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National Stock Number:
5133-01-050-6044
Federal Supply Class:
5133
National Item Identification Number:
010506044
Description:
COUNTERBORE,MACHINE
Detail:
An end cutting tool having two or more cutting edges with flutes or grooves for the passage of cuttings, an integral or removable holder designed for adaption to the end of a machine spindle. The flutes or grooves are usually helical to give a positive rake at the cutting edges. It is designed to form a flat-bottomed enlargement of the mouth of a previously formed cylindrical hole. For items requiring a holder but the holder is not included, use CUTTER, COUNTERBORE.
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Manufacturer Information:
| 3000-0500 | 13130 | CLEVELAND TWIST DRILL CO DIV OF GREENFIELD INDUSTRIES INC | | 3230 | 42970 | LEAR SIEGLER INC NATIONAL TWIST DRILL AND TOOL DIV | | 879 | 13130 | CLEVELAND TWIST DRILL CO DIV OF GREENFIELD INDUSTRIES INC | | 879 | 1NEX4 | KENNAMETAL INC. DIV KENNAMETAL INDUSTRIAL PRODUCTS GROUP | | C3000-0500 | 1NEX4 | KENNAMETAL INC. DIV KENNAMETAL INDUSTRIAL PRODUCTS GROUP | | 50708 | 42970 | LEAR SIEGLER INC NATIONAL TWIST DRILL AND TOOL DIV | | EDP50708 | 42970 | LEAR SIEGLER INC NATIONAL TWIST DRILL AND TOOL DIV |
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Techincal Specification:
| MATERIAL | STEEL OVERALL | | HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND | | 53.0 ROCKWELL C MAXIMUM | | CUTTING END STYLE | INTERCHANGEABLE PILOT | | SHANK STYLE | STRAIGHT ROUND | | SHANK DIAMETER | 0.438 INCHES NOMINAL | | OVERALL LENGTH | 4.312 INCHES NOMINAL | | NOMINAL CUTTING DIAMETER | 0.5000 INCHES | | FLUTE QUANTITY | 3 | | FEATURES PROVIDED | INTEGRAL PILOT | | PILOT DIAMETER | 0.250 INCHES MINIMUM AND | | 0.438 INCHES MAXIMUM |
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