Ratcheting SIKUMAT with screw faces

The Screw Face Principle

Torque transmission is effected through screw-shaped radial serrations in the input and output part, which are pressed together by spring force. Like the thread sides of a screw have edge contact with the nut during turning, so the toothed flanks of the SIKUMAT retain their surface contact even during the torque disengaging process. This characteristic gives the SIKUMAT an extremely high resistance against wear and therefore a long operating life.

Advantages 

• Excellent robustness through surface contact during the disengaging process - therefore maximum life 
• Fully enclosed with integral bearing - therefore maintenance-free 
• Protection against unauthorised adjustment of the torque setting achieved by the fixed stop of the threaded ring 
• Adjustment of limit torque setting according to the number of active springs - not through modification of spring pressure

Function 

• When reaching the preset limit torque the SIKUMAT ratchets. 
• After elimination of the overload the SIKUMAT re-engages automatically. 
• The overload can be indicated by the special proximity switch for the ratcheting SIKUMAT with screw faces, thus either causing the drive to be switched off instantly or another control function to be activated.

Types

Series SC - flange design

For attaching chain wheels, belt pulleys, gear wheels etc. Bearing of attached component on the shaft to be provided by the customer. (for dimensions.pdf click download)

Series SCE - with flexible shaft coupling

For flexible connection of two shafts. The flexible elements are oil-proof. (for dimensions.pdf click download)

Series SCL - with torsionally rigid shaft coupling

For rigid connection of two shafts. Possibility to compensate for large radial and angular displacements (for dimensions.pdf click download)

Notes

Torque setting The limit torque is normally set at the factory.Setting or modification of the limit torque can also be carried out by the customer but no unauthorised adjustment can be carried out by the machine operator. See operating instructions for further details.

Proximity switch The proximity switch for the ratcheting SIKUMAT with screw faces indicates overload by non-contact means with an inductive proximity switch. See  download for details.

Speed Control ESC The RINGSPANN speed control ESC (Electronic Speed Control) monitors speed deviations and speed differences safely and also under difficult operating conditions. see ESC