Is there any fix for a solid brass doorknob with stripped threads? The spindle won’t hold, even when the set screws are tightened all the way.
The knob used to be for a mortise lock. We replaced the door, substituting a spring-loaded catch for the mortise lock. So, the knobs are just for pulling the door open and are never turned.
Janet
Replies
Door Fix
It may be possible to change the spindle but if the spindle is good and it's the sleeve of the knob that's worn maybe you can line up the flat of the spindle and drill another hole to capture the post connecting the spindle in two places.
SA
What is this product for stripped threads?
SA,
There are already two set screws that push on two adjacent sides of the spindle, but the hole is so worn it still doesn't hold tight. However, you got me thinking about filling up some of the space so the spindle has something to push against.
There was a product for stripped threads (in wood, not metal) that I used more than ten years ago. You put it in the stripped hole instead of resorting to a larger screw. They were rectangular pieces of metal, small enough to store in a baby food jar, and thin enough to cut with utility scissors.
The metal was perforated all over to leave burrs (the surface looked a lot like a kitchen grater for nutmeg). It deformed enough to act as threads for the screw, and the burrs gripped the wood and kept it from slipping. "Grip" might be even be part of the name.
Maybe it isn't available anymore, but I was wondering if it would work for my brass doorknob.
From what locksmiths have said on the Internet, brass doorknobs reach a point where they have to be thrown out. These aren't fancy doorknobs, but as they are original to the house I'd like to keep using them.
Janet
Repair
The other thing you can try is to drill a hole through the spindle and insert a brass nut and bolt neatly recessed -
SA
An exellent way of repairing stripped threads is by means of threaded inserts. Google Heli-Coil
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