Q5. The drum of a simple band brake is 450 mm. The band embraces 3/4th of the circumference of the drum. One end of the band is attached to the fulcrum pin and the other end is attached to a pin B as shown in Fig. 25.41. The band is to be lined with asbestos fabric having a coefficient

Elements Of Electromagnetics
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ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Q5. The drum of a simple band brake is 450 mm. The band
embraces 3/4th of the circumference of the drum. One
end of the band is attached to the fulcrum pin and the
other end is attached to a pin B as shown in Fig. 25.41. The
band is to be lined with asbestos fabric having a coefficient
of friction 0.3. The allowable bearing pressure for the
brake lining is 0.21 N/mm2. Design the band shaft, key,
lever and fulcrum pin. The material of these parts is mild
steel having permissible stresses as follows: ot = oc = 70
МРа, and t %3D56 MPа
250 N
75
450
T O
270
All dimensions in mm.
Transcribed Image Text:Q5. The drum of a simple band brake is 450 mm. The band embraces 3/4th of the circumference of the drum. One end of the band is attached to the fulcrum pin and the other end is attached to a pin B as shown in Fig. 25.41. The band is to be lined with asbestos fabric having a coefficient of friction 0.3. The allowable bearing pressure for the brake lining is 0.21 N/mm2. Design the band shaft, key, lever and fulcrum pin. The material of these parts is mild steel having permissible stresses as follows: ot = oc = 70 МРа, and t %3D56 MPа 250 N 75 450 T O 270 All dimensions in mm.
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