Magne Corporation
9380 Watson Industrial Park | St. Louis, MO 63126 | 314/968-9500 | Fax 314/968-3030 | a 1-888-77-MAGNE (888/776-2463)



Magnetic Particle Brake on a Non-Contact Unwind

Web Force (F) = 12 lbs.
Web Speed (V) = 200 fpm
Core Diameter (d) = 3 in.
Full Roll Diameter (D) = 30 in.

1. Calculate Torque

2. Calculation Speed

3. Calculate Slipwatts

4. From Slipwatts vs rpm curves, the 25MB90S will dissipate 140 Watts at 255 rpm.

5. Select 25MB90S.



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