Silver Brazing broken cast iron,... cause stuff happens!
 

So when I (don't do this) tapped off the hand wheel to the newly acquired HC Singer 28, I also broke the collar it goes onto. I cleaned it with brake cleaner, after going around the breaks with a mini-grinder (Dremel for example), to create a bit of a chamfer. Then I put a spring loaded clamp bolt through them to hold them in alignment while still allowing for heat expansion, and entry of the brazing rod into the joint. Cleaned it up afterwards, by removing the excess brazing material and polished it. Looks like it should work. I'll reinstall it tonight. Remember on these the pin is tapered, and will only go in all the way if the parts are correctly oriented.
[ATTACH=CONFIG]485890[/ATTACH]
[ATTACH=CONFIG]485891[/ATTACH]The preceding picture doesn't show the cleaning, wire wheeling or chamfering or wave washer used under the wing nut, to lightly close the joint.[ATTACH=CONFIG]485895[/ATTACH]The finished repair. Yeay!

Yayyyyyyyyyyyyy! Now I wish you was closer. I'd bring my two broken treadle parts to you and get 'em fixed.

Joe

Nice repair. I can't see the joint at all.
Rodney

I understand that this piece in use has no real side load or stresses, but I would REALLY like to know how solid that repair is!

I'd be REALLY tempted to do some kind of "stress test" (but maybe on a similar but less needed part....)

Great job, you give me hope for some of the repairs I have in my list!

should you not be happy with that. I do have some, but seldom ever go to eugene, I have found that many other brands ( whites, 15 clones kenmores dress markers so on ) of machines the hand wheel adapter is the same, some use a set screw.

also in cottage grove is a shop that only deals with vintage machines, The guy has alot of parted out machines his prices are very good. It's well worth the drive down there if just to shoot the BS with him. He has a singer 7 on disply. can't remember the name, I can look that up, he's on river road right next to the golf course parking lot..

steve...in pull tests done on the job, maintaining less than .010" gap, the braze will hold, the .090" wall brass tube will seperate away from the joint. the pull was over 2000lbs/sq inch. way over.

xxx..x i sort of know about the CG fella, but he never seemd to be open when I'm there. thsnks for the offer, I'm optimistic on the repsir.

yes he seems to be hit and miss, I was there last week, Didn't look like he was there ... plus his parts machines are at his home.. I needed a round needle plate for a 28. he brough some in. about 3 months later I stopped. he price was $1 each LOL...

again it's worth going just to see a real live singer #7 That thing would sew car fenders.

with the care you've taken on your adapter I'm sure it will work just fine... I did teh same on a take up lever 20 yrs ago, it hasn't fail yet. The machine is a singer 16-188 thats a 1916 / 18 ? walking foot, Brazing is alot stronger than people think..

I don't understand most of what you said but I hope it was successful!

Helps to know what you are doing and how to do it...Leaves most of us in the dust.

lwell basically I'm showing a way to repair broken iron parts by using a torch, flux and brazing rod, in this case silver. If you have simething like a treadle base broken, it would be a way to fix it.You need to have the 2 pieces, clean and free of oil or grease. a way to position them, oxy/acetylene torch, or 1 of various other fuel gases. The important thing is, this could be done locally without being very expensive. Sorry to be so far off topic, but i know people wind up with broken bobbin winders, etc, thought it might help to see repairs.