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KKB 311

Kopper Kool Brakes
  • 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

Design Features

  • 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.

Specifications

Assembly Number

7-311-310-100-0

Dynamic Torque Rating (80 psi/5.5 bar)

28800 lb.in|3196 Nm

Dynamic Torque Rating (100 psi/7 bar)

36000 lb.in|4067 Nm

Heat Capacity for Series Water Hosing

105 hp
78 kw

Heat Capacity for Parallel Water Hosing

158 hp
118 kw

Maximum Bore Size

3.00 in
76 mm

Recommended Clearence

1/8-3/16 in
3-5 mm

Maximum Speed

2100 rpm

Parallel Water Flow 0 % Ethylene Glycol

15.8 lgm
60 lpm

Parallel Water Flow 30 % Ethylene Glycol

20.5 lgm
78 lpm

Parallel Water Flow 50 % Ethylene Glycol

20.5 lgm
78 lpm

Total Brake Weight

314 lb
142.4 kg

Disc Gear Weight

84 lb
38.1 kg

Disc Gear Inertia

6 lb·ft
0.25 kg·m

Pressure Drop Parallel Flow with 0 % Ethylene Glycol

psi
bar

Pressure Drop Parallel Flow with 30 % Ethylene Glycol

psi
bar

Pressure Drop Parallel Flow with 50 % Ethylene Glycol

psi
bar

Maximum Lining Wear

N/A

Maximum Lining Wear

in3
dm3

. in3
dm3

Pilot Diameter A

15.997/16.000 in
406.32/406.40 mm

Bolt Hole Circle Diameter B

14.75 in
374.65 mm

Pilot Diameter C

11.375/11.378 in
288.93/289.00 mm

Dimension D

14.75 in
374.7 mm

Dimension F

9.12 in
231.6 mm

Dimension G

0.75 in
19.1 mm

Dimension H

12.81 in
325.4 mm

Dimension J

0.25 in
6.4 mm

Number of Bolt Holes

4

Bolt Hole Size L

21/32 in
16.7 mm

Dimension M

5.38 in
136.7 mm

Dimension N

4.63 in
117.6 mm

Dimension Q

1.13 in
28.7 mm

Number of Inlet Ports – Thread Size

2- 1/2 NPT

Dimension T

5.25 in
133.4 mm

Minimum U

1.00 in
25.4 mm

Maximum U

3.00 in
76.2 mm

Number of Coolant Inlets – Thread Size

4 – 1/2 NPT

Manufacturer

Wichita Clutch

Actuation

Air Applied

Notes

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.

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.)