The Rowland Company
4900 North 20th Street
Philadelphia, PA 19144
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All Categories > Clutches and Brakes > Tension Brakes > Airflex® Water Cooled Brakes > WCS Disc Brake Elements > Item # 146376  


Item # 146376, WCS Disc Brake Elements

WCS elements are disc type, externally cooled, spring applied units. They are designed to absorb and dissipate the thermal loads associated with the most severe braking and tensioning applications. The WCS friction couple was developed specifically for continuous slip service and has a dynamic coefficient of friction which is larger than its static coefficient of friction. Special high coefficient linings are also available which provide 50% higher torque than standard friction linings and provide a 1:1 dynamic to static torque ratio.





Specifications  · General Description  · Features  · Where Used  · Note

Specifications

Size
308WCS

Dimension D24
0.81 in
21 mm

Dimension D25
1.25 in
32 mm

Dimension D29
0.250 in
6.4 mm

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
3/8-18

Inlet Bolt Circle Diameter
6.63 in
168 mm

Minimum Bore Range3
1.88 in
48 mm

Maximum Bore Range4
2.31 in
59 mm

Dimension D1
7.75 in
197 mm

Dimension D
12.34 in
313 mm

Dimension D2
11.81 in
300 mm

Number of Coolant Ports (O)5
8

Coolant Port Thread Size
3/8-18 NPT

Gear Part Number
416457

Torque Rating
13950 lb·in
1576 Nm

Release Pressure
80 psi
5.5 bar

Thermal Rating6
90 hp
67 kW

Water Flow Rate7
9 gpm
34.1 dm³/min

Housing (Inertia)
15 lb·ft²
0.64 kg·m²

Disc & Gear (Weight)
365
805

Disc & Gear (Inertia)
1.5
14
3.4
86

Maximum Slip Speed8
2150 rpm

Maximum Freewheeling Speed9
3400

Housing (Weight)
121 lb
55 kg

Water Volume
0.6
36

Manufacturer
Eaton-Airflex

Actuation
Spring Applied, Air Release
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)


General Description
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.


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.


Where Used
  • Logging Equipment
  • Marine Mooring Systems
  • Drilling rigs


Note
Contact factory for dimensions.