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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

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