There are many times when you need to drill a hole only so far -- and no deeper. Either it's a "break-through" issue, or you're doing some production holes that have to be the same equal depth. This is easy enough with a drill press
fitted with a dial-in depth stop.
But what to do if you don't have a drill press, or just as bad, the workpiece won't fit in it? This can easily be the case with a tabletop drill press
You just have to DIY. All you need is your hand-held drill, the proper drill bit
, and a roll of tape: electrical tape, duct tape, or masking tape
-- your choice.
Simply measure the depth of the desired hole from the tip of your drill bit, and make a couple of wraps of tape around the bit. When your drill bit is spinning, the tape will blur into a perfect line. All you have to do is drill slowly, and back off just as you approach it!