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 |
|---|---|
| 71485 | UNION BUTTERFIELD CORP P O BOX 9000 |
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| AAZE | SHANK DIAMETER | 0.500 INCHES NOMINAL |
| ABHP | OVERALL LENGTH | 5.125 INCHES NOMINAL |
| ALAR | FLUTE QUANTITY | 3 |
| MATT | MATERIAL | STEEL OVERALL |
| AKZQ | PILOT HOLE NOMINAL DIAMETER | 0.188 INCHES |
| CBBL | FEATURES PROVIDED | REPLACEABLE PILOT |
| CQFM | HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM |
| AKZH | CUTTING END STYLE | INTERCHANGEABLE PILOT |
| AAVL | PILOT DIAMETER | 0.250 INCHES MINIMUM AND 0.562 INCHES MAXIMUM |
| AAZF | SHANK STYLE | STRAIGHT ROUND |
| AKZL | NOMINAL CUTTING DIAMETER | 0.6250 INCHES |