Part Number
Part Number:
NSN:
NIIN:
Item Name:
COUNTERBORE , MACHINE
Definition:
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.
CAGE Information
| Code | Company |
|---|---|
| 13130 | CLEVELAND TWIST DRILL CO DIV OF GREE |
Federal Supply Class
Title
DRILL BITS, COUNTERBORES, AND CO
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| ABHP | OVERALL LENGTH | 6.625 INCHES NOMINAL |
| AKZK | TAPER SHANK SIZE DESIGNATOR | 3 MORSE |
| ALAR | FLUTE QUANTITY | 5 |
| CBBL | FEATURES PROVIDED | REPLACEABLE PILOT |
| MATT | MATERIAL | STEEL, HIGH SPEED OVERALL |
| AAZF | SHANK STYLE | STANDARD TAPER W/TANG |
| AKZH | CUTTING END STYLE | INTERCHANGEABLE PILOT |
| AKZQ | PILOT HOLE NOMINAL DIAMETER | 0.375 INCHES |
| AAVL | PILOT DIAMETER | 0.438 INCHES MINIMUM AND 1.188 INCHES MAXIMUM |
| AKZL | NOMINAL CUTTING DIAMETER | 1.2500 INCHES |