Cordless SDS Drill Guide
Whats what in the cordless drill catalogue. Confused by some of the terms used? Unsure if you need rotary stop or hammer stop? Read our simple guide to what the brochure means.
Ah
The Ah figure on a battery indicates how many Amps that battery will supply for one hour. Basically the larger the figure the better.
Anti-Kick(back)
A feature of some drills to stop any recoil on the drill. Enhances user comfort.
Battery
The power source of your cordless sds drill. See our battery guide.
Bit
Any drill that can be used in the drill i.e. 5.5mm sds masonry bit.
Cadmium
A component of NiCad batteries which is not very "green" and is being taxed heavily in Europe
Charger
The unit which puts the power into the battery.
Chuck
The jaws of a standard drill. An SDS drill does not have a chuck in the ordinary sense but an adaptor can be used when you need to drill with straight shank or normal drills
Clutch
The clutch allows the torque to be adjusted on the better drills so as not to overload the dill motor.
Electric Braking
An electronic function which stops the drill motor almost instantly when you take your finger off the trigger.
Hammer Action
The function on masonry drills which hammers the drill forward while turning to promote faster drilling. This function can be selected and deselected via a switch on hammer drills.
Hammer Stop
The name for when the hammer action is deselected.
Reversible Action
The direction of turning can be reversed. More use on a cordless screw driver where screws need to be driven in and taken out.
Rotary Stop
The turning force can be deselected to enable just the hammer action, used for chiselling or chasing.
RPM
The speed of the drill in revolutions per minute This figure is generally quoted as a "No Load Speed" which is when the drill is turning in free air.
Single Speed
A drill with one speed usually only found on very cheap drills.
Torque
The turning force of the drill. Many drills have variable torque and as a general guide the higher the voltage the greater the torque.
Variable Speed
This means the drill has different speed settings allowing for a greater range of jobs to be done. Speed control may be set via a switch, a turning collar or through the trigger.
Voltage
The voltage of the battery practically determines the power and torque of the drill so a 12V drill is ok for small holes in wood or thin metal but you need at least 24V for masonry.