003 clamping nut 9 4 02015218 internal hexagonal screw M10X70 DIN912 10 1 70817400 guide ring 11 1 70834800 square nut 12 1 70834900 square nut counter nut 13 1 02048208 handless screw M8X25 DIN915 14 1 02882003 ball grease nipple 15 1 03011701 internal hexagonal screw M10X15 16 1 70817300 die stock head group complete 17 4 70808800 pressure bushing 18 4 03310356 pressure spring 2 5 X 13 5 X 60 0 19 4 02030157 shank screw 6X12 DIN 427 20 1 70997000 sliding key 21 2 02020209 countersunk machine srew M 8 X 20 DIN 63 22 1 02160071 adjusting spring 23 4 02040362 studs M 16 X 50 DIN 939 24 8 02061009 nuts M16 DIN 934 25 1 70991000 flange 26 4 70808700 bushing for holder bolts 27 4 70808600 holder bolts 28 4 02016260 internal hexagonal screw M12X40 DIN6912 29 4 70995100 holder guides 30 8 02121310 cylindrical pins 6 X 24 DIN 1474 31 4 02016257 internal hexagonal screw M 12X 25 32 1 77944700 co
3. ller GmbH 72124 2 EL LL REH ER eet Gem MSCIND t 4 d ee WAGNER WERKZEUGSYSTEME 2 M LLER GMBH M Hm 22 22 42 WAGNER WERKZEUGSYSTEME M LLER GMBH Gutenbergstra e 4 1 D 72124 Pliezhausen Telefon 07127 97 3300 Telefax 07127 97 3390 Email info wagner werkzeug de www wagner werkzeug de
4. 01 one VAL 50 24 020 004011 ELT SZ 0 SC ot 509 00 0 011 1619 SEO SE OLL 290 070 or oll Ge Sy 0 Sy OLl Bee 0s 0 04011 0685 4 390 SUME in 09 0 09011 9 0 syoll SUE 0 0 0 011 440 Ce S 0 SZ OLL TUE 08 0 08011 Eee 6415 580 8011 07706 060 06011 FE t 6 0 S6 0ll oer 001 00111 96 97 sol SO LLL Deck 19 1 2 OSI 6667 NIG apuimebiyoy orl 92421 sep UUOANIUAV uewjessur eBunjljeisui g uey WAGNER WERKZEUGSYSTEME M LLER GMBH e 21 WAGNER Thread Cutting Head Y WHK S3 A Setting table for thread cutting heads WHK S3 Holder WH 248 SG SG Ll 09 09 2 Se SHE SHELL SE 0 0 11 GE o G SL ELL roe 08 2 og ell er S8 S8 ELL SE 06 2 06 2 bats Get S6 ll a 00 00711 er so r um 01 01711 a SL YLL PO a 007 00711 HM 8 AT O r 260 SE y pe 19 LdN 1 2 OSI 6662 NIG epuiweBuuoy BETEN 70149 orl 91421 sep epuiweBuuoy euosiuoxrieuuy UHOMIUAA pewjeisur3 Hemjasug eBunjjersur3 Buy WAGNER WERKZEUGSY
5. Decimal degrees mm P t p i d2 min angles 4 minutes 41 h d h Pitch mm t p i d Effective diameter mm Helix Angle degrees WAGNER 15 WERKZEUGSYSTEME M LLER GMBH WAGNER Thread Cutting Head Y WHK S3 5 0 Faulty threads and their causes Faulty threads can have several causes 1 The sequence of chasers from 1 to 4 has not been observed This results in a completely miscut thread In case the chasers have been set in the reverse sense i e 4 3 2 1 no thread results at all 2 Chasers with different serial numbers may have been used Then the accurate offset of the four chasers is no longer guaranteed thus resulting in faulty threads 3 Chasers may have been mixed up e g itis impossible to cuta cylindrical thread with a chaser for taper threads 4 The wrong setting value or grinding angle may have been chosen This may result in a thin thread i e the included angle is too small and the gap in the root is too wide 5 Faults mentioned under items 1 to 4 were not made however the material to be cut requires different setting values respectively grinding angle and top rake values In the following a number of faults are listed in order to avoid faulty threads Fault Cause 1 The thread is not concentric The four chasers were not adjusted exactly to the same setting value e The setting value was too small The material was not concentric or sheared off bevell
6. avoids a return of the spindle sleeve if not the front position of the spindle sleeve have been reached before This security locking must also be active while setting up reaching the end position then the unlocking of the locking catch will be left undone By means of this a damaging of the chaser die head may occur For the application an control of the chaser die head you should take in band our dimension drawing 22 for WEK S8 respectively GSK 19 for WHK S3 First you have to clamp the adjustable trips the chaser die head must have this position where he is opening immediately afterwards the collar ball bearing touches the trips e g cutting procedure is finished the chasers have only to be swung out of the component Then both locking devices will be clamped an the guide bars under consideration of the dimension 50 m for WEK S8 respectively 53 mm for WHK S3 For opening the locking devices earlier than the chaser die head it is necessary to displace the roller accordingly All external Pipe Threads stated in holder table on page H1 can be cut A Cutting of taper pipe threads Cutting of taper pipe threads is effected in a continuous way According to the taper ofthe thread a taper cam ring chaser holders with taper sliding and taper chasers are required B Cutting of parallel pipe threads Cutting of parallel pipe threads is effected by a cylindrical cam ring and chasers for cylindrical threads WAGNER WE
7. chaser holders can be swivelled and taken off without loosening the holder guides 29 Before mounting them again it is necessary to clean and oil the sliding surfaces It is to observe that the pressure bushings 17 work perfectly The chaser holders are marked 1 to 4 on the front of place C The holders are to be used according to marking D To close the head use clamping ring 51 which presses the sliding pieces 62 and the head can be closed D Changing the chasers 1 Removal of chaser from holder For removing chaser 70 from holder 60 loosen the two fixing screws 61 then it is possible to remove the chaser by pushing it towards the cutting end It will be useful to place the chaser immediately into the adjusting attachment which is clamped in any vice or in the vice of the machine 2 Setting the dial gauge Replace stop pin by the relative setting gauge Then adjust the dial gauge in the following way Insert it into dial gauge holder and shift it axially until the small pointer of the dial gauge is precisely pointing at zero Now tighten clamping screw but take care that the movement of the feeler will not be hindered Then turn the dial of the gauge until the big pointer g will likewise precisely point at zero Having inserted again stop pin in place of the setting gauge the adjusting attachment is ready for setting the chasers WAGNER Thread Cutting Head Y WHK S3 3 Setting the chaser in the holder
8. during the tightening of fixing screws 64 then it will be indispensable to add shim 71 72 This shim is profiled like the chaser dove tail and can be supplied in various lengths A chaser set in this way is now ready for cutting and the holder may be taken from the setting attachment WAGNER WERKZEUGSYSTEME M LLER GMBH E Grinding the chasers The chasers being the real cutting tool of the whole thread cutting head system are supplied with a corresponding throat as already described in section a and b This throat will not be modified and will exist during the whole chaser life The chaser is reground on its front which is also the true rake This regrinding differs only little from the regrinding of conventional tools known There are only some points to be considered in particular which especially are determined fortangential chasers 1 Possibilities of grinding The regrinding of the chasers can be made on every universal tool machine As a help WAGNER supplies a grinding fixture which permits the clamping ofthe chasers as well as the setting of the necessary angles If no tool grinding machine is available we recommend to use a WAGNERQ chaser grinding machine As grinding wheels cone shaped cup grinding wheels EKW 60 Jot with strengthened edges suit best These wheels can be supplied by WAGNER 2 Selection of the rake angle The rake angle depends as in case of all cutting operations on the material to b
9. table for thread cutting heads WHK S3 Holder WH 218 228 e OC et 050 05011 gt 7 P 8787 660 55011 CG LV 090 09011 9y 690 69011 VD 7 gt Sc SV UL il n 070 0701 7 Ft GLO lt 7011 V9 cv 080 08011 7 GL LY 680 68011 67 6 wA ALA 060 06011 9G ZC G60 66011 oZ SE 001 00111 ZZ L ALL ale 74 sol SO LLL c CC LA 001 00111 08 8l wd G60 56011 vv 91 81 8 8 6 060 06011 LS 080 58011 S8 cl 080 08011 92 LL 6 70 lt 7011 00 OL 020 0 011 9 8 LAN L Z OSI 6662 NIG epuiweBuuoy 91497 ovi 91491 SepuiMac YHOMHUM HEmjaysug oBunjjagsug WAGNER WERKZEUGSYSTEME M LLER GMBH e 20 WAGNER Thread Cutting Head Type WHK S3 Holder WH 238 A Setting table for thread cutting heads WHK S3 c amp 0l Sy 99 08 601 98 19 8 601 96 19 06601 9 99 G6 601 0 99 00 00011 SC So o S0 OLL SC OL O 0
10. the chasers are ground straight on their face with the adjusted angles Grinding with guide tooth See fig 6 and 7 right Here the grinding consists of two phases of operation Grinding of the Guide Foot 2 Guide Teeth It is recommendable that the guide tooth juts out as less as possible 5 to 10 of the thread 2 against the cutting teeth As grinding angle the holder angle is adjusted and as rake angle a value between 0 and the selected rake angle is adjusted This in not too important as the guide teeth do not cut but lay beyond the centre of the work piece and do only guide Grinding of the Cutting Teeth The angles selected respect tively determined of page 7 and page 8 are now adjusted exactly The cutting teeth are ground in a sharp edged way between the first and the second complete cutting tooth The sharp edged execution of the corner is most important as if the flank of the first tooth is ground chips can gather and this will lead to a breaking out of this tooth and also to a production of unclean threads Jutting out of the guide tooth Guide teeth that are too long can also result in gathering of chips and as the guide teeth are laying too far beyond the centre line of the work piece small thread diameters cannot be adjusted Too short guide teeth do not guide enough If you work with a lead screw feed it is not absolutely necessary to use guide teeth WAGNER Thread Cutting Head Y WHK S3 Fi
11. upon the relative cutting speed The example outlined shows d220mm n 64 min gt 4 WAGNER WERKZEUGSYSTEME M LLER GMBH 2 Calculating the helix angle Usually it is not necessary to know the helix of a thread because the threads are listed in the holder chart in such a way that the holder corresponding to each thread may be read anyway However for special cases that are not listed in the holder chart you may quickly calculate the pitch angle of the thread by taking recourse to page 16 In doing so take care that the diameter to be applied to the thread in question should not be the outside diameter but the medium diameter i e d t d3 42 2 42 medium diameter d outside diameter 43 core diameter Helix angle is calculated according to the relation 229 tg 9 x d2 P pitch of the thread mm d2 medium diameter or flank diameter respect The left side of the GSL 52 nomogram contains the P scale in the middle is the d scale and on the right side scale For the latter the angle on the left side is given in centigrade while on the right side can be read in degrees and minutes After all you look up the pitch of the desired thread on the P scale and the medium diameter on the d2 scale Connect the two points by a straight line and you will hit upon the relative helix angle on the oi scale The example outlined in the chart shows the cal
12. 0 30 10 02 110 25 0 25 4 8 10 42 110 20 0 20 R4 10 81 110 15 0 15 11 20 110 10 0 10 11 59 110 05 0 05 11 98 110 00 0 00 WAGNER 23 WERKZEUGSYSTEME M LLER GMBH WAGNER Thread Cutting Head Type WHK S3 B Holder Table for thread cutting head WHK S3 Bey amp 011 66 W v080rZ S LXOLL G6 W 011 06 001XZ LXGZ 490 aSZHM 6 c 22 8858 8 808 8 9 5 20807 2 088 79 5 2 70 18 99 OOLXZLXGZ 2520 ayZHM YL LX E a EXBISIVITIW Z08074 SES Sm 1 2 X09 89 9966 W 19 v 001XZ LXGZ 460 JEZHM VIL CL Al 1 21 8 1 B EL vost X Os 8v Sy Cr W 10807 67 11 1 811 al CX 9ESETEEECEW 87 87 001XC IS 801 8CCHM LZ 64 91 LX LM ZL 8 1 1 8 2 We 91 491 Xa LM v E vL 1 18 6 En E ZX 87 LZ9T ST VS EZ W 0080rZ 11 54 AE pee yog iE S LXZZ1ZOZ6U8LW 06 01 001XZ LXGZ 2081 alZHM 6 91 1dN JINN 6662 6SZ NIG 615 915 ww u o ON PNPOAG edid JN edid lt 9v0 2105 uorsueuuiq uoyouBbiseq HAPUOD 8945 HRZ sppa y YHOMUU MA Sul 1149W 1 5045 WAGNER WERKZEUGSYSTEME M LLER GMBH e 24 WAGNER
13. 63 4 5 plate 64 8 02015209 internal hexagonal screw 10 25 DIN 912 65 4 70511700 adjusting screw 66 4 70511800 stop 67 4 02121360 grooves pin 8x24 68 1 02677005 hexagonal secket head wrench 5 DIN 911 69 1 02677007 hexagonal secket head wrench 8 DIN 911 71 4 70807800 shim 16X8X20 72 4 73165700 shim 16X8X45 70 4 chasers please give us the holder type Adjusting device Part no 77063900 10 E1 1 77924500 carrier adjusting device WGK WHK 20 2 02044204 grub screw DIN553 M 8x8 30 E2 77925600 guiding pin WGK WHKK 40 E7 1 77924700 dial gauge holder WDK WKK 50 1 02160041 feather key DIN6885 FORM A 5x5x25 60 EA 1 70259000 knurled head screw ZR16 22 M5 RD 8x11 70 1 77924800 screw WJK WKKK M 10x65 80 1 77924900 washer WJK WKKK RD 34 8 2x3 90 2 02020055 countersink screw M 4x10 DIN63 100 E8 1 77925000 thumb wheel WJK WKKK RD 34 8x8 110 1 02116266 split pin 4x32 DIN 1481 120 1 77925100 stop pin WDK WKKK 130 E5 1 77925700 setting gauge WDK WEKK RD 14x65 DIN 140 1 06525022 caliper for dial gauge M2 5 E6 1 06525003 dial gauge WAGNER 26 WERKZEUGSYSTEME M LLER GMBH WAGNER Thread Cutting Head Y WHK S3 D Drawing of WHK S3 744 403 00 3 vam n EI E B M ller GmbH 7174 Term N Sate eu Asim Leg Terma p gy ER N 1 4 7 i P VI 27 WERKZEU
14. From turning the reader is used to obtain precise Information on the cutting speed with respect to using various materials and tools In thread cutting such an Information is not possible because the cutting speed depends on too large a number of factors e g on the material on diameter depth of thread pitch setting measure top rake grinding angle and last not least on the desired cleanness of the thread flanks Therefore the following chart is just a trial to give approximate guidelines Starting with them it should be possible to try out the cutting speed for each individual case The first column of the chart contains a few materials only Not listed materials should be ranged between such which were listed The second column gives speed data for cutting angular threads For this please bear in mind that the lower cutting speed refers to the larger diameter while the higher cutting speed should be applied to smaller diameters For fine threads the following may serve as a rule of thumb Look up standard threads and find out that thread which has the same pitch as should have the fine thread you intend to cut and select the same cutting speed that would be favourable for the normal angular thread In the third column Acme threads is likewise given a speed range which should be applied in accordance with he work piece diameter the smaller the diameter the greater the cutting speed WAGNER Thread Cutting Head Y WHK
15. GSYSTEME WAGNER Thread Cutting Head Y WHK S3 E Drawing of chaser holder 740 800 00 tol Ma e n DIN 150 2768 m Y N D C a Mafe k rzeren Schenkei 0 4550 m pa 10 50 170 400 rt Ch emile 5j Form wg Lageteleranz nan DIN 150 7765 X Metr 150 jnne nert fecht en E D 18 Orig DINA4 d mel MC IN ARBEIT ER Zeichnungsnummer 74080000 STREHLERHALTER AGER BL 1 ind Mr Datum Name ee bergstra e 1 k A M ller GmbH 72124 Pliezhausen WAGNER 28 WERKZEUGSYSTEME M LLER GMBH VAGNER Thread Cutting Head Type WHK S3 big pointer holder clamping plate fixing screws M 10x 25 chaser holder chaser carrier for adjusting device chaser hand wheel big ber adjusting screw clamping rin chaser holder no Setting device with setting gauge Grinding fixture for chasers WAGNER WERKZEUGSYSTEME M LLER GMBH WAGNER Thread Cutting Head Y WHK S3 G Hanging up instruction For mounting the die head the screw 61 has to be removed so that the ring screw 0 20330 02 can be inserted mounting of ring screw M10 no 0 20330 02 30 WERKZEUGSYSTEME M LLER GMBH Ba H Application of die head WHK S3 31 WAGNER Thread Cutting Head Y WHK S3 M
16. Operating Instructions Thread Cutting Head YreWHK S3 with roller bearing and brake 744 403 00 WERKZEUGSYSTEME M LLER GMBH Table of contents 1 0 2 0 3 0 4 0 5 0 6 0 7 0 Principle of die head operation Application of die head A Cutting of taper pipe threads B Cutting of parallel pipe threads Handling of die head A Co operation ofthe head components B Inscription of the chasers and the head C Changing the holders D Changing the chasers E Grinding of the chasers Setting the chasers Thread cutting A Setting of the thread diameter B Selecting the cutting speed C Coolant and lubricant D Nomogram for determination of cutting speed E Nomogram for determination of helix angle Faulty threads and their causes Instructions for the use of the Setting table Instruction for using the table of chaser holders 8 0 Attachments A Setting table for thread cutting heads WHK S3 B Holder Table C List of Spare Parts D Drawing of WHK S3 744 403 00 E Drawing of the chaser holder 740 800 00 F Adjusting device G Hanging up instruction H Application of die head WHK S3 WAGNER Thread Cutting Head WHK S3 WAGNER WERKZEUGSYSTEME M LLER GMBH WAGNER Thread Cutting Head Y WHK S3 1 0 Principle of die head operation The die head operates with four tangential chasers In order to have a large working range and to adapt the chasers t
17. R10 14x3 Chasers for trapezoidal threads as per DIN 103 ISO with a diameter of 10 to 14 mm and a pitch of 3 mm The holders can only be used in sets and cannot be exchanged against those of other sets The production number is marked with A e g A 6 letters and numbers between 1 and 100 Underneath is the holder type e g WE 21 B or WH 21 B The holders of a set are marked with the numbers 1 to 4 and C fig 2 As all holders are adapted to the guides besides each bolt on place D is the number to 4 The range of holders can be looked up in the holder table Despite this on the front of holder 1 in place E under the holder type the range of the minor diameter i e 8 28 is specified In addition the holder angle is marked VAGNER Thread Cutting Head WHK S3 Fig 2 Inscription of the Chasers Set Number Number of Thread Form Chaser Pitch f here a production number is engraved only chasers with the same number in one set have to be used Fig 3 Chaser Angles Clearance Angle y Rake Angle Lip Angle 6 Cutting Angle WAGNER WERKZEUGSYSTEME M LLER GMBH Changing the holders To change the holders first you have to remove the security trip see GSK 22 for WEK S8 respectively GSK 19 for WHK S3 then it is necessary to turn the cam ring so that the sliding key under the eccentric cam freely move The base ring hasto be moved backward so that the
18. RKZEUGSYSTEME M LLER GMBH 3 0 Handling of die head A Co operation of the head components The die head consists of four basic components 1 Die stock Die stock 16 is fastened with four studs 23 and nuts 24 to the headstock spindle of the Thread Cutting Machine with the nuts being accessible behind the spindle flange On its face side it bears the hardened die stock plate with internal hexagon screws 28 This takes the holder bolts 27 on which are mounted the chaser holders The holders are guided in holder guides 29 which should not be screwed off without reason Pressure bushes 17 by means of springs 18 press the holders to the exterior Their movement is limited by bolts 19 The feather key 20 fitted an the die stock serves for preventing the die stock ring from distortion and receives the contact pressure of the brake 2 Die stock ring The eccentric casing 4 with eccentric ring 1 inserted is connected to guide ring 10 by means of the four internal hexagon screw 9 This unit is called die stock ring The guide ring being guided along the feather key 20 the die stock ring can only be shifted axially an the die stock In the eccentric casing the eccentric ring is clamped with clamping screw 7 and tension nut 8 When this clamping is released the eccentric ring may be displaced towards the die stock ring by turning adjusting pinien 5 by which is obtained a change in diameter 3 Hold
19. S3 Material Cutting Speeds m min Free cutting steels 15 40 Structural steels up to 500 N mm 10 40 Structural steels gt 500 N mm 5 15 High alloyed steels stainless 3 8 Tubes 15 40 Malleable iron fittings 10 30 Gray cast 10 25 MS 58 30 60 MS 60 62 30 50 Bronze 20 50 Copper 15 40 Aluminium alloys 20 60 For threads on pipes and fittings there is no large choice of materials Here the cutting speed is ranging from 10 to 20 m min However where it is permissible to let the pipe project from the vice by a greater length so that it sings during the cutting operation it will be possible to reach cutting speeds between 30 and 40 m min Even in dry cutting However the flank of the thread is no longer clean One may say on principle that an improved surface quality will always be bought at the price of a reduced cutting speed The proper cutting speed for each case has to be found bytrial On the usage of page 12 cutting speed chart The left hand scale D is graduated on one side in millimetres and an the other side in inches Outside diameters and finally further to the right there are the outside diameters for Whitworth pipe threads The scale in the middle indicates the speeds it is recommended to mark the possible speeds of the machine in nomograms and on the right side is the scale for the cutting speeds to be calculated When drawing a straight line from the desired diameter through the desired speed you will hit
20. STEME M LLER GMBH 22 A Setting table for thread cutting heads WHK S3 Holder 258 WAGNER Thread Cutting Head Y WHK S3 Kern Einstelll nge Einstellwert Einstellwert Einstellwert Whitworth Amerikanische Rohrgewinde des Gewindes Lehre 149 Lehre Lehre Rohrgewinde 88 35 DIN 2999 ISO 7 1 NPT API 89 02 112 35 2 35 89 67 112 30 2 30 90 32 112 25 2 25 90 95 112 20 2 20 91 56 112 15 2 15 92 17 112 10 2 10 92 77 112 05 2 05 93 36 112 00 2 00 93 94 111 95 1 95 94 51 111 90 1 90 95 07 111 85 1 85 95 62 111 80 1 80 96 17 111 75 1 75 96 71 111 70 70 97 24 111 65 1 65 97 77 111 60 1 60 R 31 98 29 111 55 1 55 98 80 111 50 1 50 99 30 111 45 1 45 99 80 111 40 1 40 00 30 111 35 1 35 00 79 111 30 1 30 0127 111 25 1 25 01 75 111 20 1 20 02 22 111 15 15 02 69 111 10 1 10 03 15 111 05 05 03 61 111 00 1 00 04 07 110 95 0 95 04 52 110 90 0 90 104 96 110 85 0 85 05 40 110 80 0 80 05 84 110 75 0 75 06 28 110 70 0 70 06 71 110 65 0 65 07 13 110 60 0 60 107 55 110 55 0 55 07 97 110 50 0 50 08 39 110 45 0 45 08 80 110 40 0 40 09 21 110 35 0 35 09 61 110 30
21. culation of the helix angle for M 16 thread The mean diameter is 4 d 16 13 402 2 14 701 mm Pitch diameter likewise 14 701 mm Pitch P 2 mm Connecting line P d2 gives a helix angle of 2 49 or 2 29 In view of the fact that the medium diameter only deviates very slightly from the flank diameter it is permissible in most cases to calculate with the flank diameter WAGNER Thread Cutting Head Y WHK S3 C Coolant and lubricant In principle when thread cutting we work with cooling lubricants A good supply of cooling lubricants is necessary Our recommendation degree of greasiness approx 8 12 96 Diluted soluble oil can be used However cutting oil can lead to a considerable improvement of the cutting process and of the thread Gut There is the risk that parts could bind when using synthetic cooling emulsion In this case function of the thread cutting head is reduced In special cases we recommend to cooperate with the manufacturing company WAGNER WERKZEUGSYSTEME M LLER GMBH WAGNER Thread Cutting Head Y WHK S3 D Nomogram for determination of cutting speed mm d inches B S P 100 90 80 70 60 1000 d Major diameter mm in 5 n 1 min v Cutting Speed m min WAGNER 14 WERKZEUGSYSTEME M LLER GMBH WAGNER Thread Cutting Head Y WHK S3 E Nomogram for determination of helix angle
22. der Angle Supplementary Angle In order to determine the supplementary angle for other rake angle values and special throats the nomogram in fig 4 can be used as follows To look for the throat or for the corresponding throat angle on the right scale make a straight line from this point across the corresponding rake angle on the medium scale to the left scale There the supplementary angle can be read In special cases when cylindrical threads without guide teeth are cut the supplementary angle is not necessary Then itfollows Grinding Angle Holder Angle When cutting conical threads on the width of the chaser which is effected without guide teeth also a supplementary angle has to be used which compensates the conical form of the chaser so that the whole cutting edge is again parallel to the axis of the work piece This supplementary angle amounts to 1 in case of a thread with cone 1 16 1 When cutting conical threads with continuously opening thread cutting heads type Z K Z GK and GEWE generally chasers with guide teeth are used In special cases e g high cutting speeds and in case of a formation of built up edges chasers without guide teeth can bring an improvement WAGNER WERKZEUGSYSTEME M LLER GMBH WAGNER Thread Cutting Head Y WHK S3 Fig 4 Nomogram for Determination of Supplementary Angle Top Rake 4 gt j Supplementary Angle Standard Throats 4 Checking the grinding a
23. e cut on the possibilities of lubricant and of coolant and on the cutting speed Standard Time Data Material Rake Angle Free cutting steels 16 25 Structural steels up to 500 N mm 16 25 Structural steels gt 500 N mm 16 25 High alloyed steels stainless 22 30 Tubes 20 25 Malleable iron fittings 15 22 Gray cast 10 20 MS 58 4 10 MS 60 62 8 20 Bronze 8 20 Copper 20 30 Aluminium alloys 18 30 In special cases e g when working with steels with low resistance St 37 and similar steels stainless materials copper and aluminium it may be better not to grind the true rake on a plain face but to provide it with a radius so called flute which essentially favours the outlet of the chips in case of these materials WAGNER Thread Cutting Head Y WHK S3 3 Layout of the grinding angle The grinding angle is in a certain angle to the thread profile and compensates the holder angle the throat bevel as well as the rake angle in such a way that the cutting edge again runs in a parallel relation to the axis of the work piece and thus an accurate thread profile can be cut Accordingly the grinding angle consists of holder angle and a supplementary angle For the most usual rake angles of 20 and 25 the supplementary angle for angular threads can be taken from the following table for normal throats Grinding Angle Throat 20 25 long 3 0 3 8 medium 3 59 4 59 short 5 0 6 5 Grinding Angle Hol
24. e work piece Chaser with short throat Chaser with medium throat 2 2 33 2 4 mm Chaser with long throat 15 d 8 5 mm MN T 18 15 M2 0PQ 1 Standard tool rake angle 20 M1PQ1 u elle tool rake angle 25 M1 5PQ1 tool rake angle 5 pe Grinding angle 7 Grinding angle 5 athe Grinding angle 2 WAGNER WERKZEUGSYSTEME M LLER GMBH B Inscription of the chasers and the head The thread form the pitch and the number of the chasers within the set are engraved If on the position a production number is engraved only chasers with the same number in one set have to be used Examples for the Designation of the Thread at the Chaser M2 0P Chasers for all metric threads as per valid DIN 13 with a pitch of 2 0 mm W11GG Chasers for all Whitworth threads as per DIN 11 and for all cylindrical Whitworth pipe threads as per DIN 259 with a pitch of 11 threads per Inch R11 GGK1 16AOV Chasers for conical Whitworth pipe threads with cone 1 16 as per DIN 2999 and 3858 with a pitch of 11 threads per Inch for conical thread cutting on chaser width i e without device R11 GGK1 16A Chasers for conical Whitworth pipe threads with cone 1 16 as per DIN 2999 and 3858 with a pitch of 11 threads per Inch for continuously conical thread cutting i e with device T
25. ed and the cutting Speed was too low The top rake was too large Length f of guide teeth in front of the working face was too short e Alignment of work piece and thread cutting head is not accurate enough 2 Faulty lead The lead angle of the chaser holder is incorrect To be compared with thread and holder tables whether the correct holder was chosen for the thread to be cut e The grinding angle is incorrect The setting value is incorrect The slide of the machine offers too much resistance or the feed rate is not correct e The feed pressure is not correct in relation to the lead 3 Wrong included angel Chaser was Set in the holder tilted e Churping plate and position of chaser to be checked 4 Thread depth is too small The grinding angle is too small or even negative The setting value is too small WAGNER 1 6 WERKZEUGSYSTEME M LLER GMBH 5 Threads are of poor quality surfaces are rough 6 Continuous flutes alongside of the thread flanks 7 Chatter marks on the thread 8 Thread is eccentric to shank 9 A multi start thread is obtained 10 Chasers break out WAGNER Thread Cutting Head Y WHK S3 These faults can be due to the formation of a built up edge which is often caused by selecting the top rake too low Chaser is blunt Cutting speed is too high Coolant resp lubricant chosen is unsuitable Offset fault to be checked Do bear chasers and ho
26. ers Holders 60 taking the chasers are mounted an holder bolts 27 and are locked axially by the holder guides fastened to the die stock plate For receiving pressure they bear an the eccentric ring together with WAGNER Thread Cutting Head Y WHK S3 the slinding pieces 62 If the die stock ring was pushed back far enough they are swung out of the holders guides and removed from the head without loosening the holder guides 4 Roller bearing ring The exterior ring 42 is for axial movement of base ring 5 Chaser holders The chasers have a parallel thread profile i e threads which have not the same diameter but the same pitch can be cut with a set of chasers e g M 6 and M 12 x 1 where of course according to the different helix angles and diameters two different holder types have to be used Throat long For work pieces in milled material or with oversize run out of thread approx 4 x pitch Throat medium For work pieces without oversize blank or pre worked parts run out of thread approx 3 x pitch Throat short For work pieces with threads against shoulder run out of thread approx 2x pitch In exceptional cases for materials with larger oversize a throat can be supplied with two throat bevels The longer the throat the better the thread surface and the longer the chaser life When choosing the throat however it must be absolutely considered that the chasers with their side faces do not contact th
27. find on the right hand side a column called setting values where the setting value using the appropriate gauge is listed The listed setting values are always positive values according to the adjusting gauge diameter stated on top ofthe setting value column A setting according these table values means that the cutting edge of the threads cuts exactly on the centreline of the work piece In practice it has been shown that the value has to be suited to the different materials The following data may serve merely as guidelines because other factors like for instance centreline accuracy between cutting head and work piece clearance of slide and shaft have a bearing on the setting value The setting value has to be increased by the determined value from the following table 10 WAGNER Thread Cutting Head Y WHK S3 Fig 8 Setting of the Chasers Rake Angle utting Angle a Clearance Angle Lip Angle negative Cutting Edge Above Center Fig 9 Setting Value and Setting Length on the Chaser Chasers Points of Contact Holder Pin Setting Length Work Pieces WAGNER WERKZEUGSYSTEME M LLER GMBH Material form of the Addition in work piece of the diameter of the work piece Free cutting steels 1 2 Structural steels up to 500 N mm 1 Structural steels more than 500 N mm 0 5 1 High alloyed steels stainless 0 0 5 Tubes cylindric threads 0 5 2 T
28. g 6 Cutting Faces on the Chaser Grinding without Guide Tooth Cutting Face Throat Grinding with Guide Tooth Cutting Face PE ce Throat Fig 7 Chaser Forms for Thread Cutting without Guide Tooth Teeth n ea x te CG llth III IN LAT Guide with Guide Y V FH WAGNER WERKZEUGSYSTEME M LLER GMBH Setting the chasers To ensure that the chasers are uniformely set in the correct relationship to the work piece they are adjusted in a setting device by means of a dial indicator This setting is comparable to the setting of the lathe tool on the center height The corresponding values can be obtained from the setting table Determination ofthe setting value The setting value results from the setting length which is the gauge from the centre of the holder to the point of contact at the core diameter of the thread The setting value so depends on the core diameter of the thread and varies according to the diameter To ease the setting process these setting lengths were converted into setting values which can be obtained from the holder tables By using the adjusting device the values are transmitted onto the chasers In order to determine the setting value of the thread you wish to cut you have to look for it in the holder table There you will
29. lders have the same serial number Guide tooth does not begin exactly with tooth space The side of the first tooth of the guide tooth must not be ground Chaser broken or blunt Setting value is too small Cutting speed is too high Too long clamped in the clamping vice Top rake was too small for soft material Work piece is clamped eccentrically The work piece centre is not centrical to the centre of the thread cutting head The chasers were not mounted in the correct sequence Heavy feed pressure may result in the production of multi start threads when cutting fine threads of a comparatively large diameter the chasers will then continue automatically to cut these multi start threads Too much oversize The material is not concentric or sheared off The setting value chosen is too small The cutting speed is too low WAGNER WERKZEUGSYSTEME M LLER GMBH To ensure that the chasers are uniformly set in the correct relationship to the work piece they are adjusted in a setting jig equipped with a dial indicator An accuracy of a few hundredths of a millimetre may be considered adequate The desired values can be obtained from the setting table to an accuracy of 0 05 mm The top row lists a large variety of customary threads Since the setting value depends an the core diameter minor thread diameter this is listed in the first column The second column gives the setting length This is value C 6 from fig 3 on page 29 plu
30. ngle with the setting device The grinding angle can always be controlled in the setting device The cutting edge of the chaser should be parallel to the measuring pin of the dial gauge and the measuring pin is parallel to the axis of the work piece Cutting Angle 3 Example Angle of Throat 18 medium Top Rake 15 Results to Supplementary Angle 2 6 Angle of Throat In practice it has been shown that for most materials this parallel position of the cutting edge of the chaser to the axis of the work piece gives the best results In some cases for instance for stainless materials it may be necessary to reduce the grinding angle sometimes even to the negative domain whereas an increase is not recommended dial gauge cutting teeth parallel Fig 5 Checking the Grinding Angle with the Setting Device cutting angle too low cutting angle too high WAGNER WERKZEUGSYSTEME M LLER GMBH 5 Grinding ofthe chasers After selecting the necessary angles according to page 7 and page 8 the chasers can be ground In case of dry grinding you have to pay attention to a moderate temperature ofthe chasers On no account the chasers must be immersed in water later When grinding wet a sufficient amount of coolant has to be used Mistakes may lead to appearance of hairline cracks and to breaking out of the chaser cutting edges Grinding without guide tooth In fig 6 and 7 on the left f is absent i e
31. o the screw pitch as closely as possible there are various Sets of chaser holders which are interchangeable Via cylindrical holder sliding pieces in the form steps the cutting pressure is transmitted to the eccentric ring As soon as the thread length is reached the latter slides from the step so that the die head is opened reverse traverse may take place without any difficulties These is to wind that a security trip is provided see drawing GSK 22 for WEK S8 respectively drawing GSK 19 for WHK S3 at the working spindle an which the chaser die head is mounted This security trip avoids a complete re sliding of the die stock ring and is only to be removed for changing of the holders This die head has been used successfully in hard working conditions WAGNER 2 WERKZEUGSYSTEME M LLER GMBH 2 0 Application of die head The die head is supplied in special execution for automatic pipe cutting machines Due to the Operation method the die head with the working spindle has to be axially moved to be machined As the movement of the die head is axial the operations closing thread cutting and opening are effected by stops These adjustable stops mounted on stationary guide bars control the die head through the closing ring located by roller bearing rings The head is equipped with a brake and two pawl devices to avoid an undesired opening ofthe head It is necessary that the machine is having an electrical locking which
32. of the diameter But it must be remembered that the cutting temperature is always increased if the chaser is threading beyond the centre line of the work piece as in this setting the chaser presses in the flanks The setting value should therefore not be increased more than absolutely necessary to produce the desired clean threads WAGNER WERKZEUGSYSTEME M LLER GMBH WAGNER Thread Cutting Head Y WHK S3 7 0 Instructions for using the table of chaser holders The table of chaser holders enables the user to select the suitable holder in accordance to his requirements This avoids time consuming enquiries The head of the table contains a large number of standard threads which include not only German threads but also English and American types American pipe threads appear under the description NPT The first column lists all normal chaser holders which can be supplied for any particular thread cutting head The second column lists the holder angle following a column giving the dimensions of the chaser In this last column the first two figures refer to the cross section of the chaser and the last figure to the length of a new chaser Re grinding will of course reduce this length The minimum and maximum core diameters which can be cut with any given holder is listed in the fifth column WAGNER 1 9 WERKZEUGSYSTEME M LLER GMBH WAGNER Thread Cutting Head WHK S3 8 0 Attachments A Setting
33. s the setting value from the third column of the setting table under the condition that the chaser is placed exactly at the centre of the work piece as shown in fig 6 To determine the setting value of a thread not listed in these tables it is merely necessary to know the core diameter This core diameter should be interpolated in the appropriate position in the first column the setting length and the setting value will then be found in adjacent positions in the second and third columns respectively 6 0 Instructions for the use of the setting table WAGNER Thread Cutting Head Y WHK S3 The values thus obtained provide a setting in which the cutting edge of the chaser is accurately positioned along the centreline of the work piece However this setting does not always result in the production of good threads It will often be necessary to select a larger setting value see fig 8 Especially when cutting soft material it is necessary to place the cutting edge beyond the centre line of the work piece i e to increase the setting value if for example no normal threads are obtained or the flanks are very unclean when cutting with the normal setting value It is recommended to try whether an increase of the setting value by 1 96 of the diameter has already good cutting results If not the chaser has to be adjusted further Depending on the type of thread the setting value had to be increased occasionally up to 3
34. ubes conical threads 1 2 Gray and malleable cast 1 2 MS 58 2 MS 63 Bronze 0 5 2 Copper 0 5 1 Aluminium alloys 0 5 1 Example Thread M 10x 1 Material 9 S 20 K Setting value from holder table 0 60 1 596 von 10 0 15 Setting of the Chasers 0 75 The chasers must not be increased more than absolutely necessary that means until chatter marks are no more visible on the thread An over increase of the threads leads to a greater friction between tool and work piece which causes an increase of temperature and bigger abrasion VAGNER Thread Cutting Head Y WHK S3 WAGNER WERKZEUGSYSTEME M LLER GMBH 4 0 Thread cutting A Setting of the thread diameter The diameter of the thread to be cut is set by turning of the eccentric ring 1 Setting is continuous Setting is effected with die head closed according to a thread sample or a bolt corresponding to the core diameter To adjust the diameter it is necessary to loosen clamping screws 7 being situated on the front side by means ofthe square socket wrench 52 Then the adjusting pinion 5 is turned until it will no longer be possible to turn the thread sample manually Afterwards the clamping screws 7 are retightened A possible readjustment would be necessary alter having checked the first thread being cut Scale f only serves for finding a once made out position ofthe eccentric ring again Selecting the cutting speed 1 Choice of cutting speed
35. ver ring 33 4 02043256 handless screw M 12X12 DIN 551 34 8 02043206 handless screw M 10X12 DIN 551 35 1 77941800 threaded bushing 36 1 77942300 pressure screw 37 1 78002800 bolt for spring 38 5 02320111 cup spring 39 1 02112156 cylindrical pin M X 8 DIN 7 40 1 78054500 ball bearing 41 1 77944300 internal ring of ball 42 1 74436800 external ring of ball 43 1 77944400 ring of ball 44 1 77944600 cage of ball 45 60 02460135 ball 46 12 02015110 internal hexagonal screw M6X30 DIN912 47 1 02882001 ball grease nipple DIN71412 WAGNER 25 WERKZEUGSYSTEME M LLER GMBH VAGNER Thread Cutting Head we WHK S3 C List of spare parts cont WAGNER thread cutting head WHK S3 with special locking collar Part no 74440300 pos piece part no description accessories head 50 1 03889003 pressure lubricator 51 1 70997100 clamping ring 52 1 02675005 hexagonal secket head wrench 53 1 03697006 hexagonal secket head wrench 8 DIN 6911 54 1 03697007 hexagonal secket head wrench 10 DIN 6911 55 3 02048265 handless screw M10X55 DIN915 80 1 02033002 mounting ring screw M10 DIN 580 81 1 73949200 82 1 02015259 internal hexagonal screw M 12X 25 DIN912 83 1 02015221 internal hexagonal screw M 10X 90 DIN912 60 4 chaser holders 61 4 02016054 internal hexagonal screw M 5X 16 DIN 6912 62 4 sliding pad
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