Warner Electric PMC-10A3, PMC-20A3, PMC-40A3 User Manual

Electromagnetic Particle Clutches

Models: PMC-10A3, PMC-20A3, and PMC-40A3

P-223-2
819-0369

Installation Instructions

2

Warner Electric • 800-825-9050 819-0369

Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Installation Instructions . . . . . . . . . . . . . . . . . .2

Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . .4

Mechanical Data . . . . . . . . . . . . . . . . . . . . . . .4

Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . .5

PMC-10 and 20 Dimensions . . . . . . . . . . . .5-6

PMC-40 Dimensions . . . . . . . . . . . . . . . . . . . .7

Warranty . . . . . . . . . . . . . . . . . . . . .Back Cover

Introduction

This service manual provides information
required for the installation, wiring, and mainte­nance of Warner Electric's Magnetic Particle
Micro Clutch series. It also includes dimensions
and specifications. The three models covered in
this service manual are PMC-10A3, PMC-20A3,
and PMC-40A3. These models with their flanged
input hubs, also lend themselves to be mounted
as brakes. For selection information, please refer
to your Warner Electric Tension Control Systems
Catalog.

Warner Electric's Magnetic Particle clutches
provide smooth and controllable torque for a
variety of applications, including tension control,
cycling, and positioning. Quick response is
achieved by applying full rated voltage. Lower
voltage can be applied for softer engagements.
Extremely accurate tension control can be
achieved when these brakes are used with one
of Warner Electric's wide range of tension con­trols for electric clutches.

Failure to follow these
instructions may result in product damage,
equipment damage, and serious or fatal
injury to personnel.

Installation Instructions

Introduction

The design of the PMC-A3 series clutches
makes them easy to mount in various configura­tions. They have a mounting flange on the out­side diameter of the housing. The input is a
flanged hub, which is concentric to the double
ended output shaft. See Figure 1 for typical
mounting. To use the PMC-A3 as a brake, the
output shaft must be secured. See Figure 2.

Make sure all power is turned
off to this equipment when installing, as
injury (or even death) may result from contact
with live wires or rotating shafts.

Mounting bracket

Mounting bracket

Capscrews

Socket

head cap

screws

Set screws

Input hub

Timing pulley

Output shaft

Capscrews

Output shaft

Socket
head cap

screws

Input hub

Timing pulley

Output shaft

Capscrews

Flexible
coupling

Mounting
Bracket

Capscrews

Flexible
coupling

Output shaft

Figure 2* - Mounted as a brake

*Note: Shaded items are customer supplied

Figure 1* - Mounted as a clutch

3

Warner Electric • 800-825-9050 819-0369

Pre-Mounting

Note: Unit performance can be affected by

prolonged exposure to humid environments.
Please store in a dry location.

Note: The equipment covered by this service
manual must be installed in accordance with
these instructions. Failure to do so may dam­age the equipment and void the warranty.

1. Remove the magnetic particle clutch from its

shipping carton and inspect it thoroughly to
ensure that it has arrived in good condition.
When handling, please take care not to dam­age lead wires.

2. Check the input hub to make sure it turns

freely when the output shaft and housing are
held stationary. The powder inside the unit
may settle due to shock and vibration caused
during shipping. This can make rotation
noticeably difficult and can be easily reme­died by turning the unit upside down and
gently tapping the outside to loosen the pow­der.

3. Make sure the location chosen for mounting

will not expose the unit to water or oil. If
water or oil gets into the powder cavity, the
performance of the unit may be affected. If
the unit is mounted next to a gearbox, spe­cial care should be taken to prevent oil from
working its way into the unit.

4. If couplings are used to make drive system

connections, the mounting surface must
properly locate the housing to ensure that
alignment is within the coupling manufactur­er's specifications.

Mounting

Note: Do not use excessive force when mount-

ing couplings, pulleys, or sprockets on shafts.

Note: For proper function, mount magnetic
particle units horizontally.

For mounting dimensions, please refer to pages
5-7 of this service manual.

As A Clutch

Step 1: Bolt Unit in Place

Mount the unit to a vertical surface, using cus­tomer supplied fasteners. See Figure 1.

Step 2: Make Mechanical Connections

Mount couplings, pulleys, or sprockets to the
male shafts per the manufacturer's recommen­dations. The pulleys, sprockets, couplings,
mounting brackets, and bolts are customer sup­plied. (The output shaft can be used as the input
and the input hub as the output, but the output
inertia will be higher.)

As A Brake

Step 1: Bolt Unit Into Place

Secure the mounting flange and the output shaft
as shown in Figure 2. Take care to insure that
alignment is true and there is no binding in the
bearings.

Step 2: Mount Pulley, Sprocket, or Coupling

Bolt the pulley, sprocket, or coupling to the
input hub of the unit. The pulleys, sprockets,
couplings, mounting brackets and bolts are cus­tomer supplied.