Warner Electric ER Series Brakes

Dynamic Engagement Brakes

ER brakes provide a permanent magnet engage/electrically released design. This brake must be engaged while the shaft is in motion. Shaft speed should be 100 RPM or greater when the brake is engaged. This style brake offers a bulkhead flange mounting system, the highest torque rating offered by Warner Electric in the power released series, high cycle rate capability, and excellent life.

Features:
• Designed for dynamic stopping operations
• High cycle rated capability
• Inside or Outside mount options for 475 or 650 sizes
• Normal or Heavy Duty options available in larger sizes

ER Series brakes are available in five sizes . Static torque ratings range from 10.5 lb.ft. to 400 lb.ft

Selection Procedure
Verify that the brake will be cycled frequently in normal operation. Determine the horsepower and speed at the brake location.

ER Series Electrically Released Brakes
Product Data – Reference (Pages A-8 to A-11) in catalog P-8590

Model Voltage DC Max. RPM Bore Size
ER-375 90V 5000 .500″ & .625″
ER-475 90V 4500 .500″ to 1.000″
ER-650 90V 3600 .500″ to 1.375″
ER-825 ND 90V, 24V 3600 .500″ to 1.625″
ER-825 HD 90V, 24V 3600 .500″ to 1.500″
ER-1225 ND 35-75V 3000 .937″ to 3.00″
ER-1225 HD 35-75V 3000 .75″ to 2.687″

Component Parts

ER-375 ER-475 ER-650
Description Part No.  Part No.  Part No.
†Bushing 180-0410-0418 180-0421-0435
(1/2″ to 1″ Bore) (1/2″ to 1-3/8″ Bore)
Hub 540-0849 540-0848
1/2″ Bore 540-0846
5/8″ Bore 540-0847
Magnet And Armature (Inside Mounted, 90V)
Sold only in matched pairs* 5255-5 5256-6
Autogap Accessory 5391-101-003 5392-101-003
Terminal Accessory 5103-101-002 5103-101-002
Magnet And Armature (Outside Mounted, 90V)
Sold only in matched pairs* 5254-1 5255-6 5256-7
Autogap Accessory 5390-101-002 5391-101-003 5392-101-003
Terminal Accessory 5103-101-002 5103-101-002 5103-101-002
Mounting Accessory
Inside Mount 5255-101-001 5256-101-003
Outside Mount 5254-101-002 5255-101-002 5256-101-003
Conduit Box 5200-101-010 5200-101-010 5200-101-010

Component Parts

ER-825 Normal Duty ER-825 Heavy Duty ER-1225 Normal Duty ER-1225 Heavy Duty
Description Part No. Part No. Part No. Part No.
†Bushing 180-0137-180-0149 180-0008-180-0018 180-0262-180-0295 180-0026-180-0057
7/8″ to 1-5/8″ Bore 7/8″ to 1-1/2″ Bore 15/16″ to 3″ Bore 3/4″ to 2-11/16″ Bore
Armature Hub 540-0394 540-0015
Splined Hub 540-0057 540-0064
Retainer Ring 748-0006 748-0005
Mounting Accessory, I.M. 5321-101-001 5321-101-001 5321-101-001 5321-101-001
Magnet (I.M.) and armature 24V 5250-31 5250-26
Sold only in matched pairs* 90V 5250-30 5250-25 5252-9 5252-4
Terminal Accessory 5311-101-001 5311-101-001 5311-101-001 5311-101-001
Autogap Accessory 5201-101-008 5201-101-008
Conduit Box 5200-101-010 5200-101-010 5200-101-010 5200-101-010

Click on the link below to see Drawings and Specs:
ER-Series-Breaks.pdf