Inertia dynamic type sc_specsheet
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This document provides information on SC series mechanical clutches, including their principles of operation, types (overrunning, start/stop, single revolution), ordering information, dimensions, and an example part number. The basic SC clutch uses a wrap spring to positively lock the input and output hubs together during rotation in one direction and allows them to overrun in the other direction. Control tangs can be added to modify the clutch for start/stop or single revolution functions. Dimensions and specifications are provided for selecting the appropriate clutch.
Inertia dynamic type sc_specsheet
- 1. 46 Model SC Clutch Descriptions Principles of Operation The three basic parts in the wrap spring clutch are the input hub, output hub, and spring. The inside diameter of the spring is slightly smaller than the outside diameter of the two hubs. Rotation at the input hub in the direction of the arrow engages the spring and positively locks the two hubs together. Adding a control tang allows the spring to be disengaged, permitting the input hub to overrun. SC Series Clutch SC clutches are mechanically actuat- ed. They can be used in overrunning (OR), start/stop (SS) and single revolu- tion (SR) applications. a.) SC Overrunning Clutch – OR When the input hub is rotated in the direction shown, the spring wraps down and engages the input to the output hub. When the input hub is stopped or reversed, the spring unwraps, allowing the output hub to overrun. These clutches can also be used for backstopping and indexing. In the backstopping mode, either the input or output hub is attached to a fixed member, while the other hub is mounted on a rotating part. Rotation is permitted in one direction, but locked in reverse rotation. Indexing provides an accurate and smooth intermittent rotary output from recip- rocating input in variable angular increments. b.) SC Start/Stop Clutch – SS In this mode, the control tang rotates with the input hub, thus engaging the clutch. When the stop collar locks the control tang, the spring unwraps, allowing the output hub to coast while the input hub continues to run. c.) SC Single Revolution Clutch – SR In this mode, another control tang is added to the spring and fixed to the output hub. When the stop collar engages the control tang, the output hub will not overrun. Remember, only a maximum of 10% of the load will be stopped with the SC single revolu- tion clutch. Input Hub Wrap Spring Output Hub Control Tang Output Input Control Tang Output Input Output Input Drive Spring Shaft Assy. Hub SC Input Control Tang Output Control Collar Wrap Spring Clutches & Brakes ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com Sold & Serviced By:
- 2. 47 Model SC Clutches Note: Rotation is determined by looking at the pilot or free hub end. INPUT TYPE 1=Hub 2=Shaft BORE SIZE IN 1/8 INCHES 02=1/4 (.250) 03=3/8 (.375) 04=1/2 (.500) 06=3/4 (.750) 08-1 (1.000) 10=1-1/4 (1.250) 11=1-3/8 (1.375) 12=1-1/2 (1.500) SC Series Mechanical MAX. MAX. RADIAL MODEL STATIC OPERATING BEARING NO. TORQUE SPEED LOAD AT LB. – IN. (RPM) MAX. RPM SC-2 25 1800 6.75 LB. SC-4 125 1200 13.5 LB. SC-5 250 750 31.5 LB. SC-6 500 500 63.0 LB. SC-8 2500 300 144.0 LB. How to Order: 3 - - 0 - 0 0 See page 48 to 50 for applications and selection information SIZE 02=2 04=4 05=5 06=6 08=8 # OF STOPS 99=0 01=1 02=2 04=4 ROTATION 1=CW, SR 2=CCW, SR 3=CW, SS 4=CCW, SS 5=CW, OR 6=CCW, OR FEATURES 0=NONE SR units (Brake Torque is 10% of Maximum Torque). A 0.250 0.375 0.500 0.750 1.000 1.000 1.250 1.375 1.500 MODEL NO. SC–2 SC–4 SC–5 SC–6 SC–8 B 0.94 1.25 1.56 2.44 2.44 4.00 4.00 4.00 4.00 C 1.25 1.38 1.88 2.31 2.31 3.50 3.50 3.50 3.50 D 0.16 0.14 0.14 0.28 0.28 0.30 0.30 0.30 0.30 E 0.34 0.28 0.38 0.50 0.50 0.60 0.60 0.60 0.60 F 0.49 0.67 1.00 0.87 0.87 1.98 1.98 1.98 1.98 G 0.344 0.347 0.345 0.282 0.282 0.463 0.463 0.463 0.463 K 8-32 SS 0.125 Pin Hole 0.188 Pin Hole 1/4 - 20 SS 1/4 - 20 SS 3/8 - 16 SS 3/8 - 16 SS 3/8 - 16 SS 3/8 - 16 SS J 0.940 1.250 1.562 2.437 2.437 4.000 4.000 4.000 4.000 H 0.250 0.250 0.250 0.124 0.124 0.180 0.180 0.180 0.180 I 0.877 1.125 1.500 1.562 -1.559 1.562 - 1.559 2.374 - 2.372 2.374 - 2.372 2.374 - 2.372 2.374 - 2.372 M 0.54 0.72 0.85 1.50 1.50 2.00 2.00 2.00 2.00 N – – – 3-Holes, 1/4-20 EQ. SP on 2.062 B.C. 6-Holes, 5/16-18 EQ. SP on 3.375 B.C. O – – – 3/4 Bore 3/16 x 3/32 1 Bore no Keyway 1 Bore 1/4 x 1/8 1-1/4 and 1-3/8 Bore 5/16 x 5/32 1-1/2 Bore 3/8 x 3/16 Keyway L 1.00 1.31 1.56 2.70 2.70 3.75 3.75 3.75 3.75 SC Series Dimensions C F G H E D K JIAB O M N L Example SC-6 clutch, hub input, 3/4" bore, 2 stops, clockwise single revolution. Part No. 3106-0602-10-00 Wrap Spring Clutches & Brakes ELECTROMATE Toll Free Phone (877) SERVO98 Toll Free Fax (877) SERV099 www.electromate.com sales@electromate.com Sold & Serviced By: