What does taper 1:20 mean in an engineering drawing?
Thanks in advance.
It is a reduction in 1mm in radius for every 20 mm of length of shaft.
Formula taper=total length/(major dia - minor dia)
A better answer
It is a reduction in 1mm in diameter for every 20 mm of length of shaft.
K = D-d/L
K = Taper Ratio
D = Larger diameter of the taper
d = Smaller diameter of the taper
L = Length of the taper