Quote:
Originally Posted by PaulRotheram
Whats the best method to remove a rounded grub screw in a drive shaft without damaging parts?
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Is it just the rounded head, or also Dirt, rust, threadlock, (CA) glue? If so, clear it out first.
- For Dirt and rust, soak the piece in WD-40 or penetrating oil for a few days. It might not work in all cases, but it can't harm to give it a shot.
- For Threadlock, I'd recommend heating the cross-joint so the threadlock burns/disintegrates. Heating up the steel may undo it's heat treatment, so I can't guarantee it won't affect the durability of the driveshaft.
- For CA glue, I'd recommend soaking in acetone.
Also, is the cross-joint easy available? And would it harm to have a small slot in there? You might be able to use a cutting disc of a Dremel: If it's worn down the diameter is nice and small, and should barely cut into the shaft or axle, and only into the screw and cross-joint.
Lastly, an alternative might be to drill a hole into the center of the grub screw. It will weaken it, so if you can somehow still apply a rotational force the screw may collapse/disintegrate. If that doesn't work, you could try to drill it out further until it falls apart without additional force, or up to 2.5mm so you can perhaps tap out the grub screw material?
