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National Stock Number:
3820-00-427-0413
Federal Supply Class:
3820
National Item Identification Number:
004270413
Description:
BIT,ROCK DRILL
Detail:
A DETACHABLE, END CUTTING DRILLING TOOL WITH AN INTERNAL THREAD OR TAPERED SOCKET AT ONE END FOR ATTACHING A ROCK DRILL ROD. THE OPPOSITE END IS DESIGNED WITH TWO OR MORE CUTTING EDGES FOR DRILLING INTO ROCK FORMATION BY IMPACT AND A SLIGHT ROTARY MOTION. IT CONTAINS A HOLE OR HOLES IN THE CUTTING FOR THE PURPOSE OF CONDUCTING AIR OR WATER TO CLEAR THE HOLE BEING DRILLED. IT IS USED WITH POWERED DRIFTER DRILLS, SINKER DRILLS, AND THE LIKE.
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Manufacturer Information:
| 17250-52A | 40983 | TRW INC TRW MISSION DRILLLING PRODUCTS DIV |
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Techincal Specification:
| DRILLED HOLE DIAMETER | 2.250 INCHES |
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