Lathe 1 / n "what does it mean
The 1/4, 1/2, 1/8 mark in the thread refers to the diameter of the thread, in inches.
N / 1 is the engraved thread (how many teeth per inch).
Inch thread, thread standard, British standard BS84 general purpose thread.
According to the shape of the sub-cylinder, cone two; teeth by angle 55 °, 60 ° two.
