Singer 31-15 (What is this bracket for?...)

[graywolf]

Oil can probably looked like this one:

[dikman]

Dani, if you lay the two hooks on top of each other you should be able to see what needs grinding. I used a Dremel with a thin cutting disc and gradually removed metal from the throat area at the base of the hook. Mine did exactly the same as you describe.

This should show you where it needs opening up. It was a matter of trial and error, comparing the old and new, removing a bit of metal, trying the fit, then removing a bit more etc. (This is the original hook).

Edited August 5, 2016 by dikman