

Hilti's TE-S system is similar to these SDS systems, but is designed for chipping only (no rotation) in tools for applications larger than could be handled by SDS-Max (e.g. SDS-Top with 14 mm diameter has been largely phased out in North America and is not common except for older tools. Standard lengths are 12 to 21 inches (300 to 530 mm). SDS-max is more common for larger rotary hammers and chipping guns, and common sizes start at 1⁄ 2 inch (13 mm) diameter up to 1 + 3⁄ 4 inches (44 mm) diameter. The shortest SDS-plus masonry drill bits are about 110 mm overall length, and the longest 1500 mm. SDS-plus is the most common by count of tools manufactured, with masonry drills from 4 mm diameter to 30 mm (and from 5/32" to 1-1/4") diameter ordinarily available. There are four standard sizes of SDS: SDS Quick, SDS-plus (or SDSplus or SDS+), SDS-Top and SDS-max. The shank must be lubricated with grease to reduce the friction of the sliding action in the chuck. The hammer of the drill hits the flat end of the shank. The smaller indentations that do not open to the end are grasped by the chuck to prevent the drill bit falling out. Rotational drive uses the sliding keyways that open to the end of the shank, which mate with keys in the chuck.

The hammer of the drill acts to accelerate only the drill bit itself, and not the large mass of the chuck, which makes hammer drilling with an SDS shank drill bit more productive. The drill bit is not held solidly in the chuck, but can slide back and forth like a piston it does not slip during rotation due to the non-circular shank cross-section, matching the chuck. SDS shank and chucks are made to be used for hammer drilling with masonry drills in stone and concrete. The SDS shank is simply pushed into the spring-loaded chuck without tightening. The SDS Max is larger with an 18 mm shank diameter, while the SDS Quick has a smaller 6 mm shank diameter.
#Different types of drill bits chart plus#
The diameter of a SDS Plus shank is 10 millimeters. Torque transmission limited by slipping of cylindrical shank.Can also be held in a collet chuck (which must be tightened), particularly for smaller sizes.

#Different types of drill bits chart full#
Large drill bits can have straight shanks narrower than the drill diameter so that they can be fitted in chucks not able to chuck the full diameter. Bits of diameter too small to grip firmly can have straight shanks of larger diameter than the drill, which can be held firmly in a standard size collet or chuck. It is held usually in a three-jaw drill chuck. The whole of the drill bit, shaft and shank, is usually of the same diameter. The straight shank is the most usual style on modern drill bits, by number manufactured.
