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Brake Design
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Graphic Communications,Vasant, Bramhagiri Society, Jail Road, Nashik Road – 422101 [India], Tel: +91-253-2410381
Email: [email protected] / [email protected] Web Site: http://www.box.net/mechdesign
Page 1 of 3Document Created by: Mahesh P Deshmukh.
Mobile: 91-9922626781This document is sole property of Graphic Communications and can not be created or published without written permission, under the
copyright act.
Graphic Communications,Vasant, Bramhagiri Society, Jail Road, Nashik Road – 422101 [India], Tel: +91-253-2410381
Email: [email protected] / [email protected] Web Site: http://www.box.net/mechdesign
BRAKES are machine elements that absorb kinetic or potential energy in the
processes of slowing down or stopping a moving part. The absorbed energy is dissipated
as heat. Break capacity depend upon unit pressure between the breaking surfaces, the
coefficient of friction and ability of the brake to dissipate heat equivalent to energy
absorbed. The performance of brake is similar to that of clutches except the clutches
connect one moving part to another moving part, where brake connects a moving part to a
frame. Brake FactorAF AF TF1 & TF2
TF1
TF2
AF
Brake Factor = Tangential Force / Actuating Force
or
BF = TF.total / AF
Disc Brake
Drum Brake
Brake FactorAF AF TF1 & TF2
TF1
TF2
AF
Brake Factor = Tangential Force / Actuating Force
or
BF = TF.total / AF
Disc Brake
Drum Brake
AF AF TF1 & TF2AF AF TF1 & TF2TF1
TF2
AF
TF1
TF2
AF
Brake Factor = Tangential Force / Actuating Force
or
BF = TF.total / AF
Disc Brake
Drum Brake
Ff
W=mgFapplied
N
µinterfaceFfFf
W=mgW=mgFappliedFapplied
NN
µinterfaceµinterface
Page 2 of 3Document Created by: Mahesh P Deshmukh.
Mobile: 91-9922626781This document is sole property of Graphic Communications and can not be created or published without written permission, under the
copyright act.
åFx = 0
Graphic Communications,Vasant, Bramhagiri Society, Jail Road, Nashik Road – 422101 [India], Tel: +91-253-2410381
Email: [email protected] / [email protected] Web Site: http://www.box.net/mechdesign
Broad Classifications External Shoe or Block Brakes Single Block Brake Double Shoe Brake Internal Shoe Brake Band Brake
Heat Generated = p Ac f V / 778 [Btu/min]
Where p = average contact pressure Ac = contact area, in²f = coefficient of frictionV = peripheral velocity of drum
Material Max Temp, ºF f Pmax ,psiMetal on metal 600 0.25 200Wood on metal 150 0.25 70Leather on metal 150 0.35 25Asbestos on metal in oil 500 0.40 50Sintered metal on cast iron in oil 500 0.15 400
Page 3 of 3Document Created by: Mahesh P Deshmukh.
Mobile: 91-9922626781This document is sole property of Graphic Communications and can not be created or published without written permission, under the
copyright act.
