Cyclo® BBB4
Operation & Maintenance Manual
11
Cyclo® BBB4
Cyclo® BBB4
Operation & Maintenance Manual
11
Cyclo® BBB4
Torque Arm Installation,
continued
Turnbuckle Type Torque Arm
2
Install the turnbuckle onto the threaded extension rod (gearbox side) and then
threaded arm (foundation side) to the turnbuckle
If the assembly was supplied with hex nuts to secure the turnbuckle, install the nuts
loosely, ensuring the left hand nut is used on the threaded arm, prior to installing
the turnbuckle and threaded arm
3
Position the torque arm so it will be in tension during unit operation and mount the
fulcrum mounting bracket to suitable structure or foundation . Consider installing
two torque arms for reversing applications to allow torque arm to be in tension for
each direction of rotation .
Mounting hardware for fulcrum mounting bracket are NOT supplied by Sumitomo .
4
Position the torque arm as close as possible to 90° relative to the unit output bore /
driven equipment shaft .
Sumitomo does not recommend combining torque arm assemblies to achieve a
greater overall length .
5
Assemble the threaded
arm to the fulcrum
mounting bracket, as
shown .
Some adjustment of the turnbuckle may be required to lengthen or shorten the
overall length .
Secure it with the appropriate nut, bolt and lockwasher .
• Insert the bolt through the brackets and threaded arm eyelet .
• Place the lockwasher on the bolt and secure with nut .
OPTIMUM MOUNTING
ACCEPTABLE MOUNTING
Threaded Arm
Bolt
Nut
Lock Washer
Mounting Bracket
Unit
Size
Bolt Size
[1]
ft•lb
f
(N•m)
A
M16 x 65
152 – 167
(206 – 227)
B
M16 x 80
152 – 167
(206 – 227)
C
M16 x 80
152 – 167
(206 – 227)
D
M16 x 80
152 – 167
(206 – 227)
E
M16 x 80
152 – 167
(206 – 227)
F
Consult Factory
Table 4 . Bolt Tightening Torques
Note: [1]
Bolt Class equal to ISO/JIS Class 8 .8
90
30
30
15
15
