| Brunel Torque Limiting Clutches | |
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| Type JBB -
Automatic Reset Release Torque: 50 to 1000 Ib ft, 70 to 1356Nm |
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Technical Features |
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The drive is transmitted between the hub flange 1 and the drive flange 2 by the balls 4, spring-loaded into the pockets on the ball detent ring 3 secured by dowels.
Disengagement
On overload, the balls are displaced axially through the hub flange, further compressing the springs. Once out of their pockets, the balls roll on the face of the hub flange for one revolution before re-engaging and synchronizing the drive.
Torque Adjustment
The release torque is set by tightening nut 5 thus increasing the spring pressure. After setting, the nut is locked by a set screw.
Clutches can be supplied pilot bored or finish bored and keywayed. The hub may be fitted to either shaft and should be axially constrained against a shoulder to resist the resetting force and locked by means of a set screw onto the shaft key. The drive flange may be connected to a flexible coupling or can carry a sprocket or pulley.
Application
This type of protection is ideally suited to drives where it is essential to restart in the correct sequence and where access for manual resetting is not available.
Applicable
to all variants.Note: Type JBB clutches should always be used with a limit switch to bring the drive to rest within a few revolutions thus preventing possible damage by continual releasing and resetting.