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DBA Tech Specs
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DBA Tech Specs - 1

DBA Description Model DBA brakes are spring applied, pressure released, disc style brakes. They develop equal torque in either direction of rotation. Their torque and thermal capacities allow them to be used in the most demanding applications. Brake construction and operation is shown in the figure. Pressurizing the brake compresses the brake springs and withdraws the clamping plates from the brake discs. Standard brakes are furnished with either one or two discs, which are free to move axially. Model DBA uses a rubber diaphragm to form the releasing pressure chamber and to serve as the releasing piston. Brake friction material is attached to stationary components. Brake discs are either solid or ventilated. The disc type is indicated by an S for solid, or V, for ventilated, in the brake model designation. Solid discs are used in applications requiring a heat sink and/or where engagement is infrequent. Ventilated discs are recommended for cyclic applications. Torque ratings listed are for brakes with a standard compliment of springs. The quantity of springs can be varied to customize the torque of the brake to suit a particular application. Consult the factory for brake torque of units with non-standard spring configurations. Brake sizes are indicated by the number of brake discs and the disc diameter in inches. For instance, size 229DBA has two discs 29 inches in diameter. Features Large friction area. Allows brakes to absorb and dissipate high energy loads associated with high cyclic and high inertia stops. Minimal adjustment required for lining wear. Single disc units require no wear adjustment and dual disc units require only one wear adjustment during the long life of the friction material. Where used: • • Draglines • Power shovels • Conveyors • E-1 Can making machines Power presses Copyright Eaton Corporation, 1997, All rights reserved.

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DBA Tech Specs - 2

DBA Component parts 1 23 4 8 7 29 15, 21 19, 20 26, 27, 28 6 18 Item Number Description 1 Mounting Flange 33 2 Stud 3 Clamp Tube 4 Disc 5 Friction Disc 6 Flat Head Screw 7 Pressure Plate 8 Spring Housing 9 Locknut 10 Outer Clamp Ring 11 Diaphragm 12 End Plate 13 Inner Clamp Ring 14 Hex Head Screw 15 Lockwasher 16 Hex Head Screw 17 Lockwasher 18 Spring Retainer Plate 19 Inner Spring 20 Outer Spring 21 Hex Head Screw 22 Gear 23 Reaction Plate 24 Release Spring 25 Wear Spacer 26 Name Plate 27 Self Tapping Screw 28 Warning Decal 29 Washer 30 Air Tube 31 Air Tube 32 90 Deg. Street Elbow 33 90...

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