Harbor Freight Tools 93722 - Manual (Page 7)

SKU 93722 For technical questions please call 1-800-444-3353 Page 7
Using the battery locks and Removing the Battery
1. After placing the Battery in the tool, battery locks on the side of the Battery
engage to prevent the battery from coming out accidentally.
2. To remove the Battery, depress the battery locks and remove the Battery by
pulling straight out.
Special Drive System (SDS)
SDS bits use a cylindrical shank, with indents held by the chuck. To install a bit,
pull the Chuck back, insert the bit, then press the chuck forward to lock the bit in
place. To remove the bit, pull the Chuck back, pull the bit straight out, and release
the Chuck.
The SDS system has the advantage of a spring-loaded chuck, so that bits can be
chucked with a simple and quick hand action. Further, the bit and chuck are
uniquely suited to hammer drilling in stone and concrete. While the drill bit is held
solidly in the chuck, it can slide forward and back like a piston. The hammer of the
drill acts to accelerate only the drill bit itself, and not the large mass of the chuck.
That makes hammer drilling with an SDS-plus drill bit much more productive than
with other types of bits. SDS bits are most often used for masonry drilling, for which
hammer drilling action is most helpful.
SDS bits use sliding keyways that open to the end of the bit, which mate with keys
in the chuck. There are additional indents on the bit that are grasped by the chuck
to prevent the drill bit falling out. The
hammer of the drill hits the flat end of
the bit. NOTE: To allow the bit to freely
slide in the chuck, the shank of the bit
must be lubricated with grease.
SDS is available in three sizes, SDS,
SDS-plus, and SDS-max. SDS-plus is
the most common type, with masonry
drills from 5 mm diameter to 30 mm
diameter ordinarily available. The
shortest SDS-plus masonry drill bits
are about 110 mm overall length, and
the longest 1000 mm. If extra long bits are used, a shorter bit must be used first to
start the hole.
CAUTION: Use only SDS-Plus bits with this tool.
SDS-plus chuck operation