Singer 7-33 parts missing

[Silky]

22 hours ago, shoepatcher said:

The Consew and the Seiko machines in this class came from the 7 class singer.  Chances are a lot of those parts are the same.  Will not be cheap!!!

glenn

Ha ..... I did make an inquiry earlier with a major supplier for ALL of the lift and feed related parts.

No response yet  .... as I assume they have not stopped laughing yet. Just as well though as I'm really not expecting one.    No problem ...... thanks again.

A related question: Considering this 7-33 for canvas, webbing, heavy fabric and maybe leather. If you were to choose 1 stitch length (if possible) to cover all bases, what would your choice be ?

I might incorporate a feed mechanism of my own design but it will be of a single fixed stitch length. Possibly modified later to reverse and vary the length but fixed to one length to start with.

Thanks

[shoepatcher]

This machine could sew up to a 12 mm stitch.  I think I would want about a 8mm stitch length to cover all the bases.

glenn

[DonInReno]

There are at least a couple guys around the country that hoard 7 class singers and have most parts available, but they aren’t cheap.  Seams like one guy is in the Seattle area, but I don’t have any contact information.  If I was in your boat I’d keep an eye out for a basket case machine that had the parts you need - I’m guessing something in the $400 range would be a good deal.

[Silky]

Hi Don,

 I've been checking frequently within my reasonable radius for remnants but am beginning to think this is futile.

The few prices I've seen for some of the parts is beyond practical for what I would end up with. I'd be better of to buy a new machine ... or a good used one. I do still have a plan for my own feed system. Materials are free, design and build time are just for fun so that wont hurt too much. And then the machine will at least work for me.

One issue I have not totally worked out yet is reversing. I can reverse the dog movement but with the vibrating presser following the dog, then returning by spring pressure to the leather bumper cushion, I'd need the foot to travel forward also. Maybe a spring on each side of the bar (front and back) .... both springs holding the bar in the center position when lifted. Then the bar and foot could swing either way. The other thought was a fixed bar (moving up and down only) with a wheel instead of the foot. Sound feasible ?

This might be a project for the coming winter.

Thanks again,

[Gregg From Keystone Sewing]

Silky, we add reverse by cutting and welding some parts and adding a lever seen here in this image.  We then drop a chain down through the hole and connecting to a foot pedal for reverse.

[Silky]

Hi Gregg. I'm guessing you cut the normal knob end off of this piece, then weld an extension to the rear of the head allowing the fork to oscillate beyond center in the reverse direction and the 2 adjustable stop screws set the stitch length in both directions. What did you do with the presser bar to allow it to swing forward while in reverse ?

I wish I had the parts, this would be quite simple and easy for me to do. But, keep in mind, I do not have ANY of the parts for the feeding. This machine builder either stripped everything out or possibly bought the 7-33 already stripped from Singer. (maybe at a reduced price) The bosses underneath where the pivot bolts go still have paint in the threads like they were never used.

I don't even have the cam on the top shaft ... or the fork, or the 2 shafts underneath. And no lift bar for the dog.

Thanks !

[DonInReno]

On 10/28/2019 at 4:53 AM, Silky said:

. I do still have a plan for my own feed system. Materials are free, design and build time are just for fun so that wont hurt too much. And then the machine will at least work for me.

More complicated mechanisms have been built by hand in the days before mass production so I have no doubt that it’s possible to make the parts.  Personally I’d feel more comfortable getting my hands on a complete machine and measuring/drawing up the parts to be copied.   What a fun project!

[Silky]

8 hours ago, DonInReno said:

  Personally I’d feel more comfortable getting my hands on a complete machine and measuring/drawing up the parts to be copied.

That would be fantastic, but not likely to happen. Although I am watching for one. My tentative plan is a bit simpler but has a fixed stitch length and (for now) will not reverse.

Thanks

[Gregg From Keystone Sewing]

18 hours ago, Silky said:

Hi Gregg. I'm guessing you cut the normal knob end off of this piece, then weld an extension to the rear of the head allowing the fork to oscillate beyond center in the reverse direction and the 2 adjustable stop screws set the stitch length in both directions. What did you do with the presser bar to allow it to swing forward while in reverse ?

Yes sir, that's exactly correct.