Virtual Labs

p/4 sec x/2 p/12 tan x/4 p/6 cosec x/6 p/4 tan x/12

temperature indicator micrometer indicator fiducial indicator torque indicator

Each flank of a thread is touched by a wire in axial plane section in the three-wire approach, which is valid only for a thread with rank angle. The effective diameter value obtained is always deducted from the compression error. When determining the optimal wire diameter for Whitworth thread, the value of is considered to be 30 degree. For the two-wire approach, a floating carriage is employed.

major dia pitch cylinder minor dia crest dia

stop the spindle further movement uniform pressure maintained give measurements correctly move the anvil

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