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National Stock Number:
5133-01-050-7946
Federal Supply Class:
5133
National Item Identification Number:
010507946
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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Techincal Specification:
| CUTTING END STYLE | INTERCHANGEABLE PILOT | | FLUTE QUANTITY | 3 | | HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM | | OVERALL LENGTH | 5.375 INCHES NOMINAL | | MATERIAL | STEEL OVERALL | | NOMINAL CUTTING DIAMETER | 0.8750 INCHES | | SHANK DIAMETER | 0.750 INCHES NOMINAL | | SHANK STYLE | STRAIGHT ROUND |
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