Q3) The screw, as shown is operated by a torque applied to the lower end. The nut is loaded and prevented from turning by guides. Assume friction in the ball bearing to be negligible. The screw is a triple-start trapezoidal thread. The outside diameter of the screw is 48 mm and the pitch is 8 mm. The coefficient of friction of the threads is 0.15. For trapezoidal threads, 2 B=30°) Find: 1. Load which can be raised by a torque of 40 N-m; and 8 WV.C.n W G.d Pb ndin 2. Average bearing pressure between the screw and nut thread surface. T₁ = ² × H, X W (R.) ¹ - (R₂) ² (R₁)²-(R₂)²] 8 (Assuming uniform wear conditions) =H₁*W*R JANNER RANGARaheb Main eginal (Assuming uniform pressure conditions) 197 50 mm

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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Q3) The screw, as shown is operated by a torque applied to the lower end.
The nut is loaded and prevented from turning by guides. Assume friction in
the ball bearing to be negligible. The screw is a triple-start trapezoidal
thread. The outside diameter of the screw is 48 mm and the pitch is 8 mm.
The coefficient of friction of the threads is 0.15. For trapezoidal threads, 2
B=30°) Find:
1. Load which can be raised by a torque of 40 N-m; and
W
8 W.C.n
Pb
G.d
ndin
2. Average bearing pressure between the screw and nut thread surface.
T; = 23 x 1, XW [
(R₁) ³ - (R₂)³]
(R₁)²-(R₂)²]
8
(Assuming uniform wear conditions)
=H₁XWXR
TRANSPRAR PARAhabinoin crime
(Assuming uniform pressure conditions)
***********
ke
50 mm
Transcribed Image Text:Q3) The screw, as shown is operated by a torque applied to the lower end. The nut is loaded and prevented from turning by guides. Assume friction in the ball bearing to be negligible. The screw is a triple-start trapezoidal thread. The outside diameter of the screw is 48 mm and the pitch is 8 mm. The coefficient of friction of the threads is 0.15. For trapezoidal threads, 2 B=30°) Find: 1. Load which can be raised by a torque of 40 N-m; and W 8 W.C.n Pb G.d ndin 2. Average bearing pressure between the screw and nut thread surface. T; = 23 x 1, XW [ (R₁) ³ - (R₂)³] (R₁)²-(R₂)²] 8 (Assuming uniform wear conditions) =H₁XWXR TRANSPRAR PARAhabinoin crime (Assuming uniform pressure conditions) *********** ke 50 mm
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