Products Catalog
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 tomore
Unit of Measure

Specifications

Size

 336WCBEP

Dimension D24

 1.52 in39 mm

Dimension D25

 2.58 in65 mm

Dimension D29

 0.280 in7.1 mm

Dimension D46

 2.38 in60 mm

Dimension D43

 4.97 in126 mm
Dimension G1 44.498 in1130.2 mm

Number of Bolt Holes H3

 16

Bolt Hole Size H3

 1 3/8-6
Bolt Circle Diameter H32 41.500 in1054.1 mm

Dimension H10

 16.50 in419 mm
Dimension H133 18.375 in932.1 mm

Dimension J1

 16.50 in419 mm
Dimension J24 44.86 in1139 mm

Number H4

 6

Size H4

 1/2-13 in1/2-13 mm

Bolt Circle H4

 14.500 in444.5 mm

Single Piston Size

 3/4-14

Piston Inlet Bolt Circle Diameter

 28.00 in711 mm

Minimum Bore Size

 7.750 in197 mm

Maximum Bore Size

 11.75 in298 mm

Dimension D

 27.48 in698 mm

Dimension D1

 13.00 in330 mm

Dimension D2

 22.30 in566 mm
Number of Coolant Ports (O)5 12
Coolant Port Thread Size6 1 1/4 SAE ORB

Gear Part Number

 416535
Dynamic Torque Rating7 885000 lb-in @ 80 psi 99992 Nm @ 5.5 bar
Thermal Rating8 2340 hp1744.9 kW
Water Flow9 234 gpm885.8 dm³/min
Maximum Slip Speed10 475 rpm
Maximum Freewheeling Speed11 700

Housing (Weight)

 4350 lb1973 kg

Disc & Gear (Weight)

 1240 562

Disc & Gear (Inertia)

 1010 42.56

Housing (Inertia)

 7724 lb·ft²325.49 kg·m²

Water Volume

 1670 in³27.4 dm³

Manufacturer

 Eaton-Airflex

Actuation

 Air Applied

Where Used

N/A

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

Features

N/A 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.

Note

N/A 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).