A block type hand brake with 3 cm face width is present in Figure 2. The associated mean co-efficient of friction is 0.25. Due to environmental factor the standard deviation of co-efficient of friction is σ^f=0.025\hat{\sigma}_f = 0.025σ^f=0.025. For an estimated actuating force of 400N, find the brake torques corresponding to ±3σ^f\pm 3\hat{\sigma}_f±3σ^f.
The figure shows a 400 mm diameter brake drum with four internally expanding shoes. Each of the hinge pins A and B support a pair of shoes. The actuating mechanism is to be arranged to produce the same force F on each shoe. The face width of the shoe is 75 mm. The maximum pressure is 1000 kPa and coefficient of friction f= 0.24. Determine the maximum actuating force, brake capacity and hinge-pin-reaction.
The Figure 2 depicts a band brake whose drum rotates counterclockwise at 200 rev/min. The drum diameter is 16 in and the band lining 3 in wide. The coefficient of friction is 0.20. The maximum lining interface pressure is 70 psi.
Find the maximum brake torque, necessary force P, and steady-state power.
Complete the free-body diagram of the drum. Find the bearing radial load that a pair of straddle-mounted bearings would have to carry.
What is the lining pressure p at both ends of the contact arc?
The block-type hand brake shown in the Figure Q.4 has a face width of 1.25 in and a mean coefficient of friction of 0.25. For an estimated actuating force of 90 lbf, find the maximum pressure on the shoe and find the braking torque.
The block type hand brake shown in the Figure 1 has a face width of 1.25 in and a mean coefficient of friction of 0.25. For an estimated actuating force of 90 lb, find the maximum pressure on the shoe and find the braking torque.