our underlay material has tight thickness and flatness tolerances. It contain no abrasives that could increase drill wear. or contaminates that could evacuated through the drilled hole. The surface is smooth and hard to suppress exit burrs.
Drilling tools for PCB
Brace & Bit Drill
carpenters and craftspeople drilled holes by hand using a "brace and bit." The brace, which is approximately one foot long, has a chuck on one end to hold the bit. and a knob (or grip) on the other end to enable the carpenter or craftsperson to. apply pressure to drive the bit into the wood.
The middle part of the brace is offset, enabling the operator to turn the brace and bit around. and around in a clockwise direction, thereby drilling the hole.
brace with chuck on one end and handle on other end
Brace with a knob/grip on one end
and a chuck on the other
Brace with a bit inserted into the chuck
Brace and bit drilling a hole
Drilling a hole with a brace and bit
The brace and bit is seldom used now. but the same concept applies to drilling holes by hand using a hand-operated drill driver. The drill driver has a crank, which powers a gear mechanism, which turns the chuck and bit. This tool is inexpensive and easy to use in tight working spaces.
Hand-operated drill with crank
Hand-operated drill in use
Drilling a hole with a hand-operated drill driver
Battery-Powered Cordless Drill Driver
Drills powered by electric motors became used many years ago. but they have replaced in recent years by battery-powered cordless drill drivers. These battery-powered devices can also used to drive in wood screws.
Battery-powered cordless drill
Drilling a hole with a battery-powered cordless drill
Some woodworkers invest in a drill press. The press can sit on a workbench or larger models can sit on the floor. A steel column connects the base to the top of the press. where the motor powering the chuck which holds the bit located. There is a geared mechanism that the operator can use to lower or raise the bit with a lever.
The piece to drilled rests on a table, which attached to the vertical column. The advantage of a drill press is that you can drill holes exactly straight or at preset angles. By using a fence and stop block, you can drill a hole in exactly the same location.