Overload Clutches

RINGSPAN Overload Clutches are mechanical safety devices which disconnect the output from the input when a pre-set limit value has been reached. Thus they protect against damage and stoppage times caused by overload.

For over 50 years RINGSPANN has manufactured Overload Clutches with an excellent track record in the most diverse applications. Today RINGSPANN offers a comprehensive range of positive and friction Overload Clutches.

Positive Torque Limiters

Positive SIKUMAT® Torque Limiters are used as precision safety devices in installations and machines. The unsurpassed variety of working principles offer optimal solutions to every type of application.

Friction Torque Limiters

Friction Torque Limiters are available in two designs which are RIMOSTAT® Torque Limiters and Belleville Spring Torque Limiters

Force Limiters

RINGSPANN has designed a series of Force Limiters, outstanding in that forces up to a certain size can be transmitted in both directions completely free of play and rigid. On exceeding the pre-set disengaging force, the power of the force is interrupted and the output part is no longer driven. After the overload has been cleared the driving part and the driven part are aligned towards each other and the Force Limiter re-engages automatically.

Can be fitted with non-contact proximity switch to give early warning of reaching a certain force, or disengaging signal.

Positive Torque Limiters Features:

Ratcheting

• When the pre-set limit torque has been reached 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.

Synchronous Ratcheting

• When the pre-set limit torque has been reached the SIKUMAT® ratchets through.
• Following elimination of overload automatic synchronous re-engagement of the SIKUMAT® to the starting position after 360°.
• The overload can be indicated by a proximity switch. This means that the drive can be switched off immediately or another control function can be activated.

Disengaging

• When the pre-set limit torque has been reached the SIKUMAT® disengages the input and output.
• After the overload has been eliminated the SIKUMAT® can be switched on again manually.
• This means that an axial switching force must be applied to the switching ring.

Friction Torque Limiters

RIMOSTAT®-Torque Limiters RSHD Features:

• Better stability of slipping torque than Belleville spring torque limiters over duration of the operating period
• Adjustment of slipping torque setting according to the number of active springs – not through modification of spring pressure
• Superb wear-behaviour during high energy-input
• High temperature resistant
• Nickel free friction pads

RIMOSTAT®-Torque Limiters RS … and Belleville Spring Torque Limiters RT Features:

• When the pre-set slipping torque has been reached the built-in component (e. g. chain wheel) slips.
• During the slipping process, input and output rotate relative to each other and the pre-set slipping torque continues to be transmitted.
• Inherent in the slipping process is a high energy consumption.
• Re-engagement is not necessary.

RIMOSTAT®-Torque Limiters RS … Benefits:

• Particularly suitable in applications with frequent slipping
• Better stability of slipping torque than Belleville spring torque limiters over duration of the operating ­period
• Adjustment of slipping torque setting according to the number of active springs – not through modification of spring pressure

Belleville Spring Torque Limiters RT Benefits:

• Cost effective, simple Torque ­Limiter
• Adjustment option for pad wear
• 12 Sizes for slipping torques from 0,5 Nm to 10 000 Nm

Force Limiters

• Forces limited in both directions
• High response accuracy
• Automatic re-engagement
• Maintenance-free
• Robust construction
• Uncomplex design
• Easy to build on
• For disengaging forces up to 140 000 N
• Disengaging force finely adjustable

Torque Limiters

• SIKUMAT® with screw faces for particularly heavy-duty operating conditions.
• SIKUMAT® with double rollers for high consistency of the limit torque over the duration of the operating period.
• SIKUMAT® with balls for very high response accuracy as well as for backlash free transmission torque
• SIKUMAT® with single rollers for universal application conditions.

Friction Torque Limiters

• RIMOSTAT® Torque Limiters for high torque consistency even during frequent slipping.
• Belleville Spring Torque Limiters for particularly cost-effective solutions.

• Positive Torque Limiters
• Friction Torque Limiters
• Force Limiters