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 = 0.4 - 16   to  300 lb.-ft.  (3600 lb.-in.)

View in metric units
5 solid shaft models
Brake photo		  Typical applications:
  • Adjustable tension for unwinding webs
  • Load simulation - for testing
  • Torque limiting
  • Soft stops
1 hollow shaft model
Hollow clutch photo
graphic

Mount with shafts horizontally only
Model  KB-5   Model PHC-5

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    Coil Output
Shaft
Inertia

(lb-in.-sec2)		 Over-
hung
Load
Max.

(lbs.)		 Max.
RPM		 Weight

(lbs.)		 Data Sheets

image PDF logo		 Drawings

image
Input
Current
(amps)		 Voltage
at 68°F at 160°F
KB-2.5 icon
solid		 0.4 - 16 1.3 20 24 0.034 90 1800 19 KB-2.5
data sheet		 PDF icon GIF
DXF
PHC-5 icon
hollow		 1 - 30 1.3 20 25 0.052 125 26 PHC-5
data sheet		 PDF icon GIF
DXF
KB-5 icon

solid		 1 - 38 1.8 17 22 0.084 125 31 KB-5
data sheet		 PDF icon GIF
DXF
KB-10 2 - 75 2.4 20 24 0.31 175 74 KB-10
data sheet		 PDF icon GIF
DXF
KB-20 3 - 150 2.2 17 20 0.81 200 117 KB-20
data sheet		 PDF icon GIF
DXF
KB-40 6 - 300 3.0 17 21 2.1 325 219 KB-40
data sheet		 PDF icon GIF
DXF

DRAWINGS:   PDF-Adobe Acrobat.    GIF-View within browser (Internet Explorer, Firefox, Netscape Navigator etc.).
   DXF-Import into your CAD program.



Heat Dissipation
MODEL Heat Dissipation  (watts) Compressed Air
at
100 RPM		 at
1000 RPM		 with compressed
air cooling		 Pressure
(lb.-in.2)		 Flow Rate
(ft.3 / minute)
KB-2.5 130 175 260 4 6
PHC-5 250 400 -
KB-5 190 275 425 5 7
KB-10 300 500 800 9 5
KB-20 425 800 1200 7 6
KB-40 550 1200 1900 21 14
  pdf icon.gif
  Download
1 Page Summary Sheet
in PDF format.

Fins on internal rotor move air which increases cooling with increasing RPM.

Solid shaft models - Clean, dry compressed air may be used to increase cooling.
The case has a threaded port for air connections. Threads are BSPT (tapered).

coupling photo   Adapts our
brake metric shaft
to your
inch or metric shaft.
Flexible
Couplings
           
Power Supply
for KB & PHC brakes.		   power supply photo
Power Supply
Signal Isolation Card & 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 Signal Isolation Card powers the ultrasonic sensor & scales the ultrasonic's signal, for tension adjustments.
The 0-10 volt signal controls your constant current power supply.
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