Stearns 1-056-X00 User Manual

®		P/N 8-078-905-60
	Spring-Set Disc Brakes	effective 03/16/06

														For replacement parts refer to sheets:
	Installation and Service Instructions
														Series	Sheet Part No.
														1-056-000	8-078-906-00
	for 1-056-X00* Series (all revisions)													1-056-100	8-078-906-01
														1-056-200	8-078-906-02
														1-056-300	8-078-906-03
	Manual Adjust Brakes
														1-056-400	8-078-906-04
														1-056-500	8-078-906-05
	*This sheet includes Series 1-056,000; 1-056,100; 1-056,200;
														1-056-600	8-078-906-06
	1-056,300; 1-056,400; 1-056,500; 1-056,600 and 1-056,900.
														1-056-900	8-078-906-09
	For other series consult factory.
														Also available at www.rexnord.com
	1-056-100
	1-056-
			600										a) Wear a filtered mask or a respirator
						1-056-000							while removing dust from the inside
						1-056-400							of a brake.
						1-056-500							b) Use a vacuum cleaner or a soft
													brush to remove dust from the
	1-056-200
													brake. When brushing, avoid caus-
	1-056-			900
													ing the dust to become airborne.
													Collect the dust in a container, such
													as a bag, which can be sealed off.
													10. Caution! While the brake is
	1-056-300												equipped with a manual release to
													allow manual shaft rotation, the
								Tools required for installation and servicing:
								3/8” hex wrench	5/16” nut driver				motor should not be run with the
													manual release engaged, to avoid
								5/16” hex wrench	1/4” screwdriver
													overheating the friction disc(s).
								3/16” hex wrench	8” adjustable wrench
												General Description

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/liability, contact Rexnord Industries, LLC, Stearns Division,5150 S. International Dr., Cudahy, WI 53110, [phone].

Caution

1.Installation and servicing must be made in compliance with all local safety codes including Occupational Safety and Health Act (OSHA). All wiring and electrical connections must comply with the National Electric Code (NEC) and local electric codes in effect.

2.Do not operate the brake in atmospheres containing explosive gases or dusts.

3.To prevent an electrical hazard, disconnect 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.

4.Make certain power source conforms to the requirements specified on the brake nameplate.

5.Be careful when touching the exterior of an operating brake. Allow sufficient time for brake to cool before disassembly. Surfaces may be hot enough to be painful or cause injury.

6.Do not operate brake with housing removed. All moving parts should be guarded.

7.Installation and servicing should be performed only by qualified personnel familiar with the construction and operation of the brake.

8.For proper performance and operation, only genuine Stearns parts should be used for repairs and replacements.

9.After usage, the brake interior will contain burnt and degraded friction material dust. This dust must be removed before servicing 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.

These series of brakes are spring-set, electrically released. They contain one or more rotating friction discs (4) driven by a hub (16) mounted on the motor or other shaft.

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 rotating 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 pressure spring force. This action releases the clamping force on the disc pack, thereby allowing the friction disc(s) and brake hub to rotate.

Brake sets and torque is produced when electric current to the solenoid coil is interrupted, thereby collapsing the solenoid magnetic field. The solenoid plunger returns to its original de-energized 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.

BRAKE MOUNTING (Manual Adjust) 1-056-X00

Place hub on motor shaft.	Position hub on shaft as shown.	Tighten set screws to motor shaft.
	.188”
	(4.77mm)

		Remove brake housing.					Slide endplate over hub noting position
							of stabilizer clips, if used.
		Housings vary by series number.					(Refer to Friction Disc
		See page 1.					Replacement, view 3 and 3A.)
							Tighten mounting screws.
		counter-
		clockwise
									*For vertical assembly of 20 &
									25lb-ft brakes, refer to page 3.
					Replace brake housing and tighten to torque specified below:
		Connect coil leadwires to
		power supply. Refer to
		nameplate for voltage rating.*
							Brake series	Torque
		Caution: Keep wiring away
						1-056-000 1-056-300		8 lb-in
		from pinch points and moving
						1-056-400 1-056-500
		components.
						1-056-100 1-056-200		12 lb-in
						1-056-600 1-056-900

clockwise

*For DC voltages see sheet 8-078-950-00.

FRICTION DISC REPLACEMENT SERIES 1-056-X00

	Remove support plate screws and		Remove and discard old friction disc.	Install new friction disc(s) and
				stationary disc(s) as shown.
	lift support from brake
				For brakes
				with vertical
	counter-			springs see
	clockwise			Figure 5A
				or 5C.
				WRONG
	3A		Reposition support plate on endplate and
			tighten mounting screws to 55 lb-in.

single disc units only. Position clips opposite set screw holes.

clockwise

Note: Friction discs can wear to 1/2 their original thicknes, or .093”

2