Magnetic Particle Brakes

Magnetic Particle Brakes

Placid magnetic particle brakes, also called powder brakes and mag particle brakes, provide smooth and repeatable torque control. Torque is proportional to input current, and independent of shaft speed, thereby allowing for precise control. These self-contained magnetic particle brakes are ideal for tension control, load simulation, and soft stops. Some large units are available with fan or pneumatic cooling. Torque rating from 1 oz.-in to 300 lb.-ft.

» Products » Brakes » Magnetic Particle Brakes

  • With no electrical excitation, the shaft freely rotates.
  • With electrical excitation, the shaft becomes coupled to the case.
  • While the load torque is less than the output torque, the shaft won’t rotate.
  • When the load torque is increased, the brake will slip smoothly at the torque level set by the coil input current.
  • Is proportional to input current.
  • Is independent of RPM.

Metric Units – Large Magnetic Brake Torque Range = 0.3-20 to 400 Nm.
Metric Units – Small Magnetic Brake Torque Range = 0-0.7 to 25 Nm.

Torque Curve

  • Adjustable tension – for unwinding (payout) webs.
  • Load simulation – for testing stepper motors, gear motors and mechanisms.
  • Torque limiting.
  • Soft stops.

Small Magnetic Particle Brakes

Small Magnetic Particle Brakes

Mounts in any orientation.

Mounting Option - Mount Any Orientation

Datasheet Key

Regarding Shaft Style(s)

1 = Solid Shaft Out 1 Side

2 = Solid Shaft out 2 Sides

H = Hollow Shaft

View in metric

Small Magnetic Particle Brakes - up to 220 lb.-in. (25 Nm)

ModelTorque RangeMax RPMSlip Heat Dissipation
(watts)
Max Overhung Load
(lbs)
Weight
(lbs)
Shaft Style(s)
B5ZD0.05 to 1 oz.-in.40001.50.70.21, 2Details
B5Z0.1 to 5 oz.-in.3500 20.7 0.21, 2Details
B10.6 to 16 oz.-in.3000 3.5 4 0.61 , 2 Details
B21.2 to 40 oz.-in.25008511, 2Details
B60.2 - 6 lb.-in.2000152521, H (1/4), 2Details
B150.3 - 15 lb.-in.200020252.51, H, 2Details
B350.6 - 35 lb.-in.1800305041, H, 2Details
B601 - 60 lb.-in.18005010071, 1, HDetails
B1152.5 - 115 lb.-in.18005512081, HDetails
B1503 - 150 lb.-in.130080120121, HDetails
B2204 - 220 lb.-in.1000110120211, HDetails

See data sheet for heat dissipation info.
Mounting holes - Standard: Imperial (inch), Optional: Metric

Large Magnetic Particle Brakes

View in metric

Large Magnetic Particle Brakes - up to 3600 lb.-in. (400 Nm)

ModelTorque RangeMax RPMSlip Heat Dissipation
(watts)
Max Overhung Load
(lbs)
Weight
(lbs)
Shaft Style(s)
KB-2.50.2 - 15 lb.-ft.1800130 - 2609019SolidDetails
KB-50.5 - 38 lb.-ft.1800190 - 42512531SolidDetails
PLB-501.4 - 30 lb.-ft.500160 - 24012517HollowDetails
PLB-1001.5 - 70 lb.-ft.500200 - 30017531HollowDetails
PLB-2004 - 140 lb.-ft.500350 - 50020062HollowDetails
POB-100F0.5 - 70 lb.-ft.1800300 - 80017579SolidDetails
POB-200F2 - 130 lb.-ft.1800425 - 1200200128SolidDetails
POB-400F4 - 300 lb.-ft.1800550 - 1900325225SolidDetails

See data sheet for heat dissipation info.