Sumitomo Cyclo BBB4 - Torque Arm Installation; Torque Arm Introduction; Turnbuckle Type Torque Arm

16 Operation & Maintenance Manual
Cyclo® BBB4
Cyclo® BBB4
16 Operation & Maintenance Manual
Cyclo® BBB4
Cyclo® BBB4
Torque Arm Introduction
A torque arm is a device used to prevent counter-rotation of the shaft mounted
reducer/gearmotor during operation.
The torque arm must be mounted in tension when torque arm
mounting point is greater than 6 inches (150mm) from machine
mounting point or, tie-rod or turn buckle type torque arm is used.
Torque Arm Installation
Torque Arm Introduction, Turnbuckle Type Torque Arm
1
Attach the torque arm threaded extension rod to the bevel housing, as shown
in Figure 1, at the housing corner eyelet, using the appropriate nut, bolt and
lockwasher.
•Inserttheboltthroughthebrackets,torquearmsleeve(ifsupplied)andreducerhousing
eyelet.
•Placethelockwasherontheboltandsecurewithnut.
Unit
Size
Bolt Size
[1]
ft•lb
f
(N•m)
A M16 x 75 152 – 167 (206 – 227)
B M20 x 100 290 – 319 (392 – 431)
C M24 x 105 507 – 558 (686 – 755)
D M24 x 125 507 – 558 (686 – 755)
E M24 x 125 507 – 558 (686 – 755)
F Consult Factory
Table 6. Bolt Tightening Torques
Note: [1] Bolt Class equal to ISO/JIS Class 8.8
Turnbuckle Type Torque Arm Parts
Item Number Description Item Number Description
1 Hex Nut 7 Locke Washer
2 Lock Washer 8 Fulcrum Mounting Bracket
3 Threaded Extension Rod 9 Hex Bolt
4 Turnbuckle 10 Locking Nut (if supplied)
5 Threaded Arm 11 Locking Nut (if supplied
6 Hex Bolt 12 Hex Bolt
Table 5. Turnbuckle Type Torque Arm Parts
Insert Bolt
Tighten Nut
1 2 3 4 5 6 7
12 9
1011
8
Figure 1. Turnbuckle Rod Type Torque Arm Parts