Sandvik Coromant Threading - Manual (Page 115)

115

apx
1 =
0.94
5 √
 √ 0.3 = 0.23

apx
1 =
.037
5 √
 √ 0.3 = .009

apx
3 =
0.94
5 √
 √ 2 = 0.59

apx
3 =
.037
5 √
 √ 2 = .023

apx
4 =
0.94
5 √

√ 3 = 0.73

apx
4 =
.037
5 √
 √ 3 = .029

apx
5 =
0.94
5 √
 √ 4 = 0.84

apx
5 =
.037
5 √
 √ 4 = .033

apx
6 =
0.94
5 √
 √ 5 = 0.94

apx
6 =
.037
5 √
 √ 5 = .037

apx
2 =
0.94
5 √
 √ 1 = 0.42

apx
2 =
.037
5 √
 √ 1 = .017
nap = 6
1 = 0.3
2 =1
n = x-1
5. Technical reference
1st pass, infeed
= 0.23 mm
= .009 inch
2nd pass, infeed
0.42 – 0.23 = 0.19 mm
.017 – .009 = .008 inch
3rd pass, infeed
0.59 – 0.42 = 0,17 mm
.023 – .017 = .006 inch
4th pass, infeed
0.73 – 0.59 = 0.14 mm
.029 – .023 = .006 inch
5th pass, infeed
0.84 – 0.73 = 0.11 mm
.033 – .029 = .004 inch
6th pass, infeed
0.94 – 0.84 = 0.10 mm
.037 – .033 = .004 inch
Pitch 1.5 mm
a
p
= 0.94 mm (.037 inch)