Placid Industries - - Large, high torque Magnetic Particle Brakes, up to 300 lb.-feet torque.

Magnetic Particle Brake - Specifications

  graphic  Smaller brakes
available.
  brake photo
Torque range = 0.2 - 15   to  300 lb.-ft.  (3600 lb.-in.)

View in metric units

5 solid shaft models
Solid brake photo
 Typical applications:
  • Adjustable tension for unwinding webs
  • Load simulation - for testing
  • Torque limiting
  • Soft stops
3 hollow shaft models
Hollow brake photo
graphic

Mount with shafts horizontally only.
See mounting recommendations.
Model  KB-5   Model PLB-100


Torque Curve Torque is -
  • Proportional to input current
  • Independent of RPM

Characteristics - 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.


Use the sizing information to select the proper brake.

Brake Specifications
MODEL

(Click p/n
to view
photo)
image
Shaft
Style
 Torque 
Range


(lb.-ft.)
image 24v
 Coil
Maximum
Overhung
Load


(lbs.)
Max.
RPM
Weight

(lbs.)
Data Sheets

image PDF logo
 Drawings 

image
  Optional  
Electric
Fan
Cooling
image
Input
Current

(amps)
 KB-2.5 Solid

icon
0.2 - 15 1.3 90 1800 19 KB-2.5
data sheet
PDF icon DXF -
 KB-5 0.5 - 38 2 125 31 KB-5
data sheet
PDF icon DXF
 POB-100F 0.5 - 70 2.4 175 79 POB-100F
data sheet
PDF icon DXF POB-100F
with fan
 POB-200F 2 - 130 2.7 200 128 POB-200F
data sheet
PDF icon DXF POB-200F
with fan
 POB-400F  4 - 300 3.5 325 225 POB-400F
data sheet
PDF icon DXF POB-400F
with fan
 PLB-50 Hollow
icon
1.4 - 30 1.25 125 500 17 PLB-50
data sheet
PDF icon DXF -
 PLB-100 1.5 - 70 2 175 31 PLB-100
data sheet
PDF icon DXF
 PLB-200 4 - 140 2.4 200 62 PLB-200
data sheet
PDF icon DXF

DRAWINGS:   PDF-Adobe Acrobat.        DXF-Import into your CAD program.




air fitting photo   Compressed Air Cooling

Clean, dry compressed air may be used to increase cooling.
The case has a BSPT threaded port.

Standard feature.
 
Electric Fan - for the same cooling rating as compressed air.

Optional, for brakes POB-100F, POB-200F & POB-400F.
fan on brake photo

Fan part numbers:
110 VAC: F400-110
220 VAC: F400-220


Heat Dissipation
MODEL Heat Dissipation  (Watts) Compressed Air
at
 100 RPM 
 * at  
 1000 RPM 
with external cooling by:  Pressure 
(lb.-in.2)
Flow Rate
 (ft.3 / minute) 
 Compressed 
Air 
Optional
 Electric Fan 
 KB-2.5 130 175 260 - 4 6
 KB-5 190 275 425 - 5 7
 POB-100F  300 500 800 9 10
 POB-200F  425 800 1200 7 6
 POB-400F  550 1200 1900 21 14
 PLB-50 160, all RPM 240 - 7 7
 PLB-100 200, all RPM 300 - 8
 PLB-200 350, all RPM 500 - 9
* Fins on rotor move air which increases cooling with increasing RPM.



Power Supplies  -  For large brakes & clutches or multilple smaller ones.

2, 3, & 4 Amp versions   2, 3, & 5 Amp versions
PST Power Supply Photo PSH Power Supply Photo
Control Output Current via -
  • Knob (Potentiometer)
  • 0-5 volt signal
  • 0-10 volt signal
  • 4-20mA signal
More information >>
Control Output via -
  • Current Knob (Potentiometer)
  • Voltage Knob (Potentiometer)

More information >>



Ultrasonic Sensor - For Constant Tension Unwinding & Rewinding

Signal Isolation Card.gif

The ultrasonic sensor measures the diameter of the roll, to keep tension constant as roll diameter changes.
The user adjusts tension via a remote potentiometer.

The Signal Isolation Card powers the ultrasonic sensor.   The 0-10 volt signal controls the power supply.




Tension Controller / Power Supply & Hall Switch  -  For Constant Tension Unwinding & Rewinding

ZXM-32 photo   The ZHS Hall Switch senses shaft rotations. The ZXM-32 Tension Controller / Power Supply calculates the diameter of the roll, based on the web thickness and number of roll rotations. Output current is automatically changed to keep tension constant as roll diameter changes.
ZHS photo   Instructions

  Excel programming calculator
ZXM-32 Tension Controller / Power Supply          ZHS Hall Switch  


Flexible Couplings
coupling photo   Adapts the brake's metric shaft to your inch or metric shaft.

More Information >>


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