Sumitomo Cyclo BBB4 - Installation onto Driven Shaft; Taper-Grip Bushing

8 Operation & Maintenance Manual
Cyclo® BBB4
Cyclo® BBB4
Installation onto Driven Shaft
Taper-Grip® Bushing
Taper-Grip® Bushing Introduction
The keyless Taper-Grip® bushing system provides a simple and reliable shaft attachment
for Sumitomo speed reducers and gearmotors. This system allows bi-directional shaft
rotation operation with a powerful, slip-free grip. To assure peak performance of your
equipment, please read, understand and follow these installation instructions.
Prior to installation of the Cyclo® BBB4 onto the driven shaft, ensure that
the shaft length meets or exceeds the minimum shaft engagement value
“TT” detailed in Table 1.
Do not operate unit until the torque arm has been attached to the unit
and fixed to a rigid structure. The torque arm prevents counter-rotation
during unit operation. Refer to torque arm installation section in this
manual for instructions.
CAUTION: The Cyclo® BBB4 must be externally supported prior to
insertion of driven shaft into bushing. External support MUST be
maintained until all bushing socket head cap screws have been
tightened to the appropriate operational torque.
Components of Taper-Grip® Bushing
As shown in the figure on the left, the Taper-Grip® bushing includes the bushing,
thrust collar, and socket head cap screws.
Table 1. Driven Shaft Tolerance
[1]
andMinimumShaftEngagement(TT)
Taper-Grip® Bushing Installation onto Driven
Shaft
1
Remove bushing cover if unit was supplied with one.
Taper-Grip® Bushing
Socket Head Cap Screws
Thrust Collar
TT
ShaftDiameter(in) Tolerance(in)
1-3/16 – 1-15/16 +0 / -0.0015
2 – 3-1/8 +0 / -0.0018
3-3/16 – 4-11/16 +0 / -0.0021
4-3/4 – 6-1/2 +0 / -0.0025
Cyclo® BBB4 Size TT (mm) TT(in)
4A (208) 8.19
4B (242) 9.53
4C (279) 10.98
4D (326) 12.83
4E (359) 14.13
4F (412) 16.22
Shaft Diameter (mm) Tolerance (μm)
(30 - 50) (+0 / -39)
(50 - 80) (+0 / -46)
(80 - 120) (+0 / -54)
(120 - 180) (+0 / -63)
Note: [1] Based on ISO/JIS/DIN h8