SERVICE MANUAL RITE-TORQ OVERLOAD CLUTCHES (TORQUE LIMITERS) SOLUTIONS IN MOTION™ WARNING This is a controlled document. 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.
TABLE OF CONTENTS General Information ........................................................................................... 3 Safety......................................................................................................... 3 Operating Environment.............................................................................. 3 Application Recommendations .................................................................. 4 Requesting Service.................................................
General Information The FERGUSON Torque Limiter is a high quality, precision mechanism. To gain the optimum benefits, the guidelines described in this manual should be used. Safety Read and follow all Warnings and Cautions prior to any service or repair. 1. Read your Overload Clutch Installation-Operation Instructions thoroughly before operating the unit, for your safety and the protection of your unit. 2.
Application Recommendations 1. On applications other than the output of an IMC Index Drive, clutch speeds must not exceed 100 RPM. 2. High humidity, contaminants, or wash down applications may require special protection. If rust forms within the clutch, it may act as a solid coupling and will not release under overload conditions. Lubricate every six months or more frequently as the application requires. 3.
Overview The drawings contained in this document are for illustrative purposes only. They are not intended to accurately represent the components and therefore are not to scale. The various models may be different than shown, depending upon options chosen or the particular configuration.
Location Map – RT & RTM Series CLUTCH TYPE ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 6 PART NAME CLUTCH HOUSING – SPLIT CLAMP FOR SHAFT CLUTCH HOUSING – PILOT FOR FLANGE MTG CLAMP SCREW TORQUE ADJUSTING RING NUT LOCKING SET SCREW SPRINGS PRESSURE/TRIP DETECTION RING THRUST RACE – THIN THRUST BEARING THRUST RACE – THICK ROLLER DETENT PLATE SET DOWEL PIN – CLUTCH SCREW – CLUTCH DOWEL PIN – COUPLING SCREW – COUPLING RETAINER COUPLING CLAMP SCREW S/S ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü ü S/F ü ü ü
Location Map - RTL Series FIGURE 2 5 Item No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Part Name Housing Body End Plate Pressure Ring Actuator Plate Spacer Stud Torque Adj.
Specifications Model RT-3 Bore Sizes Trip Torque Range Approximate Weight (less crating) Polar Moment of Inertia (in.) (in-lb) (lb) (lb-in-sec2) (mm) (Nm) (kg) (kgm ) .500-.750 100-500 4-6 .019-.024 11,0-19,0 11,3-56,5 2-3 0,003-0,003 RT-5 .750-1.250 500-3500 13-16 .111-.141 RTM-5 16,0-32,0 56,5-339,1 5,9-7,3 0,013-0,016 1.000-2.000 2000-8500 28-37 .322-.
Installation NOTE: Ferguson detent style torque limiters are single positioning, and will re-engage on each revolution. Avoid continuous tripping as it will cause serious damage to the mechanisms. NOTE: Use of a limit switch (mechanical or proximity) provided by the user is required to shut down the power after the initial trip. Ferguson torque limiters are provided with a switch actuating plate or flange to detect the axial tripping movement.
RTL & RTL-FCB Series NOTE: Steps 1-8 apply to RTL-FCB type clutch. 1. RTL-FCB (shaft/shaft) torque limiters are furnished with a flexible coupling to tolerate moderate angular and/or parallel misalignment. The maximum acceptable angular misalignment is 0.5 degree and maximum acceptable parallel offset is 0.005”. 2. Determine angular alignment by checking the gap between the coupling and the torque limiter with a ruler, caliper or gauge. The gap should be even all around but not exceed 0.
METRIC INSTALLATION SPECIFICATIONS Trip Torque (Nm) Model MIN. Actuator Max. Plate Sprocket Mounting MAX RPM Travel Thread* B.C. Max. NO. Pilot Dia.
Adjustments RT & RTM Series Torque Adjusting Nut Locking Set Screw FIGURE 7 1. To adjust trip torque, remove locking set screw. Use spanner wrench to adjust nut position. Turn clockwise to increase torque or counterclockwise to decrease. See Chart 5 for torque adjustment values. 2. Replace locking set screw after achieving required torque. NOTE: 1) Total torque range in the different models is achieved by a combination of different spring groups and applied pressure through the adjusting nut.
Spring Sets for RT Clutches Torque Range Nut Adjustment RT Clutch Range in-lbs Nm in-lbs* Nm* RT/RTM3- 1 100 – 175 12 – 20 10 1,13 2 175 – 275 20 – 31 15 1,69 3 250 – 350 28 – 40 20 2,26 4 325 – 500 37 – 56 30 3,39 1 500 – 850 56 – 96 50 5,56 2 800 –1700 90 – 192 100 11,30 3 1600 – 3000 181 – 339 200 22,60 1 1000 – 2700 113 – 305 275 31,07 2 2500 – 5000 282 – 565 525 59,22 3 4000 – 8500 452 – 960 950 107,34 1 4000 – 9500 455 – 1073 600 67,79 2
RTL & RTL-FCB Series NOTE: Trip torque should be less than the maximum the machine can absorb without risk but great enough to prevent undesirable nuisance tripping due to inertia or starting loads. Ideally, trip torque should be approximately 40% higher than the operating torque of the machine.
Maintenance NOTE: FERGUSON detent torque limiters are factory lubricated and sealed. Unless the unit is subjected to severe loads, frequent tripping, or harsh environment, replenishment of lubricant is seldom necessary more often than once a year. 1. Annually disassembly unit, clean and inspect parts. Check bearings and seals and replace if necessary. Inspect detents and detent plate for wear. If necessary, replace torque limiter. 2.
1444 S. Wolf Road Wheeling, IL 60090 USA ph: 847-459-5200 toll-free: 800-645-5207 fax: 847-459-3064 e-mail: mktg@camcoindex.com Sales Office Camco-Ferguson Michigan 550 Forest Avenue, Unit #14 Plymouth, MI 47170 USA ph: 734-459-8080 fax: 734-459-8110 www.camcoindex.com European HQ Ferguson Co., S.A. 33 Parc Industriel B-1440 Braine-le-Château Belgium ph: +32 (0)2 367-1311 fax: +32 (0)2 366-1891 e-mail: sales@ferguson.be ISO 9001:2000 registered Sales Office Camco UK Ltd.
