17
Round Correction Factors
Corrections
to
be
added
to
test
results
in
the
following
scales
for
various
diameter
parts.
Corrections to be added to Rockwell C, A and D values
Diameter
of
Convex
Cylindrical
Surfaces
Hardness
Reading
¼”
6.4mm
3/8”
10mm
½”
13mm
5/8”
16mm
¾”
19mm
7/8”
22mm
1”
25mm
1
‐
1/4”
32mm
1
‐
1/2”
38mm
Corrections to be added to Rockwell B, F and G values
Diameter
of
Convex
Cylindrical
Surfaces
Hardness
Reading
¼”
6.4mm
3/8”
10mm
½”
13mm
5/8”
16mm
¾”
19mm
7/8”
22mm
1”
25mm
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
6.0
5.5
5.0
4.0
3.5
3.0
2.5
2.0
1.5
1.5
1.0
1.0
0.5
0.5
0.5
4.5
4.0
3.5
3.0
2.5
2.0
2.0
1.5
1.0
1.0
1.0
0.5
0.5
0.5
0
3.5
3.0
2.5
2.0
2.0
1.5
1.5
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0
2.5
2.5
2.0
1.5
1.5
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0
0
2.0
2.0
1.5
1.5
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0.5
0
0
1.5
1.5
1.5
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0.5
0
0
0
1.5
1.0
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0.5
0
0
0
0
1.0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0
0
0
0
0
0
0
1.0
1.0
0.5
0.5
0.5
0.5
0.5
0
0
0
0
0
0
0
0
0
10
20
30
40
50
60
70
80
90
100
12.5
12.0
11.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.5
8.5
8.0
7.5
6.5
6.0
5.5
5.0
4.0
3.5
3.0
2.5
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
5.5
5.0
4.5
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.5
4.5
4.0
4.0
3.5
3.0
3.0
2.5
2.0
1.5
1.5
1.0
3.5
3.5
3.5
3.0
2.5
2.5
2.0
2.0
1.5
1.5
1.0
3.0
3.0
3.0
2.5
2.5
2.0
2.0
1.5
1.5
1.0
0.5
Summary of Contents for 900-365
Page 9: ...5 For 900 366 Only...
