Collection:
Juneau—Douglas City Museum
Object ID:
2007.22.054
Accession#:
2007.22
Credit Line:
Transferred from the U.S. Bureau of Land Management.
Object Name:
Bit
Title:
Tricone Drill Bit
Year Range from:
1950
Year Range to:
1996
Description:
Tricone Roller Drill Bit
Silver drill bit. The top is cylindrical in shape and is threaded to screw into a drill. It is hollow and has the numbers "9947 / 0" written on the top. The lower half is comprised of three arms that have gears at the end. Each gear has a different format of teeth.
Used for obtaining rock chip samples.
Silver drill bit. The top is cylindrical in shape and is threaded to screw into a drill. It is hollow and has the numbers "9947 / 0" written on the top. The lower half is comprised of three arms that have gears at the end. Each gear has a different format of teeth.
Used for obtaining rock chip samples.
Notes:
Dirt from its last job still coats the teeth and shoulders of the object.
Search Terms:
Mining
Prospecting
JMIC
T&E
Prospecting
JMIC
T&E
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2007.22.054
2007.22.054