Northmount

I checked your file sizes and don't see any problem, even with the first ones you uploaded. Maybe something on your end with your browser or your ISP? Sorry I can't test as there is no limit on the size of moderators' uploads. If you have more to post and can't get through, message me and I'll give you an address to email them to, and I will post them for you with your comments.

@Pharvey Moved your post to Leather Sewing Machines.

Interesting that your profile says you are from Chicago, but your IP address is from Ahmedabad, Gujarat, 380001, India. Are you a serious leather worker, or are you trolling?

@Zack00 Moved to 3D Printers and Lasers.

Just to clarify, the twin needles on top with a spool for each, both threads passed through the tension disks, single bobbin thread on the bottom. The top shows double row of stitches, the bottom thread shows as a single zigzag stitch since it has to hit both top threads.

The manual says 135x9 needle system. That's not particularly an industrial needle! Standard domestic system, even though it is in an industrial tailoring machine. So the standard dressmaking twin needles fit.

That's all my wife uses is the regular needle clamp on her cheap domestic. The 20U series is beefier than her little machine. The needle clamp on my 20U is certainly stronger her domestic and stronger than the double needles. The double needles will fail long before the clamp.

@Atilla1 moved to leather sewing machines

@Tilda moved to leather machinery

@CitroenLVR Moved your post to Leather Sewing Machines

@Techsew Ron Your support is needed.

LOL

@IronCross Moved your post to Leather Sewing Machines.

Please post a photo or two and give a few specs for what it is capable of. Thanks.

Yes, the discontinuities in the crystal structure pretty much says bad casting and mill work.

When you look closely at the fracture you see what appears to be crystals. From my limited knowledge of metallurgy, this is brittle fracture. Here is some authoritative information if you want to study it a bit more. https://www.corrosionpedia.com/definition/280/cleavage-fracture Quoted from above article: Cleavage fracture surfaces appear in steels due to: Sudden or impact loading Low temperature High levels of constraint Ambient temperature Heavily cold-worked parts I think the last item in the list is probably the root cause. If it was the first item in the list, I would expect to see a lot more damage, likely in the drive train. That is my guess, and am willing to stand corrected if there is a knowledgeable metallurgist here in the forum.

@Carverdw Moved your post to Leather Sewing Machines

@Silerleatherworks Moved your post to Leather Sewing Machines.

Consider Chicago Screws. Available in several lengths.

Missed that. sbrown's IP Location Seattle, Washington, 98101, United States

Read posts above and profile, somewhere in Michigan. You could also add your location to your profile so you get comments that may be more related to your location.

@DonLawson84 Moved your post to Leather Sewing Machines. Please post your photos here rather than 3rd party hosting. Photos on 3rd party hosts seem to disappear now and then due to problems with the host changing the rules, and because the person who posted the photos moved or deleted them. Lost photos destroy the integrity f the post making the thread useless to others in the future.

@Johanna something strange going on here. The edit button doesn't appear for some, but does work for most.

So to those individuals that respond to posts, you should quote a part of the post you are wanting to communicate with the person that made the post, or use the @ symbol followed by the person's screen name so a notification gets sent to them. Example @Silverd Good luck with all your projects.

Do you mean sewing machine? You need info off the machine's tags rather than the motor. Motors are too generic to provide info about the machines they are attached to.