FlyingMonkey Posted December 8, 2021 Report Share Posted December 8, 2021 Hey all... The plastic "knobs" on my right door were apparently overtightened (by me) at some point, and the screw has stripped the plastic. The knob stays on the door latch, but spins freely instead of being fixed in place. Does anybody know an easy way to repair or replace them? I'm afraid to ask FD-USA what they cost from the factory. Quote Link to comment Share on other sites More sharing options...
Tom Baker Posted December 8, 2021 Report Share Posted December 8, 2021 You could try boring the threads out and installing a threaded insert, or simply get a piece of grey Delrin rod and machine a new knob. Quote Link to comment Share on other sites More sharing options...
Anticept Posted December 8, 2021 Report Share Posted December 8, 2021 The threaded insert is the path I would choose. Plus, the threaded insert will protect from further overzealous ownership Quote Link to comment Share on other sites More sharing options...
FlyingMonkey Posted December 8, 2021 Author Report Share Posted December 8, 2021 5 hours ago, Anticept said: The threaded insert is the path I would choose. Plus, the threaded insert will protect from further overzealous ownership Oh, good call. Any suggestions for a good insert? If you don't have a specific recommendation I'll Google it and find something. Maybe something like this...https://www.mcmaster.com/metric-threaded-inserts/18-8-stainless-steel-easy-to-install-thread-locking-inserts/ Quote Link to comment Share on other sites More sharing options...
Roger Lee Posted December 8, 2021 Report Share Posted December 8, 2021 Why not just fill it with epoxy and just drill and tap it. Quote Link to comment Share on other sites More sharing options...
GrassStripFlyBoy Posted December 8, 2021 Report Share Posted December 8, 2021 Or up size the screw, and tap to a larger size? Quote Link to comment Share on other sites More sharing options...
Anticept Posted December 9, 2021 Report Share Posted December 9, 2021 8 hours ago, FlyingMonkey said: Oh, good call. Any suggestions for a good insert? If you don't have a specific recommendation I'll Google it and find something. Maybe something like this...https://www.mcmaster.com/metric-threaded-inserts/18-8-stainless-steel-easy-to-install-thread-locking-inserts/ Those should work fine. Quote Link to comment Share on other sites More sharing options...
FlyingMonkey Posted December 9, 2021 Author Report Share Posted December 9, 2021 I understand the "fill & drill" methods discussed, but I think that's just a short term solution until I gorilla-wrench them again. Quote Link to comment Share on other sites More sharing options...
Roger Lee Posted December 9, 2021 Report Share Posted December 9, 2021 Re-train the gorilla.:) Quote Link to comment Share on other sites More sharing options...
FlyingMonkey Posted December 9, 2021 Author Report Share Posted December 9, 2021 3 hours ago, Roger Lee said: Re-train the gorilla.:) I've tried...doesn't work. Quote Link to comment Share on other sites More sharing options...
Tom Baker Posted December 9, 2021 Report Share Posted December 9, 2021 I think I would just drill the hole out and glue in a rivnut insert. Quote Link to comment Share on other sites More sharing options...
Anticept Posted December 9, 2021 Report Share Posted December 9, 2021 Locktite 22x, 24x, and 26x, are not designed for plastics, and are generally recommended against their use for that application by Henkel due to the risk of cracking. Loctite 380 can bond metal to some plastics, but Polyoxymethylene (delrin) is not listed. No idea how well it would perform. Cyanoacrylate (superglue) is compatible and fine to use. Quote Link to comment Share on other sites More sharing options...
Roger Lee Posted December 10, 2021 Report Share Posted December 10, 2021 If you put a Rivnut in the hole then you can use Loctite 480 (same Loctite that we use on the plastic aileron bearings (it's black in color) ) or just some good ole epoxy. Quote Link to comment Share on other sites More sharing options...
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