COMPANY HEADER
The Water Cooled Brake (WCB) is a high-energy absorbing solution used for dynamic tensioning. The design of the internal water passages and copper alloy wear plates allow for excellent heat dissipation. The WCB is well-suited for applications where a heavy-duty continuous slip is needed, such as drawworks, mooring winches, dynamometers, paper converting, uncoilers, and yarders.
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Water Cooled Brakes

8240 Newton Meter (N·m) High Coefficient Torque Rating Spring-Released Water Cooled Brake
Water Cooled Brakes

16500 Newton Meter (N·m) High Coefficient Torque Rating Spring-Released Water Cooled Brake
Water Cooled Brakes

24700 Newton Meter (N·m) High Coefficient Torque Rating Spring-Released Water Cooled Brake
Water Cooled Brakes

32900 Newton Meter (N·m) High Coefficient Torque Rating Spring-Released Water Cooled Brake
Water Cooled Brakes

21900 Newton Meter (N·m) High Coefficient Torque Rating Spring-Released Water Cooled Brake
Description N/A WPT® Water Cooled Brakes (WCB) are a high energy absorbing solution used for dynamic tensioning. The design of the internal water flow and copper alloy wear plates allow for excellent heat dissipation. WCB’s are well suited for applications where a heavy-duty continuous slip tensioning is needed such as drawworks, mooring winches, dynamometers, paper converting, uncoilers and yarders.
Brands N/A WPT®
Type N/A Spring-Released
Medium Coefficient Torque Rating N/A 47200 lbf·in5330 N·m N/A 94300 lbf·in10700 N·m N/A 142000 lbf·in16000 N·m N/A 189000 lbf·in21300 N·m N/A 126000 lbf·in14200 N·m
High Coefficient Torque Rating N/A 72900 lbf·in8240 N·m N/A 146000 lbf·in16500 N·m N/A 219000 lbf·in24700 N·m N/A 292000 lbf·in32900 N·m N/A 194000 lbf·in21900 N·m
Note for Torque Rating N/A Pneumatic Rated Actuator Pressure: 100 psi (7 bar) All sizes Pneumatic Max Actuator Pressure: 130 psi (9 bar) All sizes
Hydraulic Rated Actuator Pressure: 18" = 330 psi (23 bar), 24" = 380 psi (26 bar), 36" = 410 psi (28 bar)
Hydraulic Max Actuator Pressure: 18" = 430 psi (30 bar), 24" = 490 psi (34 bar), 36" = 530 psi (37 bar)
Torque is directly proportional to the actuator pressure applied.
Low Coefficient and Extra-High Coefficient Friction Material offerings are available.
Heat Dissipation Capacity N/A 144 hp107 kW N/A 290 hp216 kW N/A 430 hp321 kW N/A 580 hp433 kW N/A 325 hp242 kW
Minimum Freshwater Flow N/A 14.4 gpm54.5 L/min N/A 29 gpm110 L/min N/A 43 gpm163 L/min N/A 58 gpm220 L/min N/A 32.5 gpm123 L/min
Note for Heat Dissipation Capacity and Minimum Freshwater Flow N/A Flow and heat dissipation ratings are for parallel water flow through the jackets. Rated heat dissipation requires a freshwater flowrate of 1 gpm for every 10 hp (one liter per minute for every 2 kW) and are based upon a 50ºF (28ºC) temperature rise between the inlet and outlet. The outlet water temperature should not exceed 170ºF (77ºC). Maximum static inlet water pressure is 45 psi (3.1 bar) for the 18"/24"and 40 psi (2.8 bar) for the 36". Maximum dynamic inlet / outlet water pressure is 60 psi (4.1 bar) / 20 psi (1.4 bar) for all sizes. Ethylene Glycol is the recommended coolant additive. At 50% concentration in water, the required flowrate is 1.5 times the freshwater flowrate, due to the reduced specific heat of the solution. Seawater may be used as a coolant, with the same flow characteristics as with freshwater, and purging with freshwater after each use.
Maximum Free-Wheel Speed N/A 1910 rpm N/A 1910 rpm N/A 1910 rpm N/A 1910 rpm N/A 1450 rpm
Maximum Slip Speed N/A 1270 rpm N/A 1270 rpm N/A 1270 rpm N/A 1270 rpm N/A 970 rpm
Total Weight N/A 400 lb180 kg N/A 590 lb270 kg N/A 800 lb360 kg N/A 990 lb450 kg N/A 840 lb380 kg
Hub and Drive Plate (DP) Weight N/A 88 lb40 kg N/A 180 lb80 kg N/A 280 lb130 kg N/A 350 lb160 kg N/A 200 lb89 kg
Hub and Drive Plate (DP) Inertia N/A 21 lb·ft²0.88 kg·m² N/A 42 lb·ft²1.8 kg·m² N/A 66 lb·ft²2.8 kg·m² N/A 84 lb·ft²3.5 kg·m² N/A 79 lb·ft²3.3 kg·m²
Dimension - A1 N/A 23.250 in590.55 mm N/A 23.250 in590.55 mm N/A 23.250 in590.55 mm N/A 23.250 in590.55 mm N/A 29.998 in761.95 mm
Dimension - A Tolerance N/A +0.000 in-0.003 in+0.00 mm-0.08 mm
Hole Circle (B) N/A 22.00 in558.8 mm N/A 22.00 in558.8 mm N/A 22.00 in558.8 mm N/A 22.00 in558.8 mm N/A 28.75 in730.3 mm
Diameter (B) N/A 21/32 in16.7 mm
Quantity2 N/A 10
Dimension - C N/A 18.250 in463.55 mm N/A 18.250 in463.55 mm N/A 18.250 in463.55 mm N/A 18.250 in463.55 mm N/A 24.375 in619.13 mm
Dimension - C Tolerance N/A +0.000 in-0.003 in+0.00 mm-0.08 mm
Thread Size P N/A 1/2 N/A 1/2 N/A 1/2 N/A 1/2 N/A 3/4
Thread Type N/A National Pipe Thread (NPT)
Dimension - D N/A 23-5/8 in600.1 mm N/A 23-5/8 in600.1 mm N/A 23-5/8 in600.1 mm N/A 23-5/8 in600.1 mm N/A 30-5/8 in777.9 mm
Dimension - E N/A 9-3/4 in247.3 mm N/A 13-1/8 in331.8 mm N/A 17-3/8 in441.3 mm N/A 21-5/8 in548.6 mm N/A 11-1/4 in284.2 mm
Minimum Bore Range3 N/A 2.25 in57.2 mm N/A 2.25 in57.2 mm N/A 2.25 in57.2 mm N/A 2.25 in57.2 mm N/A 2.75 in69.9 mm
Maximum Bore Range4 N/A 5.34 in135.7 mm N/A 5.34 in135.7 mm N/A 5.34 in135.7 mm N/A 5.34 in135.7 mm N/A 7.00 in177.8 mm
Features N/A
  • Available in air or hydraulic actuation and hydraulic release
  • Clutch configurations available
  • Spring-applied with hydraulic or pneumatic release available
  • Dual hydraulic or pneumatic actuation is available
  • Available with a Full Marine Corrosion Protection package
  • Type approval certifications available in DNV and ABS
  • Standard mounting hole pattern for OEM applications, rebuilds, or retrofits
  • O-ring water jacket design allows for fast, easy field service
  • Full Marine Corrosion Package available
Note N/A Contact WPT® Power for final selection, product flexibility, application guidance and approval. Certified prints available on request. Dimensions and Specifications are considered as reference only and subject to change.
  • 1 36” brakes: +0.000/-0.005 (+0.00/-0.13)
  • 2 18” and 24” brakes have (10) mounting holes based on a (12) hole pattern. 36” brakes have (14) mounting holes based on a (16) hole pattern. (2) holes omitted for coolant inlets/outlets
  • 3 Maximum bores shown are with a standard square key. Contact WPT® Power for bore sizes exceeding those shown.
  • 4 Maximum bores shown are with a standard square key. Contact WPT® Power for bore sizes exceeding those shown.