Harbor Freight Tools 93722 operating instructions Special Drive System SDS

SDS-plus chuck operation

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.

SKU 93722 For technical questions please call 1-800-444-3353 Page 7