Ratcheting SIKUMAT® ST … – Backlash free with balls Advantages • Backlash free in both directions of rotation • Compact design • Integral ball bearing for supporting the component to be connected • Very high response accuracy through the ball principle • Simple and backlash free fastening onto shaft with integral cone clamping element • Calibrated micro adjustment of torque setting possible, even post-installation The Ball Principle - Backlash free The torque is transmitted via balls which are pressed into V-shaped grooves. The grooves are arranged axially on the output side and radially on the input side, which means that torque can be transmitted backlash free in both directions of rotation. As the preset limit torque is reached, the balls rise out of the axial grooves and ratchet into the respective next axial groove – until the overload has been eliminated. The negative characteristic disc springs give extremely fast, accurate and consistent overload protection. Function • When the preset limit torque has been reached the SIKUMAT® ratchets through. • Automatic re-engagement of the SIKUMAT® after the overload has been eliminated. • The overload can be indicated by a proximity switch. This means that the drive can be switched off immediately or another control functi

Ratcheting SIKUMAT® ST … – Backlash free with balls Types Series ST - Basic version with flange connection For attaching chain wheels, belt pulleys, gear wheels etc. Support of the component to be connected directly on the integral ball bearing. Series STG - with long hub With long hub for wide components to be connected. Support of the component to be connected directly on the integral ball bearing; additional radial bearing to be provided by the customer. 21-2 Series STE - with flexible shaft coupling For flexible connection of two shafts. Series STL - with torsionally rigid shaft coupling...

Ratcheting SIKUMAT® ST – Backlash free with balls Basic version with flange connection Z = number of tapped holes G on pitch circle T · Installation must be shut down as soon as torque limiter responds Technical Data Type Dimensions Type Example for Ordering Type Preset limit torque with proximity switch Torque type

Ratcheting SIKUMAT® STG – Backlash free with balls with long hub Z = number of tapped holes G on pitch circle T · Installation must be shut down as soon as torque limiter responds Technical Data Type Dimensions Type Diameter d2 at the end of the long hub is equal to the selected diameter d and serves as an additional centering. *Available bore diameters d: 10, 11, 12, 14, 15, 16, 18, 19, 20, 22, 24, 25, 28, 30, 32, 35, 38, 40, 42, 45, 48, 50, 55 and 60 mm. Example for Ordering Type Preset limit torque with proximity switch Torque type

Ratcheting SIKUMAT® STE – Backlash free with balls with flexible shaft coupling Installation must be shut down as soon as torque limiter responds Technical Data Type Dimensions Type Engagement travel Example for Ordering Type Preset limit torque with proximity switch Torque type

Ratcheting SIKUMAT® STL – Backlash free with balls with torsionally rigid shaft coupling Installation must be shut down as soon as torque limiter responds Technical Data Type Engagement travel Example for Ordering Type Preset limit torque with proximity switch Torque type