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146163

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

  • Can making machines
  • Draglines
  • Power shovels
  • Conveyors
  • Power presses

Specifications

Model

229DBAV

Gear Part Number

413585

Dimension D25

2.75 in
70 mm

Dimension H

31.00 in
787 mm

Dimension H11

28.00 in
711 mm

Dimension H13

14.75 in
375 mm

Dimension H16

10.25 in
260 mm

Dimension G1

33.998 in
863.5 mm

Dimension L

1.06 in
27 mm

Dimension O2

1-11 1/2 NPT

Minimum Bore

4.88 in
124 mm

Maximum Bore

7.19 in
182 mm

Dimension D

19.13 in
486 mm

Dimension D1

17.38 in
441 mm

Dimension D7

7.12 in
181 mm

Dimension D29

2.25 in
59 mm

Dynamic Torque Rating2

216000 lb·in
24400 Nm

Disc & Gear (Inertia)

191 lb·ft²
8.02 kg·m²

Disc & Gear (Weight)

340 lb
154 kg

Housing (Weight)

1150 lb
521 kg

Minimum Releasing Pressure

60 psi
4.1 bar

Maximum Speed

900 rpm

Manufacturer

Eaton-Airflex

Actuation

Spring Applied, Air Release

Notes

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 nonstandard 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.

1 Tolerance +0.000/-0.003 in (+0,00/-0,08 mm)
2 Dynamic torque shown. Static torque approximately 1.15 greater. Torque values are for new linings. Torque decreases with lining wear. At the worn out condition, torque is approximately 0.66 of values shown.