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There are one-way (non-reversible) and two-way (reversible) drills. Mine is one-way. Methods for chuck removal are different for these two types. Procedure for one-way (non-reversible) drills: Drills of this type have no chuck screw, so one have to hold the spindle with a wrench, than to sharply strike the wrench with a hammer to spin it off. Procedure for two-way (reversible) drills: Open the chuck up and in the bottom is a screw that holds the chuck on
the shaft.The screw turns in a clock wise motion to be removed and then
you can top the chuck off the shaft.
There are cordless varieties of just about any type of hand drill, even the specialized hammer drill. These hammer drills work in the same manner as any of the core hammer drills or regular drills. Powered by a set of rechargeable batteries.
Basically yes. Lower power units are usually titled as "hammer drills." Higher power units, usually labeled "rotary hammers," tend to be larger and provide bigger impact forces. But there are a few differences that are worth knowing: The rotary hammer usually have a chisel only feature, for light chiseling and masonry removal. Rotary hammers also have specially designed chucks that only accept bits specifically designed to fit their chuck. The special chuck on a rotary hammer helps hold the drill bit and prevents it from slipping during use.
There are a few features you may want to pay attention to include: A Depth Rod mounted to the drill lets you know when the bit reaches the desired depth; Variable Speed Selection allows you to adjust the drill for specific jobs. Use high speed for small holes and low speed for large holes; Reverse can retrieve a hopelessly stuck bit; Removable Side Handles give the operator better control in normal use, and can be removed in confined spaces.
Two drive systems are available on both the hammer drill and the rotary hammer models: 1. SDS (or Slotted Drive System) bits for hammer drills/rotary hammers allow the bit to slide in the chuck and enhance the hammering action of the tool. For most applications, these bits provide plenty of torque. 2. SDS Max bits are similar to SDS bits, but have larger shanks and come in larger sizes than SDS bits. These powerful bits are useful in industrial applications.