Warner Electric ERD–Electrically Released Brakes User Manual

Page 5

Warner Electric • 800-825-9050

819-0453

Options

• Manual Release - This option is recommend-

ed in applications where the brake needs to
be released by hand. This is ideal for gradu-
ally and safely lowering suspended loads in
the event of a power failure. Note: This option
requires magnet VAR 2.

• Dust Cover - This option is recommended for

use in environments which cannot be con-
taminated with brake friction dust and in
harsh dust, dirt, and humidity environments
where the brake is in danger from the con-
taminants.

• Friction Disc Carrier - Sizes 5 and 10 are

available with an optional synthetic material
carrier. Metallic disc carriers are standard for
all sizes.

• Friction Flanges - A friction flange is to be

mounted to the machine or motor frame if its
surface does not meet these specifications:
1. Cast iron or steel material
2. Hardness 150 HB
3. Smooth to 125 microinch
4. Flat to .002 inches

A friction flange is required if all of the specifica-
tions are not met. The correct flange is:

Thin friction flange

Used where surface is machined but unsuitable
for friction (eg. aluminum). Used in conjunction
with "Long screw kit". Only available through
size ERD 35 due to potential distortion with fric-
tional heat input.

Thick friction flange

Used in the absence of a suitable machined
mounting surface.

Mounting Screw Kits:

1. Short Screw Kit - supplied with the thick

flange for mounting on the external diameter
threaded holes.

2. Long Screw Kit - supplied with the thin flange

for mounting through the flange on the exter-
nal diameter holes. Can also be ordered sep-
arately for direct mounting without a flange.

Dust Cover

Airgap Adjustment
Spacer Screws

Friction

Disc Carrier

Holding Screws

Central Nut (VAR 2)

Hub

Magnet Assembly

Figure 1

ERD Brake Components

Figure 4 - Hand Release Lever Mounting

ERD

Release

Size

Angle

3.86

2.09

0.67

3.46

.040

4.21

2.44

0.71

4.17

.040

5.08

2.99

0.98

5.20

.040

5.47

3.39

0.87

5.98

.050

7.44

4.09

1.57

6.54

.050

100

8.07

4.72

1.73

7.36

.050

170

9.57

5.51

2.09

8.78

.050

300 12.32

6.38

2.40

10.33

.050

Release Angle