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KKB 321

  • 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

7-321-310-100-0

Dynamic Torque Rating (80 psi/5.5 bar)

148800 lb.in|16511 Nm

Dynamic Torque Rating (100 psi/7 bar)

186000 lb.in|21015 Nm

Heat Capacity for Series Water Hosing

300 hp
224 kw

Heat Capacity for Parallel Water Hosing

450 hp
336 kw

Maximum Bore Size

6.50 in
165 mm

Recommended Clearence

5/32-7/32 in
4-6 mm

Maximum Speed

1100 rpm

Parallel Water Flow 0 % Ethylene Glycol

45 lgm
170 lpm

Parallel Water Flow 30 % Ethylene Glycol

59 lgm
221 lpm

Parallel Water Flow 50 % Ethylene Glycol

68 lgm
255 lpm

Total Brake Weight

1075 lb
488 kg

Disc Gear Weight

301 lb
137 kg

Disc Gear Inertia

97 lb·ft
4.09 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

26.977/27.000 in
685.22/685.80 mm

Bolt Hole Circle Diameter B

25.500 in
647.70 mm

Pilot Diameter C

21.378/21.375 in
543.00/542.93 mm

Dimension D

24.88 in
632 mm

Dimension F

12.44 in
316 mm

Dimension G

1.25 in
31.8 mm

Dimension H

17.19 in
436.6 mm

Dimension J

0.25 in
6.4 mm

Number of Bolt Holes

10

Bolt Hole Size L

21/32 in
16.7 mm

Dimension M

11.38 in
289.1 mm

Dimension N

10.50 in
266.7 mm

Dimension Q

1.75 in
44.5 mm

Number of Inlet Ports – Thread Size

3- 1/2 NPT

Dimension T

11.38 in
289.1 mm

Minimum U

2.00 in
50.8 mm

Maximum U

6.50 in
165.1 mm

Number of Coolant Inlets – Thread Size

4 – 3/4 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.)