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Airflex ® DBB & DBA Brakes
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Catalog excerpts

Airflex ® DBB & DBA Brakes - 1

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.

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Airflex ® DBB & DBA Brakes - 2

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...

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Airflex ® DBB & DBA Brakes - 3

Item No. Description Item No. Description Item No. Description 1 Mounting Flange 13 Cylinder 25 Ring Gear 2_Stud_ _14_Hex Head Screw_ _26_Pipe Nipple_ 3 Friction Disc Sub-Assembly 15 Outer Seal 27 Elbow 4 Friction Disc 16 Spring 28 Pipe Cross 5 Friction Disc Core 17 Inner Seal 29 Hose Assembly 6 Rivet 18 Spacer Tube 30 Pipe Nipple 7 Washer 19 Gear 31 Flow Control Valve 8 Clamp Tube 20 Wear Spacer 32 45 Deg. Street Elbow 9 Pressure Plate 21 Reaction Plate 33 Pipe Reducer 10 Spring Housing 22 Release Spring 34 Hose Assembly 11 FlatWasher 23 FlatWasher 35 Spring Retainer 12 Locknut 24 Hex Head...

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Airflex ® DBB & DBA Brakes - 4

DBB Elements Dimensional Data English Bore Range Bore Range Mounting Bolt Circles (6) 0.531 (13,5) Ø Mounting holes equally spaced as shown on 11.125 (282,5) Bolt Circle (6) 0.656 (16,7) Ø Mounting holes based on 8 equally spaced holes on 17.500 (444,5) Bolt Circle (12) 0.656 (16,7) Ø Mounting holes equally spaced as shown on 22.000 (558,8) Bolt Circle 25DBB ✱ (12) 0.656 (16,7) Ø Mounting holes equally spaced as shown on 28.750 (730,3) Bolt Circle 38DBB (16) 1.062 (27,0) Ø Mounting holes equally spaced as shown on 42.000 (1066,8) Bolt Circle Notes: 1 0.50 in (13 mm) for 109 DBB 0.25 in (6...

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Airflex ® DBB & DBA Brakes - 5

DBB Elements Technical Data Single Disc Brake Dual Disc Brake lb•in Gear Part Number Maximum Speed Minimum Releasing Pressure Releasing Volume Friction Area SI Copyright Eaton Corporation, 2003, All Rights Reserved.

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Airflex ® DBB & DBA Brakes - 6

DBBS Component Parts Dual disc element shown Item No. Description Item No. Description 1 Mounting Flange 12 Spring 3 Friction Disc 14 Spacer Tube 5 Pressure Plate __16_Wear Spacer 6 Spring Housing 17 Reaction Plate 7 Flat Washer _18_Release Spring 8 Lock Nut 19 Spring Retainer 9 Cylinder 20 Flat Head Screw JO_Hex Head Screw_ __21_Disc_ Copyright Eaton Corporation, 2003, All Rights Reserved.

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Airflex ® DBB & DBA Brakes - 7

DBBS Elements Dimensional Data Single Disc Element Dual Disc Element D45^ ~- O Brake in disengaged position. O Maximum diameter of "as cast" surfaces. ©American National Pipe Thread. © See note 4 on revised page 11 © See note 5 on revised page 11 Mounting Bolt Circles Mounting holes equally Mounting holes equally Mounting holes equally Copyright Eaton Corporation, 2003, All Rights Reserved

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Airflex ® DBB & DBA Brakes - 8

DBBS Elements Technical Data 4 Minimum Releasing Pressure Gear Part Number Friction Area Maximum Speed Disc & Gear Notes: 1 Basic part number only. Does not include gear. Gear must be ordered separately with bore and keyway requirements. 2 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....

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Airflex ® DBB & DBA Brakes - 9

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...

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Airflex ® DBB & DBA Brakes - 10

Mounting Flange Clamp Tube Friction Disc Flat Head Screw Pressure Plate Spring Housing Outer Clamp Ring Inner Clamp Ring Spring Retainer Plate Inner Spring Outer Spring Reaction Plate Release Spring Wear Spacer Name Plate Self Tapping Screw Warning Decal Hose Assembly Flow Control Valve Copyright Eaton Corporation, 2003, All Rights Reserved.

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Airflex ® DBB & DBA Brakes - 11

DBA Elements Dimensional and Technical Data Special Mounting Flange are available that permit mounting to 800 series frame motors. 6 equally spaced mounting holes on an H bolt circle Single Disc Brake Dual Disc Brake Basic Size Bore Range Ventilated Disc Types Solid Disc Types Gear Part Number Minimum Releasing Pressure 6,9 Disc & Gear Disc & Gear Maximum Speed Part Number Releasing Volume Friction Area 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...

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Airflex ® DBB & DBA Brakes - 12

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...

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