Friction clutch and brake PHT series

friction clutch and brake
friction clutch and brake
friction clutch and brake
friction clutch and brake
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friction, hysteresis
electromagnetic, magnetic

Min.: 0.0025

Max.: 5.16

Rotational speed

Min.: 700 rpm (4,398.23 rad.min-1)

Max.: 10,000 rpm (62,831.85 rad.min-1)


The PHT series Permanent-Magnet Hysteresis Clutch/Brakes deliver accurate and reliable torque, with minimal static and dynamic torque difference, as the hysteresis field is used for torque transmission. This also makes them immune to wear and friction enabling better accuracy and repeatability compared to standard friction tensioners. They provide a constant and stable torque regardless of the speed range or permissible slip speed, and each unit features manual torque adjustment over a wide range, for added flexibility. These units are supplied bearing mounted and preassembled simplifying installation. As these units transmit the torque via magnetic flux, there is no physical contact and no wear, enabling very long service life, and contamination free operation (no wear particles). Additionally, due to permanent magnets these units do not require an electrical power source. ACCURATE AND DEPENDABLE TORQUE Since torque is transmitted via a hysteresis field, there is minimal difference between the static and the dynamic torque. These units are unaffected by friction and wear, therefore torque is substantially more accurate and repeatable than friction tensioners. CONSTANT TORQUE (ADJUSTABLE) Units can deliver set torque regardless of speed range. Each unit's torque settings may be manually adjusted over a wide range providing great flexibility. STABLE TORQUE A consistent torque is maintained regardless of allowable slip speed due to the hysteresis principle. SIMPLE INSTALLATION Units are provided bearing mounted and pre-assembled.



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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.