Low-speed, high-torque testing can be a challenge for dynamometers equipped with traditional load brakes. Testing that requires the brake to absorb significant horsepower and torque at low speeds can result in cogging, chatter or stick slip. Data captured when dynos are in these states is inaccurate, if captured at all. Oil shear brakes, however, are uniquely designed to absorb extreme torques at very low speed (down to 0rpm), thus allowing dynos to accurately capture data at these critical junctures.

Positorq dynamometer load brakes – on display at the expo – feature oil shear technology, which uses a film of transmission fluid between the brake disc and the drive plate. As the fluid is compressed, the fluid molecules in shear transmit torque to the other side. Since most of the work is done through the fluid molecules in shear, wear is virtually eliminated, which obviates the need for maintenance and adjustments.

In the automotive industry Positorq oil shear load brakes allow customers to acquire accurate test data relating to lifecycles, shock loading and even emissions testing/certification, engine performance, and overall machine life and performance. They are typically connected to the final output of the device or machine to be tested, accurately capturing data even at 0rpm.

Booth: 4032