DBA Tech Specs0 pages

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
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Power shovels
•
Conveyors
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E-1
Can making machines
Power presses
Copyright Eaton Corporation, 1997, All rights reserved.