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The Copper Water Cooled (CWC) brake is designed for maximum heat transfer in a small package. The CWC is perfect for tension control equipment, coil processing, paper mill unwinding stands, and large inertia stops. The air tube actuator allows for smooth torque transitions while delivering peak performance.
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Copper Water Cooled Brakes

1820 Newton Meter (N·m) Medium Coefficient Pneumatic Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure Copper Water Cooled Brake
Copper Water Cooled Brakes

3640 Newton Meter (N·m) Medium Coefficient Pneumatic Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure Copper Water Cooled Brake
Copper Water Cooled Brakes

5460 Newton Meter (N·m) Medium Coefficient Pneumatic Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure Copper Water Cooled Brake
Copper Water Cooled Brakes

4150 Newton Meter (N·m) Medium Coefficient Pneumatic Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure Copper Water Cooled Brake
Copper Water Cooled Brakes

8290 Newton Meter (N·m) Medium Coefficient Pneumatic Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure Copper Water Cooled Brake
Description N/A The Copper Water Cooled (CWC) brake is designed for maximum heat transfer in a small package. The CWC is perfect for tension control equipment, coil processing, paper mill unwinding stands, and large inertia stops. The air tube actuator allows for smooth torque transitions while delivering peak performance.
Brands N/A WPT®
Medium Coefficient Pneumatic Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure N/A 16100 lbf·in1820 N·m N/A 32200 lbf·in3640 N·m N/A 48400 lbf·in5460 N·m N/A 36700 lbf·in4150 N·m N/A 73400 lbf·in8290 N·m
High Coefficient Pneumatic Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure N/A 24900 lbf·in2820 N·m N/A 49800 lbf·in5630 N·m N/A 74700 lbf·in8450 N·m N/A 56700 lbf·in6410 N·m N/A 113000 lbf·in12800 N·m
Note for Pneumatic Torque Rating at 100 Pound per Square Inch (psi) (7 bar) Pressure N/A Pneumatic Max Actuator Pressure: 130 psi (9 bar) All sizes
Torque is directly proportional to the actuator pressure applied
Low Coefficient and Extra-High Coefficient Friction Material offerings are available.
Parallel Piping Heat Dissipation Capacity N/A 75 hp56 kW N/A 150 hp112 kW N/A 225 hp168 kW N/A 120 hp89 kW N/A 240 hp179 kW
Series Piping Heat Dissipation Capacity N/A 50 hp37 kW N/A 100 hp75 kW N/A 150 hp112 kW N/A 80 hp60 kW N/A 160 hp119 kW
Minimum Freshwater Flow N/A 7.50 gpm45 L/min N/A 15 gpm57 L/min N/A 23 gpm84 L/min N/A 12 gpm45 L/min N/A 24 gpm90 L/min
Note for Heat Dissipation Capacity and Minimum Freshwater Flow N/A 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 50°F (28°C) temperature rise between the inlet and outlet. The outlet water temperature should not exceed 170°F (77°C). Maximum inlet water pressure is 60 psi (4.1 bar). 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.
Maximum Free-Wheel Speed N/A 2740 rpm N/A 2740 rpm N/A 2740 rpm N/A 2120 rpm N/A 2120 rpm
Maximum Slip Speed N/A 1820 rpm N/A 1820 rpm N/A 1820 rpm N/A 1410 rpm N/A 1410 rpm
Total Weight N/A 240 lb110 kg N/A 380 lb170 kg N/A 510 lb230 kg N/A 350 lb160 kg N/A 620 lb280 kg
Hub and Drive Plate (DP) Weight N/A 35 lb16 kg N/A 68 lb31 kg N/A 163 lb74 kg N/A 100 lb46 kg N/A 200 lb91 kg
Hub and Drive Plate (DP) Inertia N/A 6.2 lb·ft²0.26 kg·m² N/A 12 lb·ft²0.52 kg·m² N/A 52 lb·ft²2.2 kg·m² N/A 18 lb·ft²0.75 kg·m² N/A 35 lb·ft²1.5 kg·m²
Dimension - A N/A 18.750 in476.25 mm N/A 18.750 in476.25 mm N/A 18.750 in476.25 mm N/A 23.250 in590.54 mm N/A 23.250 in590.54 mm
Dimension - A Tolerance N/A +0.000 in-0.003 in+0.00 mm-0.08 mm
Hole Circle (B) N/A 17.50 in444.5 mm N/A 17.50 in444.5 mm N/A 17.50 in444.5 mm N/A 22.00 in558.8 mm N/A 22.00 in558.8 mm
Diameter (B) N/A 21/32 in16.7 mm
Quantity1 N/A 6 N/A 6 N/A 6 N/A 10 N/A 10
Dimension - C N/A 14.375 in365.13 mm N/A 14.375 in365.13 mm N/A 14.375 in365.13 mm N/A 18.250 in463.55 mm N/A 18.250 in463.55 mm
Dimension - C Tolerance N/A +0.003 in-0.000 in+0.08 mm-0.00 mm
Thread Size P N/A 1/2
Thread Type N/A National Pipe Thread (NPT)
Dimension - D N/A 17-1/2 in444.5 mm N/A 17-1/2 in444.5 mm N/A 17-1/2 in444.5 mm N/A 22 in558.8 mm N/A 22 in558.8 mm
Dimension - E N/A 7 in177.8 mm N/A 10-5/8 in269.9 mm N/A 14-1/4 in362.0 mm N/A 8 in201.5 mm N/A 12-1/8 in308.0 mm
Minimum Bore Range2 N/A 2.13 in54.0 mm N/A 2.13 in54.0 mm N/A 2.13 in54.0 mm N/A 2.25 in57.2 mm N/A 2.25 in57.2 mm
Maximum Bore Range3 N/A 4.50 in114.3 mm N/A 4.50 in114.3 mm N/A 4.50 in114.3 mm N/A 5.78 in146.8 mm N/A 5.78 in146.8 mm
Features N/A
  • O-ring water jacket design for same-day field service
  • No outboard support required
  • Standardized mounting for OEM applications, rebuilds, or retrofits
  • The actuator is naturally corrosion resistant
  • Legacy service parts available for additional sizes
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 14” brakes have (6) mounting holes based on a (8) hole pattern. 18” and 24” brakes have (10) mounting holes based on a (12) hole pattern. (2) holes omitted for coolant inlets/outlets
  • 2 Maximum bores shown are with a standard square key. Contact WPT® Power for bore sizes exceeding those shown.
  • 3 Maximum bores shown are with a standard square key. Contact WPT® Power for bore sizes exceeding those shown.