09-12-2021, 09:37 PM
BSTP
The british standard whitworth form of thread with 55 deg thread angle is used. one sixth of the sharp vee is truncated at the top and bottm, the threads being rounded equally at the crests and roots to a radius equal to 0.17329 times the pitch.
The standard taper of the BS taper pipe thread is 1 in 16.
The flanks of the BS whitworth thread make equal angles with the axis of the pipe or screw. ( bs no 21-1938 )
BSW.
this thread form has been standardised by the british standards institution ( bs no 84-1940 ) and it is used for bs whitworth, bs fine and bs pipe parallel. it is of symetrical vee form with an angle between the flanks measured in the axial plane of 55 degrees.
There are three different fits for BSP though.
information taken from engineering workshop data, Arthur W Judge
Caxton Publishing April 1950.
The british standard whitworth form of thread with 55 deg thread angle is used. one sixth of the sharp vee is truncated at the top and bottm, the threads being rounded equally at the crests and roots to a radius equal to 0.17329 times the pitch.
The standard taper of the BS taper pipe thread is 1 in 16.
The flanks of the BS whitworth thread make equal angles with the axis of the pipe or screw. ( bs no 21-1938 )
BSW.
this thread form has been standardised by the british standards institution ( bs no 84-1940 ) and it is used for bs whitworth, bs fine and bs pipe parallel. it is of symetrical vee form with an angle between the flanks measured in the axial plane of 55 degrees.
There are three different fits for BSP though.
information taken from engineering workshop data, Arthur W Judge
Caxton Publishing April 1950.