Installation and Service Instructions
for 1-056-X00* Series (all revisions)
Manual Adjust Brakes
®
Spring-Set Disc Brakes
P/N 8-078-905-60
effective 04/03/09
Typical Nameplate
Important
Please read these instructions carefully before
installing, operating, or servicing your Stearns
Brake. Failure to comply with these instructions
could cause injury to personnel and/or damage
to property if the brake is installed or operated
incorrectly. For definition of limited warranty/lia-
bility, contact Rexnord Industries, LLC, Stearns
Division, 5150 S. International Dr., Cudahy, WI
53110, (414) 272-1100.
Caution
Installation and servicing must be made
1.
in compliance with all local safety codes
including Occupational Safety and Health
Act (OSHA). All wiring and electrical con-
nections must comply with the National
Electric Code (NEC) and local electric
codes in effect.
Use of this brake in atmospheres contain-
2.
ing explosive gases and dusts must be
in accordance with NEC article 501. This
brake is not suitable for use in certain
atmospheres containing explosive gases
and dusts.
HazLoc
inspection authorities
are responsible for verifying and authorizing
the use of suitably designed and installed
HazLoc
equipment. When questions arise
consult local
Authority Having Jurisdiction
(AHJ)
.
To prevent an electrical hazard, disconnect
3.
power source before working on the brake.
If power disconnect point is out of sight,
lock disconnect in the
off
position and tag
to prevent accidental application of power.
Make certain power source conforms to
4.
the requirements specified on the brake
nameplate.
Be careful when touching the exterior of an
5.
operating brake. Allow sufficient time for
brake to cool before disassembly. Surfaces
may be hot enough to be painful or cause
injury.
Do not operate brake with housing
6.
removed. All moving parts should be
guarded.
Installation and servicing should be per-
7.
formed only by qualified personnel familiar
with the construction and operation of the
brake.
For proper performance and operation, only
8.
genuine Stearns parts should be used for
repairs and replacements.
After usage, the brake interior will contain
9.
burnt and degraded friction material dust.
This dust must be removed before servic-
ing or adjusting the brake.
DO NOT BLOW OFF DUST using an air
hose. It is important to avoid
dispersing dust into the air or inhaling it, as
this may be dangerous to your health.
a) Wear a filtered mask or a respirator
while removing dust from the inside of a
brake.
b) Use a vacuum cleaner or a soft brush to
remove dust from the brake. When brush-
ing, avoid causing the dust to become air-
borne. Collect the dust in a container, such
as a bag, which can be sealed off.
10.
Caution!
While the brake is equipped with
a manual release to allow manual shaft
rotation, the motor should not be run with
the manual release engaged, to avoid over-
heating the friction disc(s).
General Description
These series of brakes are spring-set, elec-
trically released. They contain one or more
rotating friction discs (4) driven by a hub (16)
mounted on the motor or other shaft.
Note:
Fan-guard mounted brakes requiring
IP54 & IP55 protection may require additional
sealing measures beyond seals provided with
this brake. Pressurized sprays aimed at the
fan and brake hub surfaces can result in fluid
migration along the motor shaft and keyway,
and into the brake. The use of an appropri-
ate sealant such as
RTV
or a
forsheda
seal is
advised.
Operating Principle
These series contain one or more friction discs
(4) assembled alternately between the endplate
(2) friction surface, stationary disc(s) (3) and
pressure plate (also called stationary disc) (3).
The stationary disc(s) are restrained from rotat-
ing by being keyed into the endplate. With the
brake released, all disc pack components are
free to slide axially and the friction disc(s) to
rotate.
Brake release occurs when the solenoid coil
is electrically energized, causing the solenoid
plunger to travel a specified distance and
through a lever system, overcoming the pres-
sure spring force. This action releases the
clamping force on the disc pack, thereby allow-
ing the friction disc(s) and brake hub to rotate.
Brake
sets
and torque is produced when electric
current to the solenoid coil is interrupted, there-
by collapsing the solenoid magnetic field. The
solenoid plunger returns to its original de-ener-
gized position allowing the lever arm to move
forward by virtue of the compressed torque
springs. This action compresses the disc pack
components which applies a retarding torque to
the brake hub and ultimately restores the brake
to a spring-set static condition.
* This sheet includes Series 1-056,000; 1-056,100; 1-056,200;
1-056,300; 1-056,400; 1-056,500; 1-056,600 and 1-056,900.
For other series consult factory.
Tools required for installation and servicing:
3/8” hex wrench
5/16” nut driver
5/16” hex wrench
1/4” screwdriver
3/16” hex wrench
8” adjustable wrench
1-056-100
1-056-600
1-056-200
1-056-900
1-056-300
1-056-000
1-056-400
1-056-500
For replacement parts refer to sheets:
Series
Sheet Part No.
1-056-000 8-078-906-00
1-056-100 8-078-906-01
1-056-200 8-078-906-02
1-056-300 8-078-906-03
1-056-400 8-078-906-04
1-056-500 8-078-906-05
1-056-600 8-078-906-06
1-056-900 8-078-906-09
Also available at
www.stearns.rexnord.com
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