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146272

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

336WCS

Dimension D24

1.52 in
39 mm

Dimension D25

2.58 in
65 mm

Dimension D29

0.280 in
7.1 mm

Dimension D46

2.38 in
60 mm

Dimension D43

4.88 in
124 mm

Dimension G1

44.498 in
1130.2 mm

Dimension H10

16.50 in
419 mm

Dimension H13

18.375 in
466.7 mm

Dimension J1

16.50 in
419 mm

Dimension J2

45.01 in
1143 mm

Inlet Port Thread Size O22

3/4/2014

Inlet Bolt Circle Diameter

28.00 in
711 mm

Minimum Bore Range3

7.25 in
184 mm

Maximum Bore Range4

10.88 in
276 mm

Dimension D1

13.00 in
330 mm

Dimension D

25.33 in
643 mm

Dimension D2

24.02 in
610 mm

Number of Coolant Ports O5

8

Coolant Port Thread Size

1 1/4 SAE ORB

Gear Port Number

416539

Torque Rating

781000 lb·in
88175 Nm

Release Pressure

80 psi
5.5 bar

Thermal Rating6

1950 hp
1454.1 kW

Water Flow Rate7

195 gpm
738.2 dm³/min

Housing Inertia

7724 lb·ft²
325.49 kg·m²

Disc Gear Weight

0.063

Disc Gear Inertia

11.8135330057.02

Maximum Slip Speed8

475 rpm

Maximum Free Wheeling Speed9

700

Housing Weight

4298 lb
1949 kg

Water Volume

167027.44

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)