70 Series Hazardous
Brake Instructions
DESCRIPTION
The 70 Series Brake is a direct acting, electro magnetically released, spring set unit that utilizes rotating and stationary
disc contact to supply positive braking action with quick release and setting capabilities at all times. Brakes which are
not provided with a floor mounting bracket are intended to be mounted as an integral part of electric motors listed for
corresponding hazardous locations where the acceptability of the combinations has been determined by Underwriter’s
Laboratories, Inc. The explosion-proof assembly is completed by assembly of the brakes to the motors.
READ THIS BULLETIN CAREFULLY BEFORE INSTALLING OR OPERATING THE
70 SERIES BRAKE. FAILURE TO COMPLY WITH THESE INSTRUCTIONS CANCELS
ALL WARRANTIES SINCE THE SAFETY OF THE UNIT MAY BE ENDANGERED BY
IMPROPER INSTALLATION OR OPERATING PROCEDURES.
Bulletin No. BK4606 (8/07)
4740 WEST ELECTRIC AVENUE
MILWAUKEE, WI 53219
PHONE 414/672-7830
FAX 414/672-5354
www. dingsco.com
MOTOR MOUNTED*
FOOT MOUNTED
MODEL
MODEL
NO.
Torque
NO.
Torque
R71010-9
10 lb. ft.
FR71010-9
10 lb. ft.
R71015-9
15 lb. ft.
FR71015-9
15 lb. ft.
R72025-9
25 lb. ft.
FR72025-9
25 lb. ft.
R73035-9
35 lb. ft.
FR73035-9
35 lb. ft.
R74050-9
50 lb. ft.
FR74050-9
50 lb. ft.
R75075-9
75 lb. ft.
FR75075-9
75 lb. ft.
*If a hazardous location brake is purchased by other than an
authorized electric motor manufacturer, a Foot Mounted brake
must be purchased to obtain the UL label.
CAUTION
DO NOT OPERATE MANUAL RELEASE
OR ENERGIZE BRAKE COIL BEFORE
INSTALLATION IN ORDER TO PRESERVE
PRE-ALIGNMENT OF ROTATING DISCS
FOR EASE OF INSTALLATION.
USE ONLY HUB FURNISHED BY DINGS
SPECIFICALLY FOR USE IN HAZARDOUS
LOCATION BRAKES. DO NOT OPERATE
BRAKES IN EXPLOSIVE ATMOSPHERE
WITH COVER OR COVER BOLTS
REMOVED.
MANUAL RELEASE (See Figure 1)
To manually release brake, push in release knob and rotate
counterclockwise until strikes stop-pin. Brake will remain
released until release knob is pushed in and turned clockwise
or until power is restored, automatically resetting the brake.
THERMAL RELEASE
If the brake overheats, the thermal release mechanism will release
spring pressure on the friction discs, releasing brake. To reset ther-
mal release, allow brake to cool, then push in release knob (17)
and rotate clockwise until it strikes the stop-pin. Check brake
operation as overheating may indicate a broken lead wire or
burned out coil.
The thermal release mechanism has been calibrated at the factory
and the setting of the bimetal element and control rod MUST
NOT BE DISTURBED. If the mechanism does not function
properly, the complete pressure plate assembly (9), complete
magnet plate assembly (3), release gears (34) and items 31
through 50 must be returned to the factory for adjustments.
G060629-006
Figure 1.
Table 1. List of Models
