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DCB Tech Specs

DCB Tech Specs
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21 DCB Clutch/Brake Description and Technical Data Description Technical Data The 21DCB combination clutch/brake package was specifically designed for the can making industry to withstand the cyclic impact loads associated with high speed can extruding machinery. A patented quick release air manifold provides fast clutch/brake response; stopping the ram to prevent die damage due to material misfeed. Torque Rating MrÊ at 85 psi (5,9 bar) Clutch static torque: 75000 lb·in (8475 N·m) Brake dynamic torque: 55000 lb·in (6215 N·m) Operating Pressure Maximum allowable pressure pr: 85 psi (5,9 bar) The unit is ideally suited for high speed continuously running machinery requiring an extremely fast stop. The package consists of an air-actuated disc clutch and a spring-applied disc brake. The clutch disc is guided axially at its outside diameter by a series of bushings which attach to the driving flywheel. The brake disc is reacted to the machine frame by two reaction arms. The housing hub is pressed on and keyed to the driven shaft. When the cylinder is pressurized, the piston clamps the clutch disc to the hub, transmitting torque to the shaft. When the cylinder exhausts, springs move the piston in the opposite direction, clamping the brake disc and stopping the shaft. Overlapping cannot occur between clutching and braking. Brake releasing pressure ps : 38 psi (2,6 bar) Maximum SpeedË 1000 rpm Inertia Housing : 90 lb·ft2 (3,8 kg·m2) Clutch disc : 18 lb·ft2 (0,76 kg·m2) Weight Housing and manifold: 290 lb (130 kg) Each friction disc : 52 lb (24 kg) Air Cylinder VolumeÌ With new linings : 55 in3 (0,8 dm3) With worn linings: 80 in3 (1,3 dm3) Brake Response to Full Torque With new linings : 0.035 sec With worn linings: 0.045 sec Notes: Ê Ratings are for worn in new linings. Decrease ratings 12% for worn linings. Ë Maximum speed for non-cyclic operation. Maxi- mum speed for single stroke operation is dependent upon thermal requirements. Dynamic balancing required for operating speeds over 750 rpm. Ì Absolute volume required per engagement. Thermal Capacity Non-Cyclic: 400000 ft·lb (542400 J) Cyclic: 100 rpm: 1.5 HP (1,1 kW) 300 rpm: 2.1 HP (1,6 kW) 500 rpm: 2.6 HP (1,9 kW) 700 rpm: 3.1 HP (2,3 kW) 900 rpm: 3.4 HP (2,5 kW) F - 11 Copyright Eaton Corporation, 1995, All rights reserved.

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21 DCB Clutch/Brake Dimensional Data 26.00 660 23.00 584 7.88 200 6.00 152 21.56 548 0.09 2 5/8 - 18 UNC 12 Equally spaced bushings Typical through shaft mounting Copyright Eaton Corporation, 1995, All rights reserved. 3.12 79 Maximum bore - 5.50 (140mm) Typical shaft end mounting F - 12

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