Posted: 2/11/2009 4:30:46 AM EDT
| I've got an older door lock (bedroom) I need to change out. The crossbore is 1 3/4 in and re-drilling for 2 3/8 really isn't an option. Does anybody know anyplace that still carries locksets that would work? I've checked around, and can't find anybody that carries what I need. |
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First.......
What is the current size of the latch hole in your door? Standard is 1" What is the current size of the knob hole in your door? Standard is 2-1/8". This is your bore. What is the measurement from the edge of the door, to the center of the knob hole? Standard is 2-3/8" This is called backset. There are some latches that will fit in a 7/8" hole that are readily available. There are some locksets that sill mount in a 1-7/8" bore that are readily available. There are adjustable latches readily available and many odd sizes through locksmiths. Most "off-shelf" locks at home improvement stores will be set up for a 2-1/8" bore, 2-3/8" backset and a 1" latch. With all these, or possibly some of these questions answered, a solution to your problem will be much easier. If the bore is the issue, I can tell you the easiest way to make the hole bigger. This does not require a grenade launcher. I'm thinking this is your issue. |
| The lockset in question is over 40 years old, the opening in the door is 1 3/4 in dia. I've looked at Kwik set stuff as well as other makes, and they are all made for 2 3/8 openings. It appears all the door hardware specs have changed over the years, I guess I could just buy a cheap bed/bath set, if it didn't fit I wouldn't be out too much. |
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Drill a larger hole in the door.
Take two pieces of scrap 1/4" plywood and clamp then to either side of the door. Mark your new center on the scrap, measured at 2-3/8" for the correct backset for the new knob. Use a 2-1/8" hole saw and drill through the scrap, it'll center the holesaw and give you a clean hole. The scrap on the other side will stop splinters and blowout. Install new unit. Alternative: There is an arbor adapter sold to mount two holesaws on one arbor. It's called an OOPS arbor bushing. I believe Starrett makes them. It'll allow you to mount a 1-7/8" holesaw INSIDE a 2-1/8" holesaw. The small holesaw acts as a pilot for the larger one. |