Airflex Airflex DBB & DBA Brakes ® These spring-applied, pressure released, disc style brakes develop equal torque in either direction of rotation. Their torque and thermal capacities allow them to be used in the most demanding applications.

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 multiple discs, which are free to move axially. Model DBB uses a conventional piston design to release the brake discs. The rotation component of the DBB style...

3 Friction Disc Sub-Assembly 5 Friction Disc Core 14 Hex Head Screw 24 Hex Head Screw 31 Flow Control Valve Copyright Eaton Corporation, 2003, All Rights Reserved.

Dimensional Data Bore Range Bore Range Notes: M 0.50 in (13 mm) for 109 DBB 0.25 in (6 mm) for 209 DBB 0.00 in (0 mm) for 309 DBB >2 Tolerance +0.000/-0.003 in (+0,00/-0,08 mm) ^2 Tolerance +0.003/-0.000 in (+0,08/-0,00 mm) [4 American National Pipe Thread. a Brake in disengaged position. a All DBB brakes can be supplied plumbed as shown with a flow control valve having American National Pipe thread ports of 1/2-14 for size 9DBB, 3/4-14 for sizes 15DBB, 20DBB, 25DBB and 1-11 1/2 for size 38DBB. Basic part number only. Does not include gear. Gear must be ordered separately with the bore and keyway...

Technical Data Part Number Torque Rating Friction Area Disc & Gear J Mass Maximum Speed Copyright Eaton Corporation, 2003, All Rights Reserved.

Item No. Description 1 Mounting Flange 10 Hex Head Screw 20 Flat Head Screw Copyright Eaton Corporation, 2003, All Rights Reserved.

DBBS Elements Dimensional Data Single Disc Element Dual Disc Element English Mounting Bolt Circles Notes: 1 Brake in disengaged position. 6 See note 4 on revised page 11 7 See note 5 on revised page 11 3 Tolerance +0.003/-0.000 in (+0,08/-0,00 mm) 4 Maximum diameter of "as cast'' surfaces. 5 American National Pipe Thread. Copyright Eaton Corporation, 2003, All Rights Reserved.

1 Part Gear Part Number Number Friction Area Disc & Gear J Mass Maximum Speed Notes: ^ Basic part number only. Does not include gear. Gear must be ordered separately with bore and keyway requirements. a Dynamic torque shown. Static torque approximately 15% greater. Torque values are for new linings. Torque decreases with lining wear. At worn out condition, torque is approximately 0.66 of values shown. 3 Torque ratings are for units with a standard complement of springs. Consult factory for torque ratings of units with non-standard spring configurations. [4 Maximum allowable cylinder...

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...

Mounting Flange Stud Clamp Tube Disc Friction Disc Flat Head Screw Pressure Plate Spring Housing Locknut Outer Clamp Ring Diaphragm End Plate Inner Clamp Ring Hex Head Screw Lockwasher Hex Head Screw Lockwasher Spring Retainer Plate Inner Spring Outer Spring Hex Head Screw Gear Reaction Plate Release Spring Wear Spacer Name Plate Self Tapping Screw Warning Decal Washer Air Tube Air Tube 90 Deg. Street Elbow 90 Deg. Male Elbow Cross Hose Assembly Flow Control Valve Bushing Copyright Eaton Corporation, 2003, All Rights Reserved.

6 equally spaced mounting holes on an H bolt circle Special Mounting Flange are available that permit mounting to 800 series frame motors. Basic Size Maximum Speed Notes: [1 Basic part number only. Does not include gear. Gear must be ordered separately with the bore and keyway requirements. All ventilated disc brakes are furnished with an approximate 15.5 inch (394 mm) length of flexible hose and a flow control valve having a 1-11 1/2 American National Pipe Thread port. [2 Tolerance +0.000/-0,003 in (+0.00/-0,08 mm) Copyright Eaton Corporation, 2003, All Rights Reserved. 3 American National Pipe...

For More Information Eaton’s worldwide network of Sales Engineers and Distributors are ready to assist you with additional technical data or application information. Call the 800 number below for the name of your nearest Airflex sales office. Call: 1-800-AIRFLEX (247-3539) or FAX: 216-281-3890 Eaton offers many other answers to your clutch and brake problems. Contact Airflex for a free copy of our Engineering Catalog... now on CD or review the entire catalog at our web site. The catalog covers the full line of Airflex clutches and brakes including descriptions, dimensions and application information....