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National Stock Number:
5133-01-051-6684
Federal Supply Class:
5133
National Item Identification Number:
010516684
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:
| 3000-0250 | 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 | | 50700 | 42970 | LEAR SIEGLER INC NATIONAL TWIST DRILL AND TOOL DIV | | 62-10031 | 71485 | UNION BUTTERFIELD CORP P O BOX 9000 CRYSTAL LAKE IL 60039 | | 4702 | 71485 | UNION BUTTERFIELD CORP P O BOX 9000 CRYSTAL LAKE IL 60039 | | C3000-0250 | 1NEX4 | KENNAMETAL INC. DIV KENNAMETAL INDUSTRIAL PRODUCTS GROUP |
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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 | 0.234 INCHES NOMINAL | | OVERALL LENGTH | 3.812 INCHES NOMINAL | | NOMINAL CUTTING DIAMETER | 0.2500 INCHES | | FLUTE QUANTITY | 3 | | FEATURES PROVIDED | REPLACEABLE PILOT | | PILOT HOLE NOMINAL DIAMETER | 0.094 INCHES | | PILOT DIAMETER | 0.125 INCHES MINIMUM AND | | 0.188 INCHES MAXIMUM |
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