A-A-52535
November 7, 1995
SUPERSEDING
MIL-D-52121B
14 November 1974
COMMERCIAL ITEM DESCRIPTION
DRILL, PNEUMATIC, SINKER, ROCK
The General Services Administration has authorized the use of this commercial item
description (CID) for all federal agencies.
1. SCOPE. This commercial item description (CID) applies to a single type of portable
pneumatic drill in the 55 pound weight class. The drill is intended for drilling rock, brick and
concrete in general construction and maintenance work.
2. SALIENT CHARACTERISTICS.
2.1 Description. The pneumatic rock drill shall use a hollow-centered drill rod having collared
hexagon shanks. The drill shall be a dry-blower, self-rotating type, intended for use with hollow-
centered drill rod having 1-inch across-the-fiats hexagon shanks with 1.5 inch diameter collars.
The drill shall operate on air pressures ranging from 70 to 100 pounds per square inch gage
(psig). The drill shall be cushioned against vibration and shall consist of a backhead, cylinder,
and fronthead.
Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any other
data which may improve this document should be sent by letter to: U.S. Army Tank-automotive
and Armaments Command, ATTN: AMSTA-TR-E/BLUE, Warren, MI 48397-5000.
FSC 3820
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
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