Singer 45k 92 Flat bed

[Quade]

Quote

You can try to tap a new larger thread and insert a screw BUT you only have 1 try. When the threading is a little offset you will not be able to adjust a matching forward and reverse stitch length anymore and the forward and reverse function then IMO is useless. If it was me I would NOT do it.

I agree it's a bit risky.

Quote

  threads are 11/32" x 28tpi.   threads 20mm long  bulb end on the screw.  

Someone more skilled than me on a lathe could cut you a bolt with this thread pitch. 

Choices seem to be:

1 - Find the bolt

2 - Make the bolt

3 - Rig something up (tap or timesert). 

Or else not use this machine. 

 

[shoepatcher]

You could take a 3/8 bolt and turn it down on a lathe and put the threads in it.  A machinist can do it if you cannot.  You need it to run the machine.    Have a nut made as well.

glenn

[Tingo]

Quick progress report. So I decided to bite the bullet and tapped the hole to 3/8  similar thread pitch. Once I timed the machine properly, fingers crossed. I believe I am good

[Tingo]

A quick progress report, I bit the bullet and tapped the hole out and install a screw size that's is readily available. Included are some pictures. I might get a little handle welded on to the nut at a later date.

[Quade]

Looks good.     If I could I'd replace every screw in my machine with a decent metric screw. 

[Tingo]

Yep. I will look into doing just that