A-A-51137B
2.3 Size. The dimensional features of the tool holders shall be in accordance with tables I, II, III, IV, and V as needed for the type, style, and size specified. The tolerances of all dimensional features shall conform to those identified on the supplier's parts drawings except where a tolerance range is shown in the tables. The size shall be as specified (see 7.3(d)) and is
described herein as follows:
TABLE I. Type I, style A shank mounted reversible tool holder.
Tool holder size |
Thickness of shank (inches) |
Height of shank (inches) |
Length of shank (inches) |
Diameter of boring tool accommodated (inches1) |
Dimensions square bit accommodated (inches) |
||
Min. |
Max. |
Cross section |
Length |
||||
10 |
3/8 |
3/4 |
3-3/8 |
3/16 |
1/4 |
1/4 |
2-1/2 |
11 |
1/2 |
1 |
3-3/4 |
3/16 |
5/16 |
5/16 |
2-1/2 |
12 |
5/8 |
1-1/4 |
4-3/8 |
1/4 |
3/8 |
3/8 |
3 |
13 |
3/4 |
1-1/2 |
4-5/8 |
5/16 |
7/16 |
7/16 |
3-1/2 |
1See table VI for solid boring tool dimensions.
TABLE II. Type I, style B shank mounted clamp block tool holder.
Tool holder size |
Thickness of shank (inches) |
Height of shank (inches) |
Length of shank (inches) |
Diameter of boring bar accommodated (inches1) |
|
Min. |
Max. |
||||
20 |
3/8 |
3/4 |
3-3/4 |
1/4 |
5/8 |
21 |
1/2 |
1-1/8 |
4-5/8 |
1/4 |
3/4 |
22 |
5/8 |
1-3/8 |
5-1/2 |
3/8 |
15/16 |
23 |
3/4 |
1-5/8 |
6-3/8 |
1/2 |
1-1/8 |
1See table VII for dimensions of square tool bits.
2
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