I have a Chip Hyde Vision 3D that is no longer made. The anti rotation pins are going bad. The manual doesn't specify the size, however, with a ruler it looks like 3/4 inch.
Who has these for sale?

Take that to a hardware store and see if they have anything like them. Those should have been made with a socket head so that stripping out doesn't happen.

If that fails, take a file and flatten out the top, and use a dremel with a cut-off wheel or a hack saw and cut in a new slot.

Jigeye, I doubt that the hardware store is going to have these. I found a review by goggeling the name and they had a quick mention of these screws but no data on them. There is a company in the UK that advertises the plane, they may have a parts source.
http://www.probuild-uk.co.uk/product...e/vision3d.php THe Chip Hyde site is a gonner.

For now, I would use JRcaster's suggestion of cutting the slot deeper with a hack saw Just be careful that you don't bugger up the threads when doing this. Aslo with an aluminum slot like this, it is very important to have an exact fit screw driver and one that is sharp.

The photo of the screw looks as if it isnt a standard V thread, but maybe a form of acme thread, Flat top and bottom of the threads.

If you could get some accurate dementions, including screw pitch and thread form, it shouldn't be to expensive to have a couple made for you. One of your local machine shops might help you out. The angel of the cone is going to be critical though so the interaction to the pin is correct.

If all else fails, you may be able to fabercate a new lock setup. IE remove the pin and get a bolt of the same thread size and pitch and drill through the large block the screw you show in the photos and put the bolts through and screw them into the wing each time. That of course assumes that you have room for the bolts and the the female threads in the wings will stand repeated screw application.


Could you take a couple more photos and side view of the screw and a closeup of the thread form.

Don