The Rowland Company
4900 North 20th Street
Philadelphia, PA 19144
Toll Free: 800-925-8824   Phone: 215-455-4900    Fax: 215-455-8888
E-Mail: rowland@rowland2.com    Web site: www.rowlandcompany.com
All Categories > Clutches and Brakes > Tension Brakes > Kopper Kool Clutches and Brakes > Kopper Kool Tension Brakes - Very High Heat Capacity > Item # KKB 308  


Item # KKB 308, Kopper Kool Tension Brakes - Very High Heat Capacity

  • 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.





Design Features  · Specifications  · Note

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
7-308-310-101-0

Dynamic Torque Rating (80 psi/5.5 bar)1
12960 lb.in
1438 Nm

Dynamic Torque Rating (100 psi/7 bar)2
16200 lb.in
1830 Nm

Heat Capacity for Series Water Hosing
63 hp
47 kW

Heat Capacity for Parallel Water Hosing
96 hp
72 kW

Maximum Bore Size
2.25 in
57 mm

Parallel Water Flow 0 % Ethylene Glycol
9.6 gpm
36 lpm

Parallel Water Flow 30 % Ethylene Glycol
12.3 gpm
48 lpm

Parallel Water Flow 50 % Ethylene Glycol
15 gpm
57 lpm

Total Brake (Weight)
164 lb
74.4 kg

Disc & Gear (Weight)
38 lb
17.2 kg

Disc & Gear (Inertia)
2 lb·ft²
0.08 kg·m²

Pressure Drop Series Flow with 0 % Ethylene Glycol
15 psi
1.03 bar

Pressure Drop Series Flow with 30 % Ethylene Glycol
34 psi
2.34 bar

Pressure Drop Series Flow with 50 % Ethylene Glycol
41 psi
2.83 bar

Maximum Lining Wear
0.4 in
1.0 cm
10 in³
0.2 dm³

Water Volume
24 in³
0.4 dm³

Pilot Diameter A
12.125/12.128 in
307.98/308.05 mm

Bolt Hole Circle Diameter B
11.125 in
282.58 mm

Pilot Diameter C
8.375/8.378 in
212.80/212.73 mm

Dimension D
11.75 in
288.5 mm

Dimension F
7.00 in
177.8 mm

Dimension G
1.13 in
28.7 mm

Dimension H
11.12 in
282.4 mm

Dimension J
0.25 in
6.4 mm

Number of Bolt Holes
4

Bolt Hole Size L
17/32 in
13.5 mm

Dimension M
4.38 in
111.3 mm

Dimension N
3.50 in
88.9 mm

Dimension Q
1.38 in
35.1 mm

Number of Inlet Ports - Thread Size
2- 1/2 NPT

Dimension T
3.75 in
95.3 mm

Minimum U
1.00 in
25.4 mm

Maximum U
2.25 in
57.2 mm

Number of Coolant Inlets - Thread Size3
4 - 3/8 NPT

Manufacturer
Wichita Clutch

Actuation
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.)


Note
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.