Need help with Singer 7-33

[Cferna27]

Hi all,

 

...well I just purchased a Singer 7-33.  been looking for this for a long time. Upon receiving the machine,  low and behold  the machine is damaged.  BAD!

In short, can any one please help me find a Fly wheel? 

[Northmount]

@Cferna27 Moved your post to Leather Sewing Machines.  You'll get more action here.

Tom

[dikman]

Unless you're anal about the looks, why not just replace it with a suitable large pulley?

Anything else damaged?

[Cferna27]

Hi, ...was thinking about the same exact thing.

Thanks.

[Gregg From Keystone Sewing]

35007 Consew Seiko balance wheel will work as a direct replacement here, all the same as the older cast iron spoked handwheel.

[dikman]

Just had another thought, if the pulley part itself is intact just trim off any bits left by the broken off rim, patch the damaged edges with an epoxy and smooth down. Cheap way of getting it working while you decide what to do.

[Cferna27]

Thank you so much for both your advice.

A friend volunteered to see if he can weld back the pieces together?  So lets hope that works out?

 

C.

[LederMaschinist]

Technically cast iron can be welded, but it requires the correct filler rod, and very careful preheating.  If your friend is experienced in welding cast iron, they might do it successfully.  If done improperly often the cast iron will spontaneously break next to the weld repair at exactly the most inconvenient moment.

If they aren't experienced in welding cast iron, it's much easier to brass or bronze braze the repair.  Suggest this to them if they can do it.

 

The other possibility, and certainly the easier solution is to measure the diameter of the top shaft where the wheel mounts, and replace it with an off the shelf sheave (pulley) of your choice.  Going this route, you can use an even larger wheel, which will further slow the machine and increase torque.  You'll lose the traditional Singer look, but  you will end up with a solution that can be even more functional than the part you replaced.

Edited July 16, 2019 by LederMaschinist

[dikman]

Good luck with the welding! Looking at the breaks it's going to be a very fiddly job (not like simply welding a cracked base plate together).

[chrisash]

If welded and it breaks at high revs it could send fragments all over the place and hurt you, obviously you would go slow at the start but just when you get confident its ok and speed up a bit???