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Machine Design

Machine Design
The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)

d/8
d/6
d/4
d/2

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Machine Design
The groove angle of pulleys for V-belt is

340 to 360
300 to 320
More than 400
420 to 450

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Machine Design
The most important dimension in the design of a nut is

Outside diameter
Pitch diameter
Height
Inside diameter

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Machine Design
A screw is specified by its

Pitch
Pitch diameter
Minor diameter
Major diameter

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Machine Design
The number of slots in a 25 mm castle nut is

6
4
8
2

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Machine Design
In a marine flange coupling, the pitch circle diameter of bolts is taken as

2.5 d
1.2 d
2 d
1.6 d

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