SG Transmission > Technical Information > Mounting & Installation Data > Clutch Brake Modules

Module Type 55

SG Transmission clutch brake modules are used whenever the prime mover is required to run continuously and the output of the device which is driving is to have a controlled “stop and start” action. Allowing an electric motor to run while controlling its output with a clutch brake module reduces the power consumption of the system considerably.

Because these modules are precisely manufactured with positive clutch and brake action and no backlash they can be controlled by relatively simple solid state electronics to give accurate stopping and starting with frequencies over 300 cycles per minute.

Advantages:

Easy installation

The clutch and brake are ready assembled in a neat package which can be foot mounted or fitted to a standard IEC motor and reducer flanges.

Robust Construction

Type 55 modules are completely enclosed and use deep groove ball bearings on the input and output. They can be mounted in any position, vertically or horizontally.

Zero Backlash

The clutch and brake use a common driven armature, and therefore backlash during torque transmission and braking is eliminated.

Low Wear Rate

A common armature plate is used, and during the change over from transmission to braking there is no interaction between the clutch and brake. Therefore heat generation and wear are minimised.

Safety

Clutch and brake linings are hard wearing and do not contain asbestos.

Maintenance

SG Transmission clutch brake modules are virtually maintenance free. However they are sometimes used to control large inertia loads with high switching frequencies and in these cases the air-gap between the clutch face and the armature plate should be regularly checked and adjusted if necessary.

Adjustments

1.) Remove the black plastic plugs from the housing and energise the brake (output) coil.
2.) Measure the gap between the clutch face and the armature with feeler gauges.
3.) If the gap exceeds dimension ‘G’ (type 55 data sheet) by more than 0.20mm an adjusting shim should be removed. The plastic shims are colour coded, amber shims are 0.1mm thick and the blue shims are 0.2mm thick. Steel shims are 0.2mm thick.
4.) The adjusting shims can be removed by simply loosening the fixing screws which clamp the input/output modules to the housing. The shims are semi-circular in shape and can easily be removed with a set of pliers.
5.) After removing the correct number of shims to reset the air gap to dimension ‘G’, tighten the housing screws ensuring the shims are properly located.
6.) Re-check the air-gap in 3 places radially and refit the plastic plugs.