Sumitomo Cyclo BBB4 - Shrink Disc Type Hollow Bore

3
Once driven shaft has been completely inserted into the unit’s keyed hollow bore,
secure the shaft in place using a keeper plate as shown to the left, or some other
means of securing the unit to the driven shaft.
Do not operate unit until the torque arm has been attached. Refer to
the Torque Arm Installation section in this manual for instructions.
Cyclo® BBB4
Operation & Maintenance Manual 13
Cyclo® BBB4
Installation onto Driven Shaft, continued
Keyed Hollow Bore, Shrink Disc Type Hollow Bore
Size
a b c d e
CC(ISO/JIS) A2 Bearing Nut Threaded Rod
4A 55 25 51104 M16 M16 x 250
4B 65 25 51105 M20 M20 x 300
4C 75 25 51105 M20 M20 x 300
4D 85 35 51107 M24 M24 x 400
4E 100 35 51107 M24 M24 x 400
4F 120 46 51109 M30 M30 x 450
Table3.JigDimensions(mm)
Spacer b
Retaining Ring a
Ball
Bearing
c
Threaded Rod e
Nut d
A2
Shrink Disc Type Mounting Introduction
The keyless Shrink Disc provides a reliable commodity 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.
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 hollow bore. External support
MUST be maintained until all shrink disc socket head cap screws have been tightened to the appropriate operational torque.
Bore and Shaft Tolerance Specifications
• RefertothecertiedoutlinedrawingorCyclo®BBB4Catalogforrecommendedmachineshaftdimensions.
• Unlessotherwisespecied,thetoleranceoftheShrinkDiscBoreconformstoJISH8.
• Ifapplicationinvolveshighshockloadingand/orlargeradialloads,ashafttoleranceofJISjs6orJISk6isrecommended.