The hand clamp is constructed using a square-threaded screw having a mean diameter of 36 mm, a lead of 4 mm, and a coefficient of static friction at the screw of μ = 0.3. To tighten the screw, a force of F = 20 N is applied perpendicular to the handle. Determine the clamping force in the board AB. 50 mm F 10000 F A B

The hand clamp is constructed using a square-threaded screw having a mean diameter of 36 mm, a lead of 4 mm, and a coefficient of static friction at the screw of μ = 0.3. To tighten the screw, a force of F = 20 N is applied perpendicular to the handle. Determine the clamping force in the board AB. 50 mm F 10000 F A B

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.56P: The square-threaded screw 0f the C-clamp has a mean diameter of 8 mm and a pitch of 1.6 mm. The...

See similar textbooks

Similar questions

The screw of the clamp has a square thread of pitch 0.16 in. and a mean diameter of 0.6 in. The coefficient of static friction between the threads is 0.4. Determine (a) the torque C0 that must be applied to the screw in order to produce a 28-lb clamping force at A; and (b) the torque required to loosen the clamp.
The leather rein used to fasten the horse to the hitching rail weighs 3.5 oz per foot. The coefficient of static friction between the rail and the rein is 0.6. If a 34-lb force acting on the bridle is sufficient to restrain the horse, determine the smallest safe length L for the free end of the rein.
The single-plate clutch transmits the torque C from the input shaft on the left to the output shaft on the right. Compression springs between the clutch housing and the pressure plate provide the necessary pressure on the friction surface. The splines prevent the clutch plate from rotating relative to the output shaft. If Ri=4 in. and R0=9 in., determine the total force that must be applied to the pressure plate by the springs if the clutch is to transmit a torque of C=56lbft when it is new.
The two homogeneous bars AB and BC are connected with a pin at B and placed between rough vertical walls. If the coefficient of static friction between each bar and the wall is 0.25, determine the largest angle 6 for which the assembly will remain at rest.
A horizontal force of F = 40 N is applied perpendicular to the handle of the lever at E. The mean diameter and lead of the single square-threaded screw at C and D are 25 mm and 5 mm, respectively.The coefficient of static friction is μs = 0.3. (Figure 1) Determine the clamping force developed at G.
Couple forces of F= 35 N are applied to the handle of the machinist's vise. The guide at B is smooth. The single square-threaded screw has a mean radius of 6 mm and a lead of 8 mm , and the coefficient of static friction is μs= 0.27.
The block brake consists of a pin-connected lever and friction block at B. The coefficient of static friction between the wheel and the lever is μs = 0.3, and a torque of 5 N ⋅m is applied to the wheel. Determine if the brake can hold the wheel stationary when the force applied to the lever is (a) P = 30 N, (b) P = 70 N Draw the free-body diagram of the lever.
the 31mm diameter screw has a double square theread with pitch of 6 mm and a lead of 12 mm .the screw and it's mating threads in the fixed block are graphite- lubricated and have a friction coefficient of 0.09. M=51N.m is applied to the right-hand portion of the shaft , determine (a) the force P required to advance the shaft to the right (b) the force P which would allow the shaft to move to the left at constant speed
A square threaded screw is used to clamp two boards together. The clamping force on the boards is 1000 lb, determine the torque needed to tighten the score to this compressive force. The double square-threaded screw has a mean diameter of 1.0 in. and a pitch of 0.25 in. The coefficient of static friction is μs=0.15
The required clamping force at the board A is to be 1.7 kN . The square-threaded screw has a mean radius of 10 mm and a lead of 3 mm, and the coefficient of static friction is 0.3. (Figure 1) Determine the torque M that must be applied to the screw to tighten it down. Express your answer to three significant figures and include the appropriate units.
Two hemispheres having an inner radius of 2 ft and wall thickness of 0.25 in. are fitted together, and the inside pressure is reduced to -10 psi. If the coefficient of static friction is ms = 0.5 between the hemispheres, determine (a) the torque T needed to initiate the rotation of the top hemisphere relative to the bottom one, (b) the vertical force needed to pull the top hemisphere off the bottom one, and (c) the horizontal force needed to slide the top hemisphere off the bottom one.
The shaft has a square-threaded screw with a lead of 8 mm and a mean radius of 15 mm. If it is in contact with a plate gear having a mean radius of 30 mm, determine the resisting torque M on the plate gear which can be overcome if a torque of 7 N⋅m is applied to the shaft. The coefficient of static friction at the screw is μB =0.2. Neglect friction of the bearings located at A and B.