Owner's manual

114

apx
=
a
p
nap - 1
√

√

5
. T
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hni
ca
l r
efe
r
e
n
ce
Formulas
Use the following formulas as a reference for successful thread
machining.
Thread turning formulas
Infeed
(Manual formulas, when not using the Sandvik Coromant calculator)
Δap = Radial infeed
X = Actual pass (in a series from 1 to nap)
a
p
= Total depth of thread + extra stock
nap = Number of passes
 = 1st pass = 0.3
2nd pass = 1
3rd and higher = x-1