My initial thought was yes, but I've never had a 31-20, so I did some checking... Cutex's website shows a SKU for the 31-15 as Sku: 62740, yet shows the 31-20 as a large capacity Sku: 20756. Just goes to show, ya learn something new every day...

Bill didn't put up a link, but I will. He's really talented and y'all should check him out! www.youtube.com/@wfjenterprises--billjohnso8701

@@BobFowlerWorkshop thank you!

Bll has great Videos for featherweights. I learned a lot from him Great Guy!!

@@KarenC-rv2zp thank you!

OMG Thanks Heather!!!!! I checked out your stuff and it is AWESOME! I wholeheartedly recommend that everybody check it out, it is certainly NOT the usual channel. Bravo!

I still need to get to your side of the country and take you up on your offer a day of vintage sewing machines and dinner... LOL

I wish I had room in the house for dogs, I would love to have a German Shorthaired Pointer again. Oh, and add an English Springer Spaniel to that as well...

@@BobFowlerWorkshop like sewing machines, the list can get pretty long! Thanks, Bob, for your great videos❤️

Speaking of pie... A special shout out to Lorne and Susan at Hot Graham Sauce Company. Their "Warmup" hot sauce is absolutely delicious on apple pie. Yes, hot sauce on apple pie sounds strange, but it is soooooo good! hotgrahamsauceco.com/

It's not hiding, it's going back to the basics of polite society of not inserting political commentary where it isn't appropriate. Honestly, the ONLY way to change my mind of this is to convince me that politics have ANYTHING to do with the subject here, which is vintage sewing machines.

@@BobFowlerWorkshop Nope, I wouldn't try to change your mind, nor do I blame you. If I had a yt channel, I might do the same thing. But only because we have so many people in the world who can't get past opposing viewpoints.

I have a lot of friends who have complained about "comment section burnout", and even one (not a sewing machine related channel) who just turns comments off, period!

Email me pix of what you have to [email protected] and I'll take a look...

It's not as much about being resourceful, rather I don't want to have to worry about lack of spares or delivery times. Besides, I like specialty pliers and this gives me an excuse to own a lot of them! 🙂

Short answer: you can't, it's fixed at the factory. Long answer: on these machines, unless the shuttle driver has been replaced, the linkages that drive the shuttle were pinned in place when the machine was built. On these we don't adjust timing, we adjust the needle bar height to get the machine into proper time. To do this, it's necessary to remove the needle plate so you can get a good view of the hook portion of the shuttle. Often, it's helpful to also remove the feed dog for a clearer view. Install a NEW 14 size needle for this measurement and adjustment. The screw that you need to loosen is on the pillar side of the needlebar box. There's a hole, that when the needle bar is down, allows access to the screw on the back of the needle bar clamp. On the needle bar itself, you will see two lines engraved at the upper portion of the bar, where the needle bar enters the upper bushing. With the needlebar at the very bottom of its stroke, the upper line should be even with the bottom of the busking. Loosen the screw that secures the needlebar clamp to the needlebar though the previously mentioned hole, and raise of lower the needlebar to align that mark. With the screw tightened snugly, turn the balance wheel in the direction of normal operation (top of the wheel towards the operator) until the lower mark on the needlebar is even with the bottom of the bushing. At that point in the rotation, if all else is OK, the point of the hook will be even with the shaft of the needle, and the point of the hook will be approximately 1/16" above the top of the eye of the needle. If the needle is aligned with the point of the hook, but the distance is too great or too little, loosen the needlebar clamp and move the needlebar to the appropriate spot. At this point, the marks are not important, it's the alignment of needle to point of hook, and distance from point to top of eye of needle that's important. I know this is a long explanation, but you asked! There is a copy of the adjuster's manual in the manuals section of my website here: bobsvsmservice.com/wp-content/uploads/2022/07/Singer-15-91-service-manual.pdf

I'll measure, but I suspect it's smaller. I also have .064 wire that should work for the upper.

@@BobFowlerWorkshop That would be great. Those little buggers are my nemesis.

Ask and it shall be given... kzfaq.info/get/bejne/btGHntGGtNDUhqc.html

Nice to have that link and the tool ideas! I did this repair not too long ago, but the remaining piece refused to be pushed in any farther. Drilling for 2 hours with a special bit got me 3/16" hole. I used JB Weld and built it up around it a tad. That was good enough, the thread guide is holding. I ran completely out of profanities doing this job.