Singer 45k 92 Flat bed

[Tingo]

Greetings everyone, I am try to get the dimensions of the screw that locks the stitch size for a Singer 45K92. Attached is a picture of the screw and nut in question. Any help will be appreciated. Thanks much

[Constabulary]

That screw is a stop screw and the nut locks the screw. The screw has a ball tip. I´ll post measures later...

[Tingo]

Is this one for sale by chance?

[Constabulary]

Unfortunately no - it is from the machine in your picture

The screw is 34mm long from underside of the knurled head to the rounded tip. The threaded part is 25mm-26mm long.

EDIT:

Outer diameter is 8.5mm

Edited December 14, 2022 by Constabulary

[billybopp]

6 minutes ago, Constabulary said:

Unfortunately no - it is from the machine in your picture

The screw is 34mm long from underside of the knurled head to the rounded tip. The threaded part is 25mm-26mm long

Correct me if I'm wrong, but didn't Singer generally use proprietary screw sizes and thread pitches?

- Bill

[Quade]

Quote

Correct me if I'm wrong, but didn't Singer generally use proprietary screw sizes and thread pitches?

I actually hate Singer for this.   I had a lathe that used oddball threads like this. It was a nightmare.  I think it was like "mechanical copy protection" back in the day to try to prevent copying. 

I wish my machines had simple metric threads. Even standard SAE threading would be fine.  I loath flat tip screws too.  Was wondering of anyone sold Singer threaded screws and bolts with torx heads. 

It should be possible to use a thread pitch gauge to determine the thread pitch.  Then someone with a lathe could reproduce that bolt. 

[kgg]

4 hours ago, billybopp said:

Correct me if I'm wrong, but didn't Singer generally use proprietary screw sizes and thread pitches?

Yes, this type of thing can drive you nuts just like the screws which go into the top of the cylinder arm of the Juki's LS-1341 and clones like Techsew 2750 or Kobe Ls-1341. It is a "Juki" thread and right now were costing as high as $4.50 CAD ($3.30 USD) each. It took me forever to track down a Chinese copy at what I would consider a reasonable cost.

4 hours ago, Quade said:

Then someone with a lathe could reproduce that bolt. 

The cost of odd ball dies would probably be prohibitive for small runs.

kgg

[shoepatcher]

Get me a screw part number and i can get the specs and pitch of the screw.

glenn

[Tingo]

Can find that screw in the manual at all. Would appreciate the info

[Quade]

Quote

The cost of odd ball dies would probably be prohibitive for small runs.

With a lathe you don't need to use a tap or die.  You set the machine to cut the proper thread spacing by either changing the gears or setting the gear box to a specific speed or both.  It's one of the more difficult things to do on a lathe. 

OP if you measure the diameter of the screw,  I can try to look up the size based on a chart someone posted here. It's got singer thread sizes by diameter.  A thread gauge is pretty cheap too.  You could measure the pitch directly. 

https://www.amazon.com/ChgImposs-Imperial-Whitworth-Industrial-Measurement/dp/B07J9V9JTK

 

 

 

Edited December 15, 2022 by Quade