Dings 70 Series - User Manual

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

Summary

70 Series Hazardous Brake Instructions

Brake Description and Operation

Direct acting, electromagnetically released, spring set unit with disc contact for braking.

Installation Cautions

Do not operate manual release or energize coil before installation. Use specific hubs. Do not operate with cover removed.

Manual Release Procedure

Push in release knob and rotate counterclockwise to release. Push and turn clockwise or restore power to reset.

Thermal Release Mechanism

Releases brake when overheated to prevent ignition. Reset by cooling, pushing knob, and rotating clockwise.

Safety Warnings and Operation

General Safety Warnings

Failure to comply cancels warranties and may cause injury or damage. Read bulletin carefully.

Brake Description Overview

70 Series brake for hazardous locations, electromagnetically released, spring set unit with thermal overload mechanism.

Operating Information for Thermal Release

Explains thermal overload mechanism operation and its effect on brake control during overheating.

Brake Performance and Selection Factors

Brake Torque Considerations

Brake torque matched to motor torque, often with a safety factor. Exact calculation methods vary.

Thermal Capacity Explained

Capacity to perform stops without excessive heat buildup, affecting thermal overload actuation.

Electrical Power Supply Requirements

Voltage tolerance affects coil life and operation; deviations outside +/- 10% are critical.

Handling Unusual Operating Conditions

Consult office for ambient temps > 40°C, speeds > 3600 RPM, or other uncommon circumstances.

Installation Procedures

Motor Endshield Installation

Instructions for mounting the brake directly onto the motor endshield, including hub and cover installation.

Adapter on Motor Endshield Installation

Steps for installing the brake using an adapter on the motor endshield, focusing on alignment.

Foot Mounting Brake Installation

Detailed steps for installing the brake using a foot mounting bracket, including alignment checks.

Brake Adjustment and Maintenance

Wear Adjustment Procedure

How to adjust the magnet gap as friction discs wear to maintain optimal performance.

Torque Adjustment

Procedure for adjusting the length of torque springs to set the desired torque rating.

Friction Disc Replacement

Step-by-step guide for removing and replacing friction discs within the brake assembly.

Magnet Coil Replacement

Instructions for safely removing and installing replacement magnet coils, including shading coils.

Troubleshooting and Specifications

Brake Troubleshooting Guide

Common issues like brake not releasing or stopping, and chattering/humming with solutions.

Product Specifications

Details on NEMA frames, available voltages, frequencies, and torque ratings for the 70 Series brake.

Ordering Information

Information required when ordering replacement parts or a new brake unit.

Warranty Information

Details on the product warranty, limitations, and seller's obligations.

Dings 70 Series Specifications

General

Brand	Dings
Model	70 Series
Category	Industrial Equipment
Language	English