Choose a Category

Magnetic Particle Slip Clutches

DESIGN:
The magnetic particle slip clutch uses a sealed, steel outer housing and permanent
magnets arranged alternately (north and south poles) around a central hub.
The space between the housing and the magnets is filled with a ferromagnetic compound
(hysteresis particles). The particles align themselves along the flux pattern between the
steel housing and the magnets, creating a magnetic coupling between them.
The torque rating is determined by the number of particles added. The clutches
can be manufactured in the range from 2.82 to 39.55 N • cm. Because the coupling
is magnetic, torque value remains stable over time, temperature and speed value. 

APPLICATIONS:
One of the applications is for paper feeding devices on scanners, copy machines
and fax machines. Paper is an abrasive material. Pages often stick together and
usually the thickness of the paper is different. The paper feeding device uses a
powered roller to “urge” the top sheet off an infeed stack toward the interface
between a second pair of rollers just beyond the urging mechanism. On the second
pair, one of the rollers is powered; the second is unpowered, spring-loaded against
the first and rides on a shaft linked to the chassis through the magnetic particle clutch.
With no paper in the feeder mechanism, the clutch slips; when a single page is drawn
between rollers, friction between the rollers and the paper remains high enough to
maintain slippage and paper passes through the mechanism normally.

If two or more pages are drawn in, the coefficient of friction between the pages is
not high enough to drive the unpowered roller. The slip clutch now acts as a drag
brake holding back the lower roller. The roller stalls, preventing all but the top page
from continuing through the feed device. 

ZERO MAINTENANCE
CONSTANT TORQUE LEVELS 

MATERIAL:
Shell - Steel
End Caps - Plastic 

FEATURES:
Requires no power
Uses permanent magnets and magnetic particles
Long operational life
Sealed from contamination 

SPECIFICATIONS:
d Tolerances:
Fig. 1: +0.1/0
Fig. 2: +0.022/0
*D1 Tolerance: 0/-0.033 (h8)

**Optional torques available only by special order.

7 Items

per page
View as Grid List
Set Descending Direction

Scroll to view full table >>>

Product NameCatalog PDFBody Dia.Bore Size (d)Hub Dia. (D)Hub Dia. (D₁)Material (End Caps)Material (Shell)Max. Speed (RPM)Operating Torque Range (N•m)Overall Length (L)Static Torque (N•m)StockPriceQtyAdd to Cart
S90APLMP08030028 80513006.pdf20 mm81117PlasticSteel300 RPM.019-.040 N.m27.50.03 N.m Call Us
S90APLMP08060028 80513006.pdf20 mm81117PlasticSteel300 RPM.040-.060 N.m27.50.06 N.m Call Us
S90APLMP08120035 80513006.pdf20 mm81117PlasticSteel250 RPM.060-.120 N.m34.50.12 N.m Call Us
S90APLMS08099037 80513006.pdf32 mm81020PlasticSteel400 RPM.070-.099 N.m370.099 N.m Call Us
S90APLMS08150037 80513006.pdf32 mm81020PlasticSteel400 RPM.099-.150 N.m370.15 N.m Call Us
S90APLMS08199044 80513006.pdf32 mm81020PlasticSteel300 RPM.150-.199 N.m440.15 N.m Call Us
S90APLMS08301044 80513006.pdf32 mm81020PlasticSteel300 RPM.199-.301 N.m440.301 N.m Call Us

7 Items

per page
View as Grid List
Set Descending Direction

Questions? Contact Our Team

Give us a call at 516-328-3300 or fill out the form below and our team will be in touch soon. *marks required fields.


Custom Solutions

Looking for a custom solution? Contact our engineers.

contact our team