Products Catalog
  • Copper disc design for high heat dissipation
  • Accurate control
The Wichita Kopper Kool airtube disc Clutches and Brakes are liquid cooled and consist of a series of alternating discs connecting an inner drive member to an outer drive member.

Engagement is achieved by pneumatic expansion of the airtube. This air-operated clutch contains copper discs for excellent heat dissipation and provides an accurately controlled continuous slip action for constant web tensioning. Tension levels are in direct proportion to air pressure applied.
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Unit of Measure
Items
Tension Brakes/Very High Heat Capacity Kopper Kool Brakes

Kopper Kool Tension Brakes - Very High Heat Capacity
Tension Brakes/Very High Heat Capacity Kopper Kool Brakes

Kopper Kool Tension Brakes - Very High Heat Capacity
Tension Brakes/Very High Heat Capacity Kopper Kool Brakes

Kopper Kool Tension Brakes - Very High Heat Capacity
Tension Brakes/Very High Heat Capacity Kopper Kool Brakes

Kopper Kool Tension Brakes - Very High Heat Capacity
Tension Brakes/Very High Heat Capacity Kopper Kool Brakes

Kopper Kool Tension Brakes - Very High Heat Capacity
Design Features N/A
  • New friction material lasts longer with less wear on mating copper.
  • Copper alloy wear plates increase heat transfer.
  • Hub spline provides perfect alignment of rotating discs.
  • External air & water connections.
  • Release springs ensure complete disengagement.
  • High strength reinforced neoprene air-tube offers long service life.
  • Optional long stroke air tube available on 18" or 24" size units to increase life and standard maintenance intervals.
  • High thermal capacity.
Assembly Number N/A 7-306-110-200-0 N/A 7-306-210-200-0 N/A 7-308-110-100-0 N/A 7-308-210-100-0 N/A 7-308-310-101-0
Dynamic Torque Rating (80 psi/5.5 bar)1 N/A 2720 lb.in 307 Nm N/A 5440 lb.in 614 Nm N/A 4320 lb.in 479 Nm N/A 8640 lb.in 959 Nm N/A 12960 lb.in 1438 Nm
Dynamic Torque Rating (100 psi/7 bar)2 N/A 3400 lb.in 384 Nm N/A 6800 lb.in 768 Nm N/A 5400 lb.in 610 Nm N/A 10800 lb.in 1220 Nm N/A 16200 lb.in 1830 Nm
Heat Capacity for Series Water Hosing N/A 10 hp7.5 kW N/A 20 hp15 kW N/A 21 hp16 kW N/A 42 hp31 kW N/A 63 hp47 kW
Heat Capacity for Parallel Water Hosing N/A 15 hp11 kW N/A 30 hp22 kW N/A 32 hp24 kW N/A 64 hp48 kW N/A 96 hp72 kW
Maximum Bore Size N/A 1.75 in44 mm N/A 1.75 in44 mm N/A 2.25 in57 mm N/A 2.25 in57 mm N/A 2.25 in57 mm
Recommended Clearance N/A 1/16-3/32 in1.5-2 mm N/A 1/16-3/32 in1.5-2 mm N/A 1/16-3/32 in1.5-2 mm N/A 3/32-5/32 in2-4 mm N/A 1/8-3/16 in3-5 mm
Maximum Speed N/A 3800 rpm N/A 3800 rpm N/A 2860 rpm N/A 2860 rpm N/A 2860 rpm
Parallel Water Flow 0 % Ethylene Glycol N/A 1.5 gpm6 lpm N/A 3 gpm11 lpm N/A 3.2 gpm12 lpm N/A 6.4 gpm24 lpm N/A 9.6 gpm36 lpm
Parallel Water Flow 30 % Ethylene Glycol N/A 2.0 gpm7.4 lpm N/A 3.9 gpm14.8 lpm N/A 4.1 gpm1.6 lpm N/A 8.2 gpm32 lpm N/A 12.3 gpm48 lpm
Parallel Water Flow 50 % Ethylene Glycol N/A 2.3 gpm8.5 lpm N/A 4.5 gpm17 lpm N/A 5 gpm19 lpm N/A 10 gpm38 lpm N/A 15 gpm57 lpm
Total Brake (Weight) N/A 45 lb20.4 kg N/A 71 lb32.2 kg N/A 68 lb30.8 kg N/A 116 lb52.6 kg N/A 164 lb74.4 kg
Disc & Gear (Weight) N/A 5.5 lb2.5 kg N/A 11.7 lb5.3 kg N/A 11 lb5 kg N/A 25 lb11.1 kg N/A 38 lb17.2 kg
Disc & Gear (Inertia) N/A 0.14 lb·ft²0.01 kg·m² N/A 0.28 lb·ft²0.01 kg·m² N/A 0.6 lb·ft²0.03 kg·m² N/A 1.3 lb·ft²0.05 kg·m² N/A 2 lb·ft²0.08 kg·m²
Pressure Drop Parallel Flow with 0 % Ethylene Glycol N/A 0.9 psi0.06 bar
Pressure Drop Parallel Flow with 30 % Ethylene Glycol N/A 1.6 psi0.11 bar
Pressure Drop Parallel Flow with 50 % Ethylene Glycol N/A 2.3 psi0.16 bar
Pressure Drop Series Flow with 0 % Ethylene Glycol N/A N/A N/A 4 psi0.14 bar N/A 11 psi0.76 bar N/A 15 psi1.03 bar
Pressure Drop Series Flow with 30 % Ethylene Glycol N/A N/A N/A 9 psi0.62 bar N/A 25 psi1.72 bar N/A 34 psi2.34 bar
Pressure Drop Series Flow with 50 % Ethylene Glycol N/A N/A N/A 9 psi0.62 bar N/A 32 psi2.21 bar N/A 41 psi2.83 bar
Maximum Lining Wear N/A N/A N/A 0.4 in1.0 cm10 in³0.2 dm³ N/A 0.4 in1.0 cm10 in³0.2 dm³ N/A 0.4 in1.0 cm10 in³0.2 dm³
Water Volume N/A N/A N/A 8 in³0.13 dm³ N/A 16 in³0.26 dm³ N/A 24 in³0.4 dm³
Pilot Diameter A N/A 8.751/8.753 in222.28/222.33 mm N/A 8.751/8.753 in222.28/222.33 mm N/A 12.125/12.128 in307.98/308.05 mm N/A 12.125/12.128 in307.98/308.05 mm N/A 12.125/12.128 in307.98/308.05 mm
Bolt Hole Circle Diameter B N/A 8.000 in203.20 mm N/A 8.000 in203.20 mm N/A 11.125 in282.58 mm N/A 11.125 in282.58 mm N/A 11.125 in282.58 mm
Pilot Diameter C N/A 7.377/7.379 in187.38/187.43 mm N/A 7.377/7.379 in187.38/187.43 mm N/A 8.375/8.378 in212.73/212.80 mm N/A 8.375/8.378 in212.73/212.80 mm N/A 8.375/8.378 in212.80/212.73 mm
Dimension D N/A 8.81 in223.8 mm N/A 8.81 in223.8 mm N/A 11.75 in288.5 mm N/A 11.75 in288.5 mm N/A 11.75 in288.5 mm
Dimension F N/A 2.00 in50.8 mm N/A 4.63 in117.6 mm N/A 2.00 in50.8 mm N/A 4.25 in108 mm N/A 7.00 in177.8 mm
Dimension G N/A 0.75 in19.1 mm N/A 0.75 in19.1 mm N/A 1.13 in28.7 mm N/A 1.13 in28.7 mm N/A 1.13 in28.7 mm
Dimension H N/A 5.25 in133.4 mm N/A 7.63 in193.8 mm N/A 5.68 in144.3 mm N/A 8.43 in214.1 mm N/A 11.12 in282.4 mm
Dimension J N/A 0.13 in3.3 mm N/A 0.13 in3.3 mm N/A 0.25 in6.4 mm N/A 0.25 in6.4 mm N/A 0.25 in6.4 mm
Number of Bolt Holes N/A 4
Bolt Hole Size L N/A 0.34 in8.6 mm N/A 0.34 in8.6 mm N/A 17/32 in13.5 mm N/A 17/32 in13.5 mm N/A 17/32 in13.5 mm
Dimension M N/A 2.94 in74.7 mm N/A 2.94 in74.7 mm N/A 4.38 in111.3 mm N/A 4.38 in111.3 mm N/A 4.38 in111.3 mm
Dimension N N/A 2.43 in61.7 mm N/A 2.43 in61.7 mm N/A 3.50 in88.9 mm N/A 3.50 in88.9 mm N/A 3.50 in88.9 mm
Dimension Q N/A 0.38 in9.7 mm N/A 0.38 in9.7 mm N/A 1.38 in35.1 mm N/A 1.38 in35.1 mm N/A 1.38 in35.1 mm
Number of Inlet Ports - Thread Size N/A 2- 1/2 NPT
Dimension T N/A 2.00 in50.8 mm N/A 2.00 in50.8 mm N/A 3.75 in95.3 mm N/A 3.75 in95.3 mm N/A 3.75 in95.3 mm
Minimum U N/A 0.60 in15.2 mm N/A 0.60 in15.2 mm N/A 1.00 in25.4 mm N/A 1.00 in25.4 mm N/A 1.00 in25.4 mm
Maximum U N/A 1.75 in44.5 mm N/A 1.75 in44.5 mm N/A 2.25 in57.2 mm N/A 2.25 in57.2 mm N/A 2.25 in57.2 mm
Number of Coolant Inlets - Thread Size3 N/A 2 - 1/4 NPT N/A 3 - 1/4 NPT N/A 2 - 3/8 NPT N/A 3 - 3/8 NPT N/A 4 - 3/8 NPT
Note N/A Maximum water jacket inlet pressure is 60 PSI. Brakes with as great as 50 % higher torque capacity is available upon request.

For mounting, use socket head capscrews conforming to the ASTM-574-97a.
Manufacturer N/A Wichita Clutch
Actuation N/A Air Applied
  • 1 Static torque will vary with temperature. Maximum air pressure is 100 PSI / 7 BAR. Minimum recommended air pressure is 3 PSI.
  • 2 Static torque will vary with temperature. Maximum air pressure is 100 PSI / 7 BAR. Minimum recommended air pressure is 3 PSI.
  • 3 Number of inlets and outlets are equivalent.
    (Consult factory for drawing before final layout.)