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Machine Design

Machine Design
The included angle for the British Association thread is

29°
60°
47.3°
55°

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Machine Design
The acme threads are usually found on

Feed mechanism of machine tools
Railway carriage couplings
Spindles of bench vices
Screw cutting lathes

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Machine Design
The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for

Ease of manufacture
Fullering and caulking
Safety
Reducing stress concentration

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Machine Design
Allen bolts are

Used in aircraft application
Provided with hexagonal depression in head
Designed for shock load
Self locking bolts

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Machine Design
In helical gears, the distance parallel to the axis, between similar faces of adjacent teeth, is called

Normal pitch
Diametral pitch
Axial pitch
Module

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Machine Design
In a steam engine, the piston rod is usually connected to the cross-head by means of a

Universal joint
Cotter joint
Oldham coupling
Knuckle joint

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