DBB Tech Specs0 pages

DBB Description
Model DBB 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 DBB uses a conventional piston design to
release the brake discs. The rotating component
of the DBB style brake is a very low inertia
friction disc core with riveted on friction discs.
The low inertia of the rotating components
coupled with the high heat sink capacity of the
stationary members allow these units to provide
superior performance in high cyclic applications.
In applications requiring higher speed operation
or where precise balance of the rotating
components is required, the DBBS style is
offered, which utilizes a solid rotor and stationary
friction material. Similar to the DBAS design, the
DBBS should only be used for applications where
brake engagement is non-cyclic.
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 225DBB has two discs 25 inches
in diameter.
Features
Low inertia friction disc assembly.
Reduces the overall inertia that must be stopped.
Optional split friction discs.
Allows removal of friction discs without disturbing other
components of drive system in mid-shaft brake arrangement.
Long wearing, self lubricating PolyPak* seals.
Eliminates premature twisting failure and requires no external lubrication.
Where used:
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•
Power Shovels
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Conveyors
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Shears
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E-5
Bottling equipment
Power Presses
Copyright Eaton Corporation, 1997, All rights reserved.