Motor Brakes, Spring Applied Brakes, Clutch Brake Discs.

Products
ELECTROMAGNETIC SPRING-APPLIED FAILSAFE SAFETY BRAKES.

*** Electromagnetic spring-release fail-safe brakes
Asbestos-free dual-surface reliability, Low wear rate, Stable & rugged, Simple adjustment of braking torque & Setting of air-gap, Wide variety of accessories to suit most stringent & demanding applications.
Application :- Cranes & variety of material handling & Storage equipments. Brake motors, Forklift & AGVs gate & door drives, Textile machinery.
Torque :- 1.5 N-m to 800 N-m (std.) Sp. Versions for upto 6300 N-m

VORTEX ENGINEERING WORKS manufacture a wide range of electromagnetic spring-applied failsafe safety brakes to suite the demands of the modern day application.

Type ERD

1. GENERAL

ERD series fail-safe brake is an electromagnetic actuated dual-surface spring applied brake for dry operation. The braking force is applied by the springs and neutralized through the electromagnetic force.
ERD spring-applied brakes are successfully working in the most demanding applications and are used wherever rotating masses must be stopped or shafts must be held in a precise position.
High material quality together with the machining accuracy of modern machines and the uncompromising process inspections and functional tests guarantee reliability and safety.
On request we adapt our ERD fail-safe brake to your structural and electric requirements. For more information please contact our specialists.

2. CONSTRUCTION FEATURES

Special features are

a. Asbestos-free friction linings, that guarantee safe braking even under extreme condition.
b. Braking torque adjustment from 1.0…0.5. Rated Torque.
c. Clearance adjustment ensures easy mounting & adjustment after wear without dismantling.
d. Stable, rugged connecting cable
e. Effective surface protection
f. Insulation class B, on request F
g. Subsequent fitting of hand release
h. Unlimited on period
i. Surface-hardened armature discs ensure low wear and provide rust protection (up to size ERD 05)

3. FIELD OF APPLICATION

ERD fail-safe brakes are employed in numerous applications; some of which are on listed below :

a. Cranes & Matl. Handling equipment
b. Forklift trucks and AGVS
c. Gate and door drives
d. Vehicles for handicapped persons
e. Brake motors
f. Storage automation
g. Textile weaving looms for holding the jacquard
h. Textile spinning machinery
i. Stage equipment and machinery
j. Shipping industry for ship building machinery
k. Elevators and Escalators
l. Industrial robots
m. Modern human driven industrial material handling vehicles.

4. FUNCTIONAL DESCRIPTION

The brake is designed to assure, by means of the pressure springs and when no voltage is applied the intrinsic safety. On exciting the electromagnet by means of the current, the armature plate is pulled towards the electromagnet it self, then loading the pressure springs and enabling the disc which is axially movable, on the hub, to turn freely.
When the current fails, the pressure springs drive the armature plate towards the disc, thus braking the motor shaft.

5. AIR-GAP ADJUSTMENT

Make the air-gap adjustment by rotating the adjuster nut, after loosening the fixing screws, gap is adjusted after a normal operation, allow for a cooling down period.
The ideal air-gap is 0.2 mm (+0.05, -0). The maximum acceptable air-gap value is 0.7 mm. If this value is exceeded, the brakes performance will vary, incorrect maintenance of the air-gap adjustment will prevent brake from braking.

6. MOUNTING INSTRUCTIONS

ERD Fail safe brakes are fastened with the fixing screws. With loosened screws and in current less condition the air-gap is adjusted with the aid of feeler gauge to the nominal size, according to the table. After a uniform adjustment the screws are tightened and the brake is ready for operation.

The wear caused by the dynamic braking results in an enlargement of the air gap. Only regular checks and adjustments of air gap; guarantee the functioning of the brake. Never should it be allowed to have the air gap less than the minimum possible friction thickness.

A hand release can be fitted to the brake subsequently. Important for that is the mounting bolt. A wrong adjustment can lead to the loss of the braking effect; especially when the braking torque is reduced or the magnet is excited by over voltage.

Ex factory, the braking torque is adjusted to the nominal torque of brake specified. Twisting the adjustment ring results in braking changes accordingly.

Grease and oil must be kept away from the friction surfaces