Constabulary

that's most likely why the former owner has used a longer needle You can either try to lower the presser foot or use a longer needle to prevent this.

I don´t know your tension spring but maybe a heavier type beehive spring could help too. Juki parts is # B3114-232-000. You should get them from most industrial sewing machine dealers. They usually cost 2 bucks or so. Maybe worth trying. Or try a larger needle size . Stitches on most needle feed / triple feed machines become shorter the thicker the material. That's the pendulum effect of the needle bar. Add another layer and stitches will be even shorter.

Needle hook timing should be the same as for the Singer 16 Class machines cause it has a CB hook and is using sys. 16 needles as well. Try this:

Who said that - the Chinese seller? Thats quite unlikely but could be possible if they ship to a EU based distribution warehouse run by the Chinese (or whom ever) and they do the import custom work and pay the duties (which is prepaid in one or another way by the seller) and from there they ship to your address but I honestly would not expect that! In worst case If you (as an importer) do not have a receipt showing that you or someone else paid the import duties + VAT for this shipment then it could be Zollhinterziehung / Steuerbetrug (not kidding). And saying "but the sellers said so" does not prevent you. Make sure you have your self informed in terms of "Wertgrenzen". AFAIK you have to make an electronic import declaration for goods above 1000€. So be careful!

Again - it was just a brain fart. The idea was that the above linked soft start module possibly could add some sort of acceleration ramp to a servo motor without speed reducer. I´m not meaning the lowest rpm a servo starts with I mean a slightly smoother start / rpm acceleration when you hit the pedal. I personally don´t have the need cause I´m using speed reducers. It was just an idea because I´m in process of adding this module to my table saw and thought it possibly could add some comfort to one or another servo motor. Again - just a wild idea and I though someone else here probably had a similar brain fart or maybe has some experience with this module in general - you never know. EDIT: My idea was just a softer start of certain (not all) servo motors and not preventing from tripping fuses and so on... Just a softer start, no RPM reduction... So boobies can explain it better than I (different module - but same effect I was thinking to achieve) https://www.youtube.com/watch?v=oSrz3GaaDO8 This was the table saw soft start module (or similar) I was thinking of: https://www.youtube.com/watch?v=iWr0B2U-QT8 Note the difference when the motor starts.

I´m using CS Osborne brass snaps until I find a proper supplier for DOT black brass snaps on my end. DOT so far and in IMO worked best.

Depends on what parts you need. Some may work others wont. But don´t expect to find too many parts. The parts I found was just trial and error - I just bought them to find out if they work or not. I also swapped out the needle bar and foot bar so my machine now can use common needles like 135x17 and the common Singer type feet (check my above linked thread for that). I also installed a "foreign" brand hook so I can use the bobbins of my 111G156 machine. But I have a single needle machine and yours is a double needle machine - thats a different story (at least partially).

depends on what gunk you have there, I´d scrape it off and I´m usually using paint thinner for cleaning off the reaming gunk.

In case you will order it - keep in mind you have to pay import taxes and then 19% Einfuhrumsatzsteuer on top. If the machine goes with DHL standard you probably have to make a trip to your local customs office (which is maybe close to you or maybe 100km away - check that on Zoll.de or call them) to provide your payment details. If they ship with DHL Express or UPS you most likely have to pay your duties on delivery at your door. DHL Express and UPS (or other forwarding companies) may charge some fees as well for handling your package (meaning doing the customs work).

Space aside - have you considered machines like the CB-3200 with reverse, speed reducer and motor? Costs more but for sure is a lot more comfortable. Before you buy a hand crank machine I´d test both the motor driven machine and the hand cracked machines (if possible). I have tried treadle machine > I don´t like it! I have tried hand crank machines > I don´t like it! And I have tried motor driven machines with speed reducer > I like it a lot. But thats just me. So before you pull the trigger better test the machines to see which one you prefer - honestly!

I´m pretty sure Cobra and Cowboy 8810 are the same machine. If you need reverse you can have it optional. It´s the CB-8810R then - check the Toledo website at the lower right end. Never underestimate the advantage of having a dealer locally.

Electronic bells and whistles can safe money in mass production and can make things (sewing) more comfortable as long as they properly work. So it depends on your output and how comfortable you like it. But as chrisash said these bells and whistles can turn into a money pit when they go faulty after a few... years? If they last - great - if not it´ll be expensive. Since you are in Ohio - why not checking with Toledo Sewing Machines so you have a local dealer who can help you https://www.tolindsewmach.com/cb8810.html

Here is another file Singer 52w.pdf

Looks similar to Singer 52w (very early model made from Wheeler & Wilson parts) but I do not know the subclass. I have attached manual for a 52w100 which seems to be close but there may be some minor differences. The manual came from another LW member just recently. A while ago I have restored a 51w single needle machine which is very similar to yours. https://leatherworker.net/forum/topic/86292-singer-51w-sv-2-post-bed-machine-restoration/ EDIT: Just noticed you posted in the above thread already. Singer 51w100 and 52w100 - instructions for using and adjusting.pdf

Maybe you like to post some pictures of the front and back side to show the details of either machine for future reference. Picture often tell more than a thousand words.

The 29K71 is almost identical. There are just minor differences. The majority of 29K71 parts will work for the 29K58.

Don, my original idea (or brain fart) was this thingy here which goes into single phase table saws: https://www.ebay.de/itm/Vollmetall-Sanftanlauf-Anlaufwiderstand-12A-mit-Osen-Softstart-Soft-Start/143616841340 I´m not really following the idea for my sewing servo cause I have no need but it just popped up in my head so I asked. You never know.

I do not know this machine in particular but Sunstar is a known Korean Brand. It appears to be based on the Singer 212G141 or similar but with different stitch length adjuster. I´m quite confident that the Sun Star is using the the same gauge parts (for different needle distances) as the Singer 212. I own a 212G141 and when I look at the parts list & user manual (can be found online) I see many similarities. Hooks and bobbins can be found online and are for sure the same as for other Singer based double needle machines. I have converted my 212G141 to a "split needle machine" - maybe you are interested in it. https://leatherworker.net/forum/topic/80209-singer-212-112-double-needle-converting-into-split-needle/?tab=comments#comment-535703 You can us it as 1 needle machine by just removing 1 needle and the bobbin. But there are no special "single needle feet for double needle machines". You either have to modify a double needle foot for your needs or just use the double needle foot as is. But the 2nd hooks is always spinning you cannot turn it off. I would not worry buying the machine if it technically suits your needs. When you go and look at it check if forward and reverse stitch length are matching, check the condition of the timing belt and if the foot lift suits your needs. I don´t know Refrey machine but by just looking at it it appears to be some kind of clone of Pfaff or Juki machines.

Was just a wild idea... if you don´t ask you will not know the answer Maybe a brain fart.

I think I have one... Let me check. A while ago I have restored a Dürkopp Class 18 patcher machine but I no longer own it. EDIT: Just notices the doc files - the link goes to my machine

I know - I have speed reducers on all my machines. I want to add a soft start to my table saw so this just popped up in my head... just an idea... don´t know if it is possible at all.

Just a tinkering idea.... I´m not an electrician so I wonder if it possible to add a soft start module (as on table saws) to our sewing machine servos. Will it improve the comfort and does it make sense at all?

The Class 17 has a fairly small pulley on the hand wheel. So when installing a servo you should install a 40-50mm pulley (the smaller the better) on the motor shaft and I would even consider a speed reducer. Most servos start at 200rpm and when you have a 50mm pulley on the servo and lets say a 70mm pulley (I guess) on the hand wheel your machine still runs at approx 140rpm at slowest speed. Ant it would be even more the larger the motor pulley is. Thats why I would consider a speed reducer (DIY or bought off the shelf). If it was my machine I would install the speed reducer where the clutch system is mounted and the servo where the current motor is mounted. I would even keep the original table plate cause it looks quite nice. I would clean it or grind off the surface and either oil it or apply a clear varnish. My 2 cents

On my end they often sell between 800€ and 1200€ w. motor and table in good used condition so when $460 is USD then its approx 385€ - thats less than half the lower end price! You can be sure - that offer would not last a day on Ebay or classifieds.

ha ha - bargain - buy it!