drill
I'm drilling holes in 4"x4"s in order to put magnets in them. The magnets are 1/8" deep and I'd like to install them to be flush with the surface of the wood. All I have is a Ryobi cordless drill and my bit set.
How can I drill only to a certain depth into the wood? Using a drill press would be great, but I don't have the money or the space to house one at this time.
Do you need more shelves, or do you just need one of the existing shelves to be at a different height?
If it's the latter, it may be easier for you to add some supports underneath one of the existing shelves like this:
The supports should run the depth of the cabinet, and you can attach them with command strips or double-sided tape. Be careful removing them because shelves are often covered with paper that's printed to look like wood.
If you need more shelves, it may be better for you to build a new shelf using the same idea, but have the new shelf resting on one of the existing ones. You'd lose a little bit of space on the lower shelf, but you'd avoid the risk of breaking your rental agreement and/or losing your deposit. You'd also need to be careful not to overload the lower shelf or the whole thing could come down.
They sell what is called an "Offset" drill. Instead of the chuck being inline with the motor, it is turned 90°.
They also make drills where the chuck can be turned to get into tight spots. They also make an offset attachment for most drills.
Best Answer
Homemade Stops
Wrap a bit of tape around the bit, to mark the desired depth. Then carefully drill your holes, stopping when you've reached the tape.
I've also seen this done with a bit of wire.
WARNING: Wrapping the wire in the wrong direction, can lead to property damage, injury, and death.
Store Bought Stops
Or you could purchase a drill stop.
Which are also available in plastic
Portable Drilling Guide
There are also portable drilling guides available.
I tried one of these and it was total crap, so I wouldn't recommend it. Your mileage may vary though, so give it a try if you like.