A-A-51137B
3.4 Boring bars.
3.4.1 S-T series. Unless otherwise specified (see7.3(e)), solid forged bars with tool numbers shall conform to table VI.
TABLE VI. Solid boring tools for type I, style A tool holders.
|
Boring tool number |
Diameter of boring tool (inches) |
Length of boring tool (inches) |
Width of cutting face (inches) |
Applicable tool holder number (see table I) |
S-T-1 |
3/16 |
4 |
5/16 |
10 |
S-T-2 |
1/4 |
5 |
17/32 |
10 |
S-T-3 |
3/16 |
4-1/2 |
7/16 |
11 |
S-T-4 |
5/16 |
6 |
5/8 |
11 |
S-T-5 |
1/4 |
5 |
17/32 |
12 |
S-T-6 |
3/8 |
7 |
3/4 |
12 |
S-T-7 |
5/16 |
6 |
5/8 |
13 |
S-T-8 |
7/16 |
8 |
7/8 |
13 |
3.4.2 P-B series. Unless otherwise specified (see 7.3(e)), plain bars having tool bit channels of
90 degrees and 45 degrees at opposite ends of the bar with tool numbers shall conform to table
VII.
TABLE VII. Plain boring bars.
|
Number of plain bar |
Diameter of boring bar (inches) |
Length of boring bar (inches) |
Square tool bit |
||
Cross section (inches) |
Length (inches) |
||||
Straight 90 degree |
Angular 45 degree |
||||
P-B-1 |
1/2 |
8 |
3/16 |
1 |
2 |
P-B-3 |
5/8 |
9 |
3/16 |
1 |
2 |
P-B-4 |
3/4 |
11 |
1/4 |
1-7/32 |
2-1/2 |
P-B-5 |
1 |
13 |
5/16 |
1-7/16 |
2-1/2 |
P-B-6 |
1-1/4 |
18 |
3/8 |
1-13/16 |
3 |
P-B-10 |
1-1/2 |
23 |
1/2 |
2-1/2 |
4 |
P-B-12 |
1-3/4 |
28 |
5/8 |
3-1/4 |
4-1/2 |
P-B-13 |
2-1/4 |
34 |
5/8 |
3-1/4 |
4-1/2 |
P-B-14 |
2-1/4 |
31 |
3/4 |
4-3/4 |
5 |
5
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