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146245

WCS Disc Brake Elements

Element construction and operation is illustrated in the figure. Pressurizing the unit compresses the brake springs and withdraws the water jackets from the brake discs. Heat generated at the friction interfaces is quickly transferred to the circulating coolant.

Element sizes are indicated by the number of friction discs and the disc diameter in inches. For instance, size 224WCS has two friction discs 24 inches in diameter.

Specifications

Size

208WCS

Dimension D24

0.81 in
21 mm

Dimension D25

1.25 in
32 mm

Dimension D29

0.250 in
6.4 mm

Dimension D46

N/A

Dimension D43

2.56 in
65 mm

Dimension G1

12.125 in
308.0 mm

Dimension H10

4.12 in
105 mm

Dimension H13

8.375 in
212.7 mm

Dimension J1

3.12 in
79 mm

Dimension J2

12.24 in
311 mm

Inlet Port Thread Size O22

3/8/2018

Inlet Bolt Circle Diameter

6.63 in
168 mm

Minimum Bore Range3

1.63 in
41 mm

Maximum Bore Range4

2.50 in
64 mm

Dimension D1

4.00 in
102 mm

Dimension D

9.78 in
248 mm

Dimension D2

9.25 in
235 mm

Number of Coolant Ports O5

6

Coolant Port Thread Size

3/8-18 NPT

Gear Port Number

415314

Torque Rating

10000 lb·in
1129 Nm

Release Pressure

80 psi
5.5 bar

Thermal Rating6

60 hp
44.7 kW

Water Flow Rate7

6 gpm
22.7 dm³/min

Housing Inertia

12 lb·ft²
0.51 kg·m²

Disc Gear Weight

1247566

Disc Gear Inertia

10913.653244.3

Maximum Slip Speed8

2150 rpm

Maximum Free Wheeling Speed9

3400

Housing Weight

116 lb
53 kg

Water Volume

0.3924

Manufacturer

Eaton-Airflex

Actuation

Spring Applied, Air Release

Where Used

Logging Equipment
Marine Mooring Systems
Drilling rigs

Features

Unique friction couple.
A specially formulated friction material, interfacing with a copper alloy surface, eliminates the stick-slip characteristic associated with ordinary frictional devices.
Rapid heat dissipation.
The copper interface conducts heat rapidly to the circulating coolant.
Open or closed loop coolant systems.
The element works equally well with open or closed loop circulating systems. On mobile equipment, the engine’s cooling system can be tapped to provide coolant to the element.
Optional corrosion protection
For marine environment applications, protective coatings are available to minimize corrosion.

1 Tolerance Sizes 8WCS thru 24 WCS +0.000/0.003 (+0.00/-0.08) 36WCS +0.000/-0.005 (+0.00/-0.13)
2 American National Pipe Thread.
3 Maximum bore sizes are based on flat keys, allow able gear hub stresses and torque ratings with a full complement of springs.
4 Maximum bore sizes are based on flat keys, allow able gear hub stresses and torque ratings with a full complement of springs.
5 American National Pipe Thread.
6 Based upon a 70 ºF (21 ºC) fresh water inlet temperature and a 50 ºF (28 ºC) temperature rise between inlet and outlet. See cooling requirements.
7 To insure proper cooling, inlet port must be located at the six o’clock position. Maximum allowable inlet pressure is 45 psi (3.1 bar).
8 Based upon a continuous slip velocity of 4500 fpm (22.9 mps).
9 Maximum freewheeling velocity is 7500 fpm (38.1 mps)