LindanHotAir

Get some pallets and a pallet Jack. Also bring several ratchet straps. You may want to bolt them to a pallet. You will want to use a 2 axle trailer with a high roof and E track tie downs or heavy duty rings.

If you have a problem with the tension releasing when sewing thick materials, you can operate without the pin. When you need slack you can grab the thread between the tension and the take up lever and pull the needed slack.

There is a video of a vibrating binder posted by Robert Collier to the FB Vintage Industrial Sewing Machine group. It is driven by a pin that drops into a hole in the feed dogs.

There are a lot of good triple feed machines on the used market. The Sailrite is less refined than the Singer 111 or 211, Consew, Juki, Mitsubishi, Seiko, and Brother machines. A 211W155 or 156 or the Japanese clones are all good options. The 155 is triple feed and the 156 is triple feed with reverse. I have a 112W117 triple feed 2 needle (no reverse) that is about 100 years old. You should be able to find most of these machines in operating condition for $500 to $1000.

I have a 112W117 from the 1920s. The stitch length adjustment is a screw on the eccentric that adjusts the throw. It is located under the top cover plate. Turn the screw and sew a test stitch line until the length is to your liking. There is no stitch length readout. There is a service manual posted in the files in the Vintage Industrial Sewing Machines group on Facebook.

Threading around the pin in the tension wears a groove in the pin that will shred thread. Route the thread over the top of the tension, then under the check spring assembly, and over the tab that sticks through the hole at the bottom left of the front plate. Also make sure the check spring is adjusted so the thread never goes slack between the take up lever and the check spring.

The Consew is a clone of the Singer 111. The thread you show is a TEX 70 also known as size 69 or 3 ply. I normally run a size 18 or 110 metric (1.1mm) for that size or up to 92 thread. I have not run 138 in my 112 as it doesn’t seem to have enough clearance in the hook. Bobbins are size G.. The needle system most of these machines were set up for is a 135x17. Some were set up for other needle systems by adjusting the needle bar position. Groz-Beckert.com has some excellent references on needles. I use their titanium nitride coated needles as they are extremely durable and lower friction. They are branded GEBEDUR.