End users want durable products that will last. To help our customers achieve this, our engineers design torque slip solutions that do just that.
The RENCOL® Tolerance Ring solution is custom designed to the optimal torque level rather than having to choose. Tolerance Ring designs for 0.2 Nm to 300 Nm and beyond are possible, depending on physical dimensions and the strength of the system for which the tolerance ring is designed.
The tolerance ring offers a smooth feel, defining the perception of quality for human operated systems.
Torque Overload Protection
Some systems require protection from damage caused by end user misuse or occasional situations like an input shock or an unexpected block. Such systems can be found in electric motors for robotics or automotive systems including: rack and pinion, belt drive, steering column anti-theft, powered tailgate hinges, and braking assist systems.
The RENCOL® Tolerance Ring fixes driven components together and transfers torque unless a threshold is exceeded. At this point the RENCOL® Tolerance Ring allows the components to slip relative to each other, so limiting the torque that the components have to withstand and protect those components from damage that might otherwise occur. RENCOL® Tolerance Rings allow designers to take advantage of opportunities to use lighter and less bulky components in their systems, relying on the protection from overload afforded by the RENCOL® Tolerance Ring.
Caption: These are theoretical guidance values for typical tolerance ring configurations. Applications outside of these limits are possible.
Consistent Torque for Life
In some applications maintaining consistent torque over a large number of slip-cycles is required. RENCOL® Tolerance Rings can be designed to reduce torque-drop over multiple slip-cycles that is often seen on other torque overload protection devices. Using RENCOL® Tolerance Rings in this way gives consistent performance for the life of the system.
Caption:This illustration shows typical torque performance of a 50 mm diameter tolerance ring slipping on a steel shaft over 5000 slip cycles.
Savings in Torque Slip Applications
Torque slip devices -- or slip clutches -- can be complicated systems with many components. A RENCOL® Tolerance Ring solution uses one component in-line with the mating components to reduce weight, space and overall cost.
Torque slip devices come in many forms such as: magnetic clutch, friction slip devices, and ball detent devices. Compared to a RENCOL® Tolerance Ring, all of these devices require more space to reach similar levels of torque.
The space saving for tolerance rings is enabled because tolerance rings work as an inline fixing between the driving and driven components. This means there is no need for an extra slip-clutch unit which takes up more space and weight.
How We Make a Big Difference
A tolerance ring isn’t just a stand-alone component; it is an integral part of a larger system that means a detailed, knowledge-based approach is needed for tolerance ring design. That is why a RENCOL® Tolerance Ring is designed in collaboration with our customers, engineer to engineer. This process is made more powerful by using our FEA capabilities along with in-house testing to analyze the system, with mating components included and under key conditions. This means that we and our customers can have confidence in the solutions we provide.