[edit] Drill Speeds

Drill speeds are to be selected according to their use, (i.e. small Bit- higher speed, hard material- slow speed.) Speed ranges can be either fixed (one or two speed) or variable.

[edit] Single Speed

Mainly high speed, suited for small diameter drilling, speed range fixed within

2,000-3,000 r.p.m, 0 - 13 mm (1/2”) chuck capacity.

[edit] Dual Speed

Can be used to drill a variety of materials, the speed is changed by movement of a lever or button. The speed range is fixed to give you two speeds only, normally between 750-2500 rpm. The speed is set by a small-pictured pin, lever or switch. Chuck capacities are normally 0 - 13mm (1/2”).

[edit] Variable Speed

These drills enable the operator to select the best cutting speed to suit the material and drill sizes. Speed range varies from 0-3000 rpm with chuck capacity 0-13mm (1/2”). Slow speed, low torque drills can be used as electric screwdrivers.

[edit] Reversible Drills

Movement of a picture pinpoint control switch can reverse some drills. This action is used when removing screws, they can also make stuck drill bits easier to withdraw from the material you are drilling.

Caution: With this type of drill always let the motor stop before reversing the rotation.

[edit] Small Lightweight Industrial Drills

A pistol grip drill designed for one hand operation. Light drilling of wood/metal, plastic or similar materials, counter-sinking and general bench work of a light nature. Large twist drills or bits should not be turned down to fit the chucks of these drills, as overloading may occur.

[edit] Cordless Drills

These drills operate with the aid of a battery power supply. They are capable of most of the functions an electric drill can perform, with perhaps a slight loss of power and/or speed.

The battery life varies according to the type of work the drill is used for. Cordless drills are suited to areas where a conventional power supply (e.g. electricity) is unavailable.

Installation and assembly work are two good examples of the versatility and usefulness of these drills. Over the past few years the humble cordless has experienced many good changes to its development, with better battery life and drill torques now available.

[edit] Hammer Drills

Used for drilling holes in masonry or concrete. These types of drills have a percussion type of action, which assists in drilling masonry type materials.

Generally used for drilling holes to accept anchors, for cupboards, shelve brackets, fixtures and fittings.

[edit] Heavy Duty Industrial Drills

Breast-plate, closed, or pistol grip with side handle.

Fitted with a heavy-duty motor and bearings, and can be used for heavier work of a similar nature to the above lightweight drill, the chuck capacity may also be greater.

[edit] Angle Drill

Ideal for drilling in tight corners or difficult access areas. With some models the head is removable so the drill can be used as a straight-line unit, the chuck capacity of the drill is generally quite limited.