Northmount

Max thread size will be the same on all these. 138. Needle system 135x17 conical point or 135x16 leather point. Max thickness 3/8". If you read closely the parts are interchangeable between these clones and Singer. Adjustments similar on each. If you are intending to sew leather you want a servo motor and a speed reducing pulley set so you can go slow enough. I have a Techsew 2700, basically the same machine, just a little newer clone. Works well, they are good machines. Tom

These links refer you to the same machine under different names. So you can look up specifications and comments under Consew 227R, Seiko CW-8B, etc. it's amazing what information you can find when searching here. https://leatherworker.net/forum/topic/87827-brother-ls3-c51-050/ https://leatherworker.net/forum/topic/46555-brother-ls3-c53b-walking-foot-cylinder/ Tom

Use sand paper. Tom

@Oneeyedfriesian Moved your post to Saddle Identification Tom

Guests can't PM. Provide a contact email or answer/ask questions here. Tom

@Bellandra8 Moved your post to the Marketplace Tom

135x17 are conical point for fabrics. 135x16 is a chisel type point used for leather. It will cut threads in fabrics in instead of sliding through between threads. Other than that, they have the same specification for length, diameter, etc. There are several different types of leather points, diamond, etc. Needles and stitch type.pdf for needle size versus thread size see this chart. Tom

You can't. But I could move it to the marketplace for sale if you haven't already started a new post there. Tom

Their ISP is Cloudflare.com located in the USA. Tom

I found some about a year ago, name included Lemon scent or something like that. Don't remember what store it was in. Tom

Depends on how often you use it, and what you use it on. You can harden it if you want. Black pipe is carbon steel. Remember, the harder you make it, the harder it is to resharpen when needed. A machinist built a post for me that was part of a mechanical accounting machine many years ago, and case hardened it with potassium cyanide. He had made it a little too thick where the slide was supposed to fit over it. Tried to stone it down, but couldn't even touch it. Took it back to the machinist, and he said how am I supposed to do anything with that now? I asked about heating it back up to soften it? He said, yes that would do it. So he fixed it and case hardened it again. Was interesting to see the chemical reaction as he dropped the red hot post into a little pile of potassium cyanide. Really sputters! Don't try this inside or you'll poison yourself. Deadly stuff. Tom

I would look for pipe that has the inside diameter that you want. If you use the pipe you suggested, you will have to remove material from the inside when sharpening, thus any punching you do with it will wedge the leather cutout inside the pipe making it hard to remove and binding up the next hole you punch. Looking at a pipe table I see that 1.5" schedule 30 has an ID of 1.65". Sch 40 has and ID of 1.61". Both are close to the desired size of 1.625" (1-5/8"). Sch 40 is a commonly available pipe, also listed as STD wall. Tom

@Hitopstamper Moved your post to General Saddlery Discussion. Tom

Check out panavise parts and adapters. Tom

@Mark842 Please see the above post. Tom

Cute photo, good idea for a story. Tom

Needle sizes and thread size chart. For hard or thick leather, go up one size larger needle. https://www.tolindsewmach.com/thread-chart.html Tom

@MtlBiker Moved your post to leather sewing machines. Tom

The OP hasn't checked in since October 8, so I suspect has no real intent to answer any questions or to sell the machine. @janosm If you are really interested in selling your machine, you need to answer these questions and to update your post as you said you would do several days ago. Tom

Nice work Stewart! Tom

Hey @ABC3! Did you get it all sorted out? Let us know please. Tom

Have you looked at Grainger CLARKSON-OSBORN https://www.grainger.ca/en/product/1-5-8IN-ARCH-PUNCH/p/CSBMS10110 Tom

I had some awful smelling veg tan leather from Tandy once. Cleaned it both sides with liquid saddle soap, really saturated it. Then went over it with Oxalic acid 1 teaspoon crystals to a pint of water. Laid it out flat to dry. Turned out to be a good piece of leather after all! Tom

You probably have thread wrapped around the bobbin basket and shaft. Tom

Moved your post to Leather Sewing Machines. Tom