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1. Hex HD Cap Screw Hex HD Cap Screw Soc HD Set Screw Soc HD Set Screw SINGLE STRAND SPROCKETS ANSI Standard Roller Chain FOR NO 40 1 2 Jik TG40A26K TG40A36K TG40A45K TG40A60K TG40A72K FOR NO 60 3 4 PITCH TG60A26K TG60A36K TG60A45K TG60A60K TG60A72K TG80A28K TG80A36K TG80A45K TG80A60K TG80A72K B 58795 A 53740 4 A 26023 35 A 26015 17 A 26005 16 A 26005 17 Bushing Kit No A 58211 A 58255 2 A 58168 D 58675 B 58202 A 58159 A 61684 A 58158 A 61685 A 58173 A 58182 1 A 61683 A 58172 B 58609 B 58250 B 58794 B 58795 A 53740 4 A 26023 35 A 26015 17 A 26005 16 A 26005 17 60BU012 60BU015 60BU100 60BU102 NONE 60BU020mm 60BU025mm 60BU028mm A 58238 A 58255 3 A 58171 C 58695 B 58236 A 58165 A 61687 A 58164 A 61688 B 58181 A 58182 2 A 61686 A 58174 B 58668 B 58260 B 58383 B 58385 A 53052 4 A 26023 37 A 26015 23 A 26005 16 A 26005 17 TGC200 PART NUMBER A 16512 A 15731 A 15727 D 65632 B 16510 A 17647 B 15732 1 A 17650 A 15730 1 B 73040 A 15729 2 B 15732 3 A 16511 B16506 C 65649 B17056 B 71122 B 17055 A 17059 A 73403 1 A 18874 2 A 26005 39 A 26005 40 TORQ GARD BUSHING KITS Bushing Kit No 200BU015 200BU100 200BU101 200BU102 200BU103 200BU104 200BU105 200BU106 200BU107 200BU108 200BU110 200BU111 200BU112 NONE A 16346 A 13732 A 13407 D 65927 C 13401 A 17648 A 14407 A 26007 37 A 14409 C 73044 A 14399 A 14408 B 12. Industrial Motion Control LLC 1444 S Wolf Road Wheeling IL 60090 Phone 847 459 5200 Fax 847 459 3064 CAMCO FERGUSON REGISTERED www camcoindex com The Driving Force in Automation www ferguson co com Michigan Office UK Office Belgium Office 550 Forest Avenue Unit 14 432 Perth Avenue 33 Parc Industriel Plymouth MI 48170 Slough Trading Estates BI 440 Braine le Chateau USA Slough Berkshire SL14TS Brussels Belgium ph 734 459 8080 England ph 332 367 1311 fax 734 459 8110 ph 753 786100 fax 332 366 1891 fax 753 786101 Commercial Cam Co LLC 2002 All rights reserved This publication is for information purposes only and should not be considered a binding Printed in U S A description of the product except if confirmed in writing by Industrial Motion Control LLC SKU0082 Revision 3 23 02
3. Hoffman ISO 9001 Certified Established 1959 a W Dear Colleague Thank you for visiting our website and downloading a product catalog from the R M Hoffman Company We hope this information will be useful to you in solving the application you are working on The R M Hoffman Company is located in the Silicon Valley and has been in business for over 50 years We are engineers who specialize in mechanical components such as gearboxes flex couplings rotary unions and torque releases as well as hardware items such as actuators brakes clutches and electrical slip rings We sell our solutions world wide to semiconductor medical packaging robotic machine and other builders Quite often we find that our customers want a customized version of standard product offerings and we take pride in our ability to help match our customer s engineering requirements to the exact product needed We work closely with our customers to provide modified products or an assembly of products Please give us a call and let us know how we can assist you We look forward to talking to you soon Thank you The R M Hoffman Team 408 739 6580 info rmhoffman com R M Hoffman Company 159 San Lazaro Avenue Sunnyvale CA 94086 408 739 6580 info rmhoffman com www rmhoffman com CAMCO FERGUSON SERVICE MANUAL TORQ GARD OVERLOAD CLUTCH ISO 9001 REGISTERED m The Driving Force in Automation This is a controlled documen
4. components from page 6 for the applicable Torq Gard Model 2 Mount the single strand sprocket per the above Sprocket Installation instructions 3 Place the Split Taper Bushing sprocket over the Single Sprocket with the corresponding teeth in alignment 4 Secure the two sprockets by wrapping the double strand roller chain around the sprockets insuring that the sprocket teeth fully engage the chain M 5 Insert the chain connecting link in the chain ends and lock with the spring clip Supplied with the connecting link When assembled correctly the Split Taper Bushing Sprocket will float for maximum misalignment capability Ever Flex Coupling Installation 1 Select the correct Ever Flex Coupling and Adapter Plate from page 6 2 Attach the Adapter Plate to the Torq Gard mounting lugs with three 3 Allen Flat Head Cap Screws Supplied with the adapter 3 Mount the Ever Flex half coupling on the Adapter Plate with the eight 8 Hex Head Cap Screws supplied with the Adapter Plate Quantity 10 Hex Head Cap Screws are supplied with Adapter Plate 400CAP9 and 800CAP10 Mounting The Torq Gard The Torq Gard Clutch hub is machined to its maximum bore diameter Shafts smaller than the maximum diameter are accommodated with standard Browning Torq Gard Bushing Kits as shown on page 6 The bushing kits are complete with bushing key and shaft set screws Note Six 6 set screws are supplied in four
5. die Warning The Torg Gard Clutch is not a FAIL SAFE device and cannot be used on overhauling or holding load applications TORQ GARD RATINGS Models los WK2 Max inches TRINITE a ae ee ee 203 a fof 2s pasan of eo fos so 55 f o e 50 Automatic Reset The Torq Gard Clutch is automatically reset by jogging the motor after the overload has been corrected At speeds under 50 RPM the Torq Gard will re engage without jogging upon Starting the motor The clutch will not re engage if the overload exceeds the torque setting Warning Do not re engage the Torq Gard manually When the clutch Snaps into engagement injury could occur if the operator s hand is near a chain and sprocket or belt drive Single Position The Torq Gard always resets in the same position when tripped It is an excellent choice in applications that must remain registered or timed All Torq Gard Clutches are fully reversible Lubrication The Torq Gard is factory lubricated with Mobilith AW2 and does not require additional lubrication for many years under normal Operating conditions Clutches used in extreme operating applications may be opened for regreasing Open clutch for greasing by removing torque adjusting nut detector system cover bolts and then tap hub end opposite cover with a soft hammer Do not pry open at cover split line Apply grease AW2 or equiv to hub bearing journals hub
6. hub with the correct length set screws using Perma Lok HM118 Refer to Tables B C or D for the correct shaft set screws Warning Factory mounted detector mechanisms utilize set screws for shipping purposes only The correct length of the set screws is determined by the shaft diameter used Torque Setting The torque is infinitely adjustable within the nameplated torque limits of the clutch Determine the operating and tripping torque required to drive your machine A Operating torque is the normal full load torque required by the application B Tripping torque which is usually higher than operating torque depends on the starting torque requirements of the application and the location of the Torq Gard Clutch C Mounting the clutch away from the motor tends to absorb peak starting torques through power transmission and machine components Refer to Fig 4 D Tripping torque should be set higher than the point at which the clutch will nuisance trip on starting but below the maximum torque value the machine can Safely absorb EVER FLEX TORQ GARD COUPLING MOTOR GEAR DRIVEN REDUCER MACHINE Figure 4 The Torq Gard should not be used on the high speed input side of the reducer Clutch sensitivity becomes a function of the reducer s gear ratio As an example when used with a 100 to 1 reducer a 100 inch pound torque variation on the output Side will reflect only a 1 inch pound change on the input side Do
7. 3406 C 76760 D 65879 C 16927 C 71123 B 76762 A 16989 A 73403 2 A 26002 15 A 26005 45 A 26005 46 Bushing Kit No TGC400 AND TGC800 B 16680 A 16682 1 A 16682 2 A 16685 D 18715 C 16677 A 26007 89 B 15732 4 A 26007 65 A 16683 C 16679 A 15729 3 B 15732 5 B 16681 D 18719 D 16675 C 17076 C 71126 C 17077 A 17788 A 26023 71 A 18876 2 A 26005 77 A 26005 79 800BU106 800BU107 800BU108 800BU110 800BU111 800BU112 800BU114 800BU115 800BU200 800BU202 800BU203 800BU204 NONE B 16680 A 17538 1 A 17538 2 A 16685 D 18715 C 16677 A 26007 89 B 15732 4 A 26007 65 A 16683 C 16679 A 15729 3 B 15732 5 B 16681 D 18719 D 16675 C 17076 C 71126 C 17077 A 17788 A 26023 71 A 18876 2 A 26005 77 A 26005 79 16 16A TORQ GARD CHAIN COUPLING KITS Single Sprocket Coupling For Split Taper Bushing Part No TGC60 TG40A26K 40P26 C4026 TGC200 TG60A26K 60P26 C6026 TGC400 TGC800 TG80A28K 80028 8028 TORQ GARD GEARBELT PULLEYS C8028 i 1 2 PITCH BELTS No of Belt it No Grooves Widi TGC60 TG60H100K 9 549 60 1 TaczoslTerarsook iie 7 a EVER FLEX COUPLINGS Coupling Adapter Half Plate Part No Part No Split Taper Bushing TGC60 CHCFRSH C18639 H TG100A28K TG100A36K TG100A45K TG100A60K TG100A72K TGC200 CHCFR8P C18640 Pi TGC400 CHCFR9Q 18641 ai TGC800 CHCFR10Q C18642 at TGC800
8. 4 lengths Warning The correct length set screws must be used as the clutch will not release if the set screws extend beyond the hub and hit the adapter mounting lugs The Torq Gard Clutch can be shaft mounted from the adapter or detector end of the hub The required shaft set screw lengths vary depending on the bushing selected They will also vary in length if used on the detector end in conjunction with the detector mechanism Tables B C and D include all set screw combinations for any bushing or mounting option Example 1 A TGC60 Clutch requires a 750 inch diameter shaft mounted on the adapter end Selection A Browning 60BU012 Bushing Kit is chosen from page 6 The correct set screws from Table B adapter end Qty 2 190 32UNF 2A x 50 Long Qty 1 190 32UNF 2A x 19 Long over key Example 2 A TGC60 Clutch requires a 750 inch diameter shaft mounted on the detector end with the detector mechanism Section A Browning 60BU012 Brushing Kit The correct set screws from Table B detector end Qty 2 190 32UNF 2A x 75 Long Qty 1 190 32UNF 2A x 38 Long over key NOTE If the Bushing was used on the detector end without the detector the selection would be the same as Example 1 Shaft Dia 9375 Dia 1 125 Dia 1 250 Dia Shaft Dia 9375 Dia 1 125 Dia 1 250 Dia Shaft Dia 9375 Dia 1 250 Dia 1 250 Dia 1 500 Dia 1 500 Dia 1 750 Dia Table B TGC60 Clutch Detector End Set Scr
9. Length 2 Reqd to Retain Detector Cam 190 32UNF 2A x 75 Lg 190 32UNF 2A x 62 Lg 190 32UNF 2A x 50 Lg Adapter End Set Scr Length 2 Reqd Adapter End of Clutch 190 32UNF 2A x 50 Lg 190 32UNF 2A x 38 Lg 190 32UNF 2A x 25 Lg Set Scr Length 1 Reqd to Retain Detector Cam Over Key 190 32UNF 2A x 38 Lg 190 32UNF 2A x 38 Lg 190 32UNF 2A x 38 Lg Set Scr Length 1 Reqd Over Key Adapter End of Clutch 190 32UNF 2A x 19 Lg 190 32UNF 2A x 19 Lg 190 32UNF 2A x 19 Lg Table C TGC200 Clutch Detector End Set Scr Length 2 Reqd to Retain Detector Cam 250 20UNC 2A x 1 0 Lg 250 20UNC 2A x 88 Lg 250 20UNC 2A x 75 Lg 1 750 Dia 1 9375 Dia 250 20UNC 2A x 62 Lg Shaft Dia 9375 Dia 1 250 Dia 1 250 Dia 1 500 Dia 1 500 Dia 1 750 Dia Adapter End Set Scr Length 2 Reqd Adapter End of Clutch 250 20UNC 2A x 75 Lg 250 20UNC 2A x 62 Lg 250 20UNC 2A x 50 Lg 1 750 Dia 1 9375 Dia 250 20UNC 2A x 38 Lg Set Scr Length 1 Reqd to Retain Detector Cam Over Key 250 20UNC 2A x 50 Lg 250 20UNC 2A x 50 Lg 250 20UNC 2A x 50 Lg 250 20UNC 2A x 50 Lg Set Scr Length 1 Reqd Over Key Adapter End of Clutch 250 20UNC 2A x 25 Lg 250 20UNC 2A x 25 Lg 250 20UNC 2A x 25 Lg 250 20UNC 2A x 25 Lg Table D TGC400 and TGC800 Clutch Shaft Dia 375 Dia 1 688 Dia 1 750 Dia 2 125 Dia Detector End Set Scr Leng
10. ain Coupling Kits without modification to the clutch or couplings Split taper bushings are available for the coupling output mechanical torque limiting overload clutch Browning Torq Gard single strand sprockets for No 40 60 80 and 100 ANSI Standard Roller Chain Drives mount directly to the clutch Browning Torq Gard Gearbelt Pulleys are also available for 1 2 Pitch Belts Before mounting the clutch on the driving or driven shaft your choice of coupling or sprocket should be attached to the Torq Gard Clutch Sprocket Installation Browning Torq Gard Single Strand sprockets register with the drilled and tapped mounting lugs on the adapter end of clutch Torq Gard Chain Drives can be used as the driving or driven member See page 6 for sprocket availability 1 Place the sprocket on the registered mounting lugs 2 Select the correct length Hex Head Cap Screws 3 required from Table A Warning Short Screws may strip the mounting lug threads 3 For maximum locking effect medium spring lock washers Should be used under the Hex Head Cap Screws Table A Sprocket Mounting Hardware TG20 20TG40A_K 10 24 X 62 HHCS TG800 TG100A__K 1 2 13 X 1 75 HHCS Gear Belt Pulley Installation Follow the above mounting instructions for the Browning Torq Gard Gear Belt Pulleys using the longer Hex Head Cap Screws supplied with the pulleys Chain Coupling Installation 1 Select the Browning Chain Coupling
11. cam track follower thrust washer surfaces and all needle bearings torq gard 1 250 MAX BORE 250 WIDE 12 OP KEYWAY 1 50 MOUNTING LUG PATTERN WILL ACCEPT THE FOLLOWING FOR SHAFTS SMALLER THAN 91 250 USE BROWNING BROWNING SPROCKETS TC40 AZ6K J6K 45K BOK AND 72K BUSHING KITS CHART LOWER LH CORNER 25 DETECTOR TRAWEL BROWNING GEARGELT PULLEY TESOHIGOR AT OVERLOAD l TGC 60 DETECTOR PLATE ASSY REQUIRES 3 TORQUE ADJUSTING NUT T SCREW LENGTHS REQUIRED AT 280 20 SL S6 DP SPIRALOCK THO 10 32 SET SCREWS WHICH MUST 3 MTG LUG END MUST BE 3 HOLES EG SP ON A 2 875 B C PROTRUDE 19 006 FROL HUG WITH 1 REGO 190 32 u 19 L6 OVER KEY OR WITHOUT BROWAING BUSHINGS 2 ROOD 190 32 SET SCREWS MUST NOT BROWNING BUSHINGS TCG 200 on gwos Ss Je monn en Sonn MET Ce et Se SOL WO TO fi MOD Ged w 25 L ook K YI UF fo 250 10 SO SOUD MAR Mai TGC 400 and 800 aoe ees aa aa Kin ao e 1 RYO I 18 se eR ey Ck OO DA 1 SO SOD WET KOT BEWA CRS MA DW aie vis ana Go torq gard Parts List Models TG and TGC Adjusting Nut Spring Spring Button Body Lever Dowel Pin Bearing Dowel Pin Bearing Gasket O Ring Bearing Thrust Washer Drive Hub Cover Detector Plate A 58211 A 58255 1 A 58168 D 58675 B 58202 A 58159 A 61684 A 58158 A 61685 A 58173 A 58182 1 A 61683 A 58172 B 58609 B 58250 B 58794 Prox Detector Plate Assy Cam Detect Plate Spring Roll Pin
12. not exceed the maximum RPM shown in the Torq Gard selection table Direct Drive application with the Torq Gard mounted on the low speed output shaft of the reducer The Torq Gard is shown with a Browning Ever Flex half coupling which mounts on the clutch adapter without modification Browning Chain Coupling Kits are also available for the Torq Gard when greater misalignment capabilities are required Either side of the Torq Gard can be used as the input a DRIVEN fe MACHINE TORQ GARD Bi DRIVEN H MACHINE TORQ GARD ROLLER CHAIN ROLLER CHAIN SPROCKET SPROCKET GEAR MOTOR GEAR MOTOR Mounting the clutch on the output of the The Torq Gard is mounted on the driven gear motor or reducer provides the most machine and powered through a chain and economical clutch assembly The Torq Gard sprocket drive Mounting the clutch in this is designed to protect the weakest link in position tends to absorb peak starting torques the drive system The Torq Gard Clutch is delivered with the torque set at the low end of its torque range 1 Turn the single Hex Socket Head adjusting nut clockwise to increase the Torque Setting Refer to Table E Note 1 2 inch Hex Keyed Allen Wrench is required MAXIMUM TURNS Table E APPROXIMATE TORQUE MODEL OO O75 O O S le SE ae a 8 O Pn en en e enn IN LBS PER TURN TGC800 A O1 2 Sighting the front face of the adjusting nut with the Tor
13. que Meter Lines on the nameplate indicates the approximate torque setting 3 The Min line on the nameplate is the point at which the adjusting nut is threaded Before setting the torque Perma Lok HM118 should be applied to the exposed threads 4 The first line on the Torque Meter beyond Min low torque setting Warning The clutch should not be operated at torque settings below this line 5 Do not set torque if the clutch is disengaged as an erroneous torque setting will result Warning Do not remove the adjusting nut Extremely fine threads are used to reduce the possibility of the adjusting nut losing its setting If the adjusting nut is removed for any reason including lubrication upon replacing hand thread the first few turns or cross threading may occur Tripping torque can be established by progressively increasing the torque setting until the clutch no longer trips under starting loads lf the tripping torque value is known the clutch may be pre set with a torque wrench or a torque arm and calibrated spring scale represents the The Torq Gard may also be sized by applying one of the following formulas Torque In lbs Horsepower HP x 63025 RPM OR Horsepower l0rque In Ibs x RPM 63025 Tripping Torque Operating Torque x Service Factor Note The nameplate contains a sensitized rectangle on which the torque setting may be recorded with ball point pen or a numbering
14. rma Lok HM118 to the set screws and mating tapped Warning High inertia loads reversing loads excessive vibration or continual tripping may require the use of Perma Lok HM160 6 Tighten set screws against shaft and key Warning Check to insure that the set screws do not extend beyond the hub on the adapter end When used on the detector end the set screws must also engage the detector cam but must not extend beyond the detector cam Overload Detection The axial movement of the Detector Mechanism when used in conjunction with a limit prox switch electrically disconnects the prime mover motor from the load The Detector Mechanism consists of a spring loaded plate mounted on the clutch cover plate cam When an overload occurs the cam releases the detector plate a sufficient distance to actuate a limit prox switch When the overload has been cleared the re engagement of the clutch automatically resets the detector mechanism Warning Detector systems are recommended on all applications and mandatory on the following TG60 TG200 At speeds over 100 RPM TG 400 TG800 At all speeds Infinitely high shock loads can occur depending on the type of jam or overload The detector system further protects your equipment under these conditions On high inertia applications breaking the prime mover may have to be considered 1 The limit prox switch must have a rigid mounting 2 Locate the limit prox switch so the detector pla
15. t It is your responsibility to deliver this information to the end user of the CAMCO FERGUSON product Failure to deliver this could result in your liability for injury to the user or damage to the machine For copies of this manual call your Customer Service Representative 800 645 5207 lt tora gard Installation Operation and Maintenance Instructions 1 Read your Torg Gard Installation Operation Instructions thoroughly before operating the unit for your safety and the protection of your equipment 2 Double check to be sure the power is off and cannot be turned on while working on the equipment 3 Electrical power should be disconnected at the fuse box circuit breaker or motor starter 4 The Torg Gard Clutch is designed to protect your machine and will not protect against bodily injury 5 Keep all objects such as hands clothing tools etc away from rotating or moving parts 6 Use safety glasses or equivalent to protect your eyes 7 Do not manually re engage the Torq Gard Clutch Refer to Automatic Reset instruction 8 Do not adjust the torque while the clutch is disengaged Refer to Torque Setting instruction 9 Do not exceed the recommended maximum RPM Refer to Torq Gard Rating Chart 10 The detector mechanism must electrically disconnect the prime mover at the recommended RPM settings Refer to Overload Detection instruction 11 Shaft mounting set screws must clear the mo
16. te travel will acuate the limit prox switch Note Refer to Figure 1 and Figure 2 for typical installations Figure 1 mounting is preferred for reasons of rigidity Figure 1 Figure 2 3 Refer to the Torq Gard dimension prints on page 5 for the detector plate travel 4 When mounting the limit prox switch consult the manufacturer s specifications for pre travel and overtravel 5 Wire the limit prox switch in parallel with the start contactor to permit motor starting after the overload has been cleared Note Refer to Figure 3 Typical Wiring Diagram Limit prox Switches are available with additional contacts to further acuate warning alarm systems Typical Wiring Diagram TORQ GARD 0 DETECTOR PLATE LIMIT PROX SWITCH Figure 3 6 The detector mechanism can be installed in the field A Place the three 3 detector springs in the three shallow holes in the Torq Gard cover B Place the white detector plate guide pins in the three deep holes in the cover Note The pins are registered to fit in one position only C Place the black detector cam on the clutch hub with flat Side up D Rotate the cam until each cam lobe is directly over the detector plate ears and the set screw holes are aligned with the set screw holes in the hub Note The clutch must be in its engaged position for proper alignment of the detector mechanism E Secure the detector cam to the clutch
17. th 2 Reqd to Retain Detector Cam 879 16UNC 2A x 1 25 Lg 3 9 16UNC 2A x 1 00 Lg 2 125 Dia 2 4375 Dia 375 16UNC 2A x 88 Lg Shaft Dia 1 375 Dia 1 688 Dia 1 750 Dia 2 125 Dia 2 125 Dia 2 4375 Dia 375 16UNC 2A x 50 Lg Adapter End Set Scr Length 2 Reqd Adapter End of Clutch 375 16UNC 2A x 88 Lg 375 16UNC 2A x 62 Lg Set Scr Length 1 Reqd to Retain Detector Cam Over Key 375 16UNC 2A x 62 Lg 375 16UNC 2A x 62 Lg 375 16UNC 2A x 62 Lg Set Scr Length 1 Reqd Over Key Adapter End of Clutch 375 16UNC 2A x 38 Lg 375 16UNC 2A x 38 Lg 375 16UNC 2A x 38 Lg Select the Browning Torq Gard Bushing Kit from page 6 3 required Refer to tables B C or D for the correct shaft set screws Slide the bushing with the mating key on the shaft Note The use of LOCTITE C5 Anti Seize lubricant is recommended to ease assembly of the bushing to the shaft and the Clutch to the bushing The shaft length must be at least equal to the bushing length to insure engagement of the Torq Gard bearings Limited shaft lengths or high overhung load applications require additional outboard bearing support Browning Bushings are manufactured Specifically to fit the entire length of the hub which provides additional support Again check Tables B C or D to insure that the correct length set screws are used and that they will engage the shaft holes in the Clutch hub Apply Pe
18. unting bosses or the clutch will not release upon overload Refer to Mounting the Torq Gard instruction 12 Shaft and detector mounting set screws must be tight and the recommended number used Refer to Mounting the Torq Gard instruction The above list includes major safety points to be observed but Should not be considered as limiting in safety precautions to be followed Operating Principle Torq Gard Overload Clutches help protect the entire drive train of your machinery from damage due to excessive torque generated by overloads and jamming The torque is adjusted by turning the single hex socket head control which adjusts the Torq Gard Clutch precisely to any setting within its load range A spring loaded cam follower seated in a single hub cam detent causes the hub and clutch body to rotate as a unit The two point contact of the follower produces equal forces within the cam detent minimizing the effect of breathing found in conventional clutches When the pre set torque limit is exceeded by an overload condition the follower is instantly released from the cam detent disconnecting the hub from the body Either the hub or the body may be used as the input or output NOTE During overload the Torq Gard produces a loud audible report which is a normal operating characteristic of the clutch In direct coupled applications the modular designed Torq Gard can be used with Browning Ever Flex Couplings or Ch
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