Shafting

Question 1

Shear Stress

Accepted Answer

$S_s=\frac{T_c}{J}

Question 2

Section Modulus Solid Shaft

Accepted Answer

$Z=\frac{π}{32}(D³)

Question 3

Section Modulus Hollow Shaft

Accepted Answer

$Z=\frac{π}{32D_o}(D⁴-d⁴)

Question 4

Polar Moment of Inertia Solid Shaft

Accepted Answer

$J=\frac{\pi}{32}D^4

Question 5

Polar Moment of Inertia Hollow Shaft

Accepted Answer

$J=\frac{\pi}{32}(D_o^4-D_i^4)

Question 6

Shear Stress Solid Shaft

Accepted Answer

$S_s=\frac{16T}{\pi D^3}

Question 7

Max Shear Stress (outside)

Accepted Answer

$S_s=\frac{16TD_o}{\pi (D_o^4-D_i^4)}

Question 8

Min Shear Stress (inside)

Accepted Answer

$S_s=\frac{16TD_i}{\pi (D_o^4-D_i^4)}

Question 9

Polar Section Modulus

Accepted Answer

$Z_p=\frac{π}{16}D^3

Question 10

Power

Accepted Answer

$P=2πTN

Question 11

Power SI

Accepted Answer

$P=\frac{NT}{9.549x10^6}

Question 12

Power English

Accepted Answer

$P=\frac{NT}{63025}

Question 13

Main Power Transmitting shaft (4000psi)

Accepted Answer

$P=\frac{ND^3}{80}

Question 14

Lineshaft carrying pulleys (6000 psi)

Accepted Answer

$P=\frac{ND^3}{53.5}

Question 15

Short shafts, small, countershafts (8500 psi)

Accepted Answer

$P=\frac{ND^3}{38}

Question 16

Torsional Deflection

Accepted Answer

$	heta=\frac{TL}{JG}$ TaLong ni Janno Gibbs

Question 17

Torsional Deflection given G

Accepted Answer

$	heta=\frac{2S_sL}{GD}$ $S_s=\frac{G 	heta D}{2L} $ GOD2Long

Question 18

Modulus of Rigidity

Accepted Answer

$G=12x10^6 psi

Question 19

Shear Stress (Bolts) Couplings

Accepted Answer

$S_s=\frac{8T}{πd^2D_bn}

Question 20

Compressive Stress (Flange) Couplings

Accepted Answer

$S_c=\frac{2T}{dtD_bn}

Question 21

Maximum Shear Stress Shaft

Accepted Answer

$Ss=\frac{16}{πD^3}\sqrt{M^2+T^2}

Question 22

Maximum Normal Stress Shaft

Accepted Answer

$S_T=\frac{16}{πD^3}\left(M+\sqrt{M^2+T^2}ight)

Question 23

Equivalent Bending Moment

Accepted Answer

$M_e=\frac{1}{2}\left(M+\sqrt{M^2+T^2}ight)

Question 24

Equivalent Twisting Moment

Accepted Answer

$T_e=\sqrt{M^2+T^2}

Question 25

Length No Bending Action except own weight

Accepted Answer

$L=8.95\sqrt[3]{D^2}

Question 26

Length Subject in bending action

Accepted Answer

$L=5.2\sqrt[3]{D^2}

Question 27

Allowable Twist = 0.08°/ft Diameter 2 formulas

Accepted Answer

$D=0.29\sqrt[4]{T}$ $D=4.6\sqrt[4]{\frac{P}{N}}

Question 28

Shear Stress Keys

Accepted Answer

$S_s=\frac{F}{WL}=\frac{2T}{WLD}$ $S_s=\frac{2T}{AD}

Question 29

Compressive Stress Keys

Accepted Answer

$S_c=\frac{4T}{tLD}

Question 30

Torque and Force

Accepted Answer

$T=F\left(\frac{D}{2}\right)$ $F=\frac{2T}{D}

Question 31

Recommended Width of Keys

Accepted Answer

$W=\frac{1}{4}D

Question 32

Stress Formula Using Torque with Diameter na Extra

Accepted Answer

$S=\frac{2T}{AD}

Shafting

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