Phone: 1-800-569-1291   Fax: 1-860-693-2197

logo

146463

WCB elements are disc type, externally cooled units. They are designed to absorb and dissipate the thermal loads associated with the most severe clutch and brake applications. The WCB friction couple was developed specifically for continuous slip service and has a dynamic coefficient of friction that is greater than its static coefficient of friction. Also available, special high coefficient linings, which provide 50% higher torque than standard friction linings and provide a 1:1 dynamic to

Specifications

Size

318WCB

Dimension D24

0.93 in
24 mm

Dimension D25

1.47 in
37 mm

Dimension D29

0.250 in
6.4 mm

Dimension D46

N/A

Dimension D43

3.14 in
80 mm

Dimension G1

23.25 in
590.6 mm

Number of Bolt Holes H3

12

Number of Bolt Holes H3

3/4-10

Bolt Circle Diameter H32

21.750 in
552.4 mm

Dimension H10

11.00 in
279 mm

Dimension H133

18.250 in
463.5 mm

Dimension J1

8.50 in
216 mm

Dimension J24

23.86 in
606 mm

Number H4

6

Size H4

3/8-16 in
3/8-16 mm

Bolt Circle H4

9.125 in
231.8 mm

Single Piston Size

1/2-14

Piston Inlet Bolt Circle Diameter

15.25 in
387 mm

Minimum Bore Size

4.25 in
108 mm

Maximum Bore Size

6.13 in
156 mm

Dimension D

17.25 in
438 mm

Dimension D1

9.63 in
245 mm

Dimension D2

14.00 in
356 mm

Number of Coolant Ports (O)4

12

Coolant Port Thread Size6

1/2-14 NTP

Gear Part Number

413208

Dynamic Torque Rating7

146400 lb-in @ 80 psi
16541 Nm @ 5.5 bar

Thermal Rating8

360 hp
268 kW

Water Flow9

36 gpm
136 dm³/min

Maximum Slip Speed10

955 rpm

Maximum Freewheeling Speed11

1600

Housing (Weight)

375 lb
170 kg

Disc & Gear (Weight)

118
260

Disc & Gear (Inertia)

2.53
60

Housing (Inertia)

270 lb·ft²
11.38 kg·m²

Water Volume

185 in³
3.0 dm³

Manufacturer

Eaton-Airflex

Actuation

Air Applied

Where Used

Drilling rigs
Dynamometer
Logging equipment
Marine mooring systems
Slip clutches
Tension brakes
Unwind stands

Features

Patented piston design
Single or dual piston provides wider range of applied tension with greater control.
Drop in powerhead package
Standard single piston elements can be retrofitted with a dual piston powerhead to provide increased control.
Split wear spacers
The split wear spacers allow for wear adjustment without disassembly of the brake to minimize downtime and maintenance costs.
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.

Notes

1.00 in (25 mm) for 108WCB
1.38 in (35 mm) for 208WCB
0.857 in (4.8 mm) for 308WCB
Basic part number only. Order gear separately.

1 Tolerance Sizes 8WCB thru 24WCB
+0.000/-0.003 (+0.00/-0.08)
36WCB +0.000/-0.005 (+0.00/-0.13)
48WCB +0.000/-0.005 (+0.00/-0.13)
2 American National Standard for Unified Screw Threads
3 Tolerance +0.003/-0.000 in.(0.08/-0.00 mm)
4 Maximum diameter of “as cast” surfaces
5 American National Pipe Thread
6 American National Pipe Thread
7 Exact torque rating is dependent upon applied pressure. Maximum allowable pressure is 150 psi (10.3 bar).
8 Exact torque rating is dependent upon applied pressure. Maximum allowable pressure is 150 psi (10,3 bar).maximum allowable outlettemperatures are 150ºF (65ºC) for fresh water; 165ºF (74ºC) for 70/30 and 60/40 water glycol mixes; and 170ºF (77ºC) for 50/50 water glycol mixes.
9 To insure proper cooling, inlet port must be at the six o’clock position. Flow rates shown are for fresh water, flow rates for water glycol mixes must increase to achieve the ratings in the Thermal Rating column. Maximum allowable inlet pressure – 65 psi
10 Based upon a continuous slip velocity of 4500 fpm (22.9 mps).
11 Maximum freewheeling velocity is 7500 fpm (38.1 mps).