Wizcrafts

If you can sew your projects on a flat bed machine, a beefed up walking foot machine should handle either 3/8 of medium, or 7/16 inches of soft temper leather. The Juki 1508NH has a huge bobbin and high lifting feet. It is equipped with the Pfaff needle system 190, which is 3/16 inch longer than the standard 135x(16/17). Material is also cut out in the back of the head to allow the feet to alternate at these heights, without hitting the opening on the back. A new Juki LU-1508NH sells for approximately $2600. Check with our dealers and see what kind of deal they might be able to offer you. For the same money you could buy a short cylinder arm Cowboy CB3500 (441 clone), with a flat table attachment. The machine could be setup to ensure that it sews with thinner thread that you want to use in your wallets, up to #346 used in thick holsters and such. The bobbins are huge and this machine can do it all, from about 6 ounces, up to 7/8 inches. I have the longer arm version and it handles everything from #92 up to #346 thread that I have on hand. I use it to hem leather and denim cuffs, sew chaps, sew belts, assemble holsters and ammo pouches, saddlebags and motorcycle seats. I even use mine to sew in new zippers onto jackets, chaps, etc.

Hmmm. So many requests for features and such a wide range of leather to be sewn. This may call for something out of the usual and ordinary. Let's see what you are asking for: Leather capable sewing machine that leaves no marks Thicknesses ranging from wallets (1/8"?), up to 1/2 inch Thread cutter Bobbin changes with needle down Forward and reverse straight stitch Easy to control motor with wide range at bottom end Your first request calls for a machine that has no teeth on the top of bottom. This can be done with most compound feed machines. However, all but the 441 clones have teeth on the feed dogs. This means you might have to fill in the gaps between teeth in the feed dog with rubber, dipping compound, or brazed in bronze, etc. The second requirement leaves out 99.5% of all currently produced industrial sewing machines. Most walking foor machines max out at 3/8 inches under the presser feet. The remaining 1/2% is filled by the Juki LU-1508NH (or clones), which sew about 7/16 inch, the Juki TSC 441 (or clones; e.g: Cowboy, Cobra, Techsew 441 types), which sew 3/4+ inches, and the Cowboy CB2500 and GA5-1R machines, which sew 7/16 inches. Also, some Adler and Pfaff machines and some specialized Chinese and Japanese machines (Cowboy, Cobra, Techsew, Highlead, etc) have over 1/2 inch capabilities. Machines set up for sewing 1/2 inch or more tend to not have thin needles for thin threads available. This limits you to sewing with #138 or larger on many high lift machines. Others accept small needles, but often require adjustments or parts replacements to effectively sew with thinner thread. A dealer may be able to adapt a thread cutter to the presser lift lever for you. Contact our dealers and ask them about this. It will not be trivial and will cost $$$. The next item, bobbins that can be replaced with the needle down in the material, only applies to vertical axis shuttle machines. Horizontal axis shuttles, like those used in the 441 machines and all Singer 15 and 31 class machines, oscillate along a horizontal shaft axis. You will probably have to remove the needle from the work to change bobbins. I haven't tried doing a bobbin reload with the needle down at all. There will be top thread wrapped around the shuttle and bobbin case until the needle is fully raised. Opening the bobbin case may jam that thread. I'll try it tomorrow and let you know if is doable. Most leather stitchers have a single lever that goes forward or reverse, depending on the position. Others use a stitch length dial and a separate reverse lever that you hit with your right palm. My motors sew very slowly, until I press down on the floor pedals. Not every motor is so easy to control. Some have to be modified with light baffles to get any usable low speed control at all.

A walking foot machine, with triple feed. It cound be a flat bed model, but a cylinder arm allows you to sew circular portions over the end of the arm, in a natural curve. I use my Cowboy CB4500 to sew seats. I change the thread to #138, top and bottom and use a #22 or #23 needle.

That is the model my buddy had and sold for a couple hundred bucks. The feet had aggressive teeth on the bottom. It was a double feed machine, with the outside foot driven in sync with the feed dog on the bottom. The inside foot and needle bar just move vertically, in one position. These are upholstery grade machines and are also great for feeding denim and vinyl, or chap leather.

The Singer patchers are a perfect machine for sewing patches onto Biker's vests and jackets, especially onto sleeves. They are also good for repairing shoe uppers that have come unsewn with use. You can do all kinds of repairs and even install new zippers on a patcher. You are pretty much limited to using #69 or #92 bonded thread. The bobbins are tiny. The feed is top only, via teeth under the presser foot. The maximum thickness it can sew is about 1/4 inch of soft to medium temper leather.

I forgot that this topic was about your Pfaff machine, not the 31-15. Is your Pfaff supposed to use system 134, or 134-35 needles? There is a difference in length and geometry. I can use some 134 LR needles (from my previous Pfaff industrial machine) in the Singer 31-15. However, it cannot use 134-35 unless I raise the needle bar. Check your manual and make sure you use the correct Pfaff needle system. This might mean retiming the hook, or moving the needle bar. I have experienced movement of my 31-15's needle bar. I used that fact to change the set screw to a new one that I could really tighten down. The original was 96 years old and worn. As for modding your shuttle for #207 thread; opening up the clearances will allow #207 to pass around the bobbin case and the top tab on the case, then past the tapered end of the shuttle driver. But, the extra slack may mean that thinner thread skips at various speeds, but especially when sewing single stitches (stop/start), or hand-wheeling. The timing of the hook and spacing from the side of the needle (for #207) may render it ineffective for say #69 thread. If you do anything to the shuttle driver, like bending it, or any other parts on the shuttle assembly, have a spare on hand just in case.

Perhaps these folks have newer models of the 31-15 than mine. It was built in 1916, according to the serial number. It won't even sew with #138, much less 207 thread. When I tried to open up the clearance between the shuttle and shuttle driver, it began skipping stitches. The timing became erratic at best and the machine was not trustworthy under that configuration. Your mileage may vary. Another thing that is weird about the 31-15 machines has to do with variations in the angle of the bobbin case mounting tabs and the opening in the tab plate. I had to bend one tab in and the other out to keep the bobbin cases from spinning around. Again, your mileage may vary. The needle bar in my 31-15 does not accept #23 needles. It uses a thin stem needle meant for tailoring machines (e.g. 96k40), which line up dead center in the little hole in the throat plate. Anything else would hit the throat plate with the slightest deflection. I cannot use other needle systems without a lot of difficulty (been there, tried that). The biggest needle my machine uses without trouble is a #21. Finally, these 31-15s use a standard (small) bobbin. If you load it with #207 thread it may sew two belts. Aside from the difficulties, I like my 31-15 for tailoring, hemming clothing and lightweight leather items. I even use it to sew patches onto vests, right through the lining. I have converted my 31-15 into a roller foot machine, for better feeding of garment leather.

A buddy of mine had a Rex 280 something that had teeth on the presser feet and feed dog. It marked up the leather pretty badly, but fed like a SOAB.

Bonded nylon.

#207 thread in a Singer 31-15? I am barely able to get #92 thread around the bobbin case and shuttle (it snaps noticeably as it passes the top of the bobbin case). The slack in the shuttle driver would have to be tremendous to pass #207 thread. This would make for unreliable timing as the position of the hook varied with rotational speed and top thread tension changes.

Trox; I run all of my top thread through a lube pot containing liquid silicon. It helps maintain top thread tension, lubricates the inside of the holes and cools the needle. The silicon is clear and does not appear to discolor natural veg-tan leather at all. Ditto for the clear oil I use to lubricate the machine.

"system DPX17" indicates the overall geometry of the needle, not the diameter of the business end. There is no #17 needle. Many "systems" have 17 in their designation, such as: 135x17. Needle "sizes" relate to the diameter of the shaft. A #18 needle in any system has the same basic diameter where it passes through the material. There may be variations in the scarf cutout, or the size or shape of the eye, but the basic diameter will be the same for most that claim to be a #18. The basic rule for needle sizes is to use the needle that allows the thread to flow smoothly, through the eye, without binding. If you hold a threaded needle with the ends of the thread between your hands, then tilt one end up, the needle should move freely, but not sloppily. If you are going to sew a 1/2 inch saddle pad, I would use at least a #22 needle with #138 thread. I would also test the machine in advance to see if the bottom of the needle bar hits the top of the presser foot, at this height. Most standard industrial machines with typical needle systems, cannot sew that much thickness. You are probably going to have to move up to a CB2500 type machine to do this work. It handles thick thread and almost 1/2 inch of leather, webbing, etc.

I have never seen a #17 needle. I have seen #16 and #18. If you have #16 needles, the maximum thread size in bonded nylon or bonded polyester is #69 (T70) thread, sewn into thin leather, or denim. If you have #18 needles, they are good for thicker denim, vinyl or 1/8" thick leather, using #69 thread. If your machine can tension heavier thread, like #92 (T90), a #20 needle is just right (in my experience).

I am trying to find a set of three round, checkered bevelers by Craftool USA. The tool numbers are: B262, B263 and B264. I already have the set of smooth round bevelers. I am hoping someone has a spare heavy duty Neva Clog stapler and a few boxes of heavy staples to spare. I won the light duty model that uses type A1000 staples and they are somewhat weak and short, for securing belt keepers. The heavy Neva staples are about 1/16 inch thick and I think 5/16 inch long. The light duty A1000s are about 1/64" thick, like regular clipper staples.

The Singer 241-13 is not meant for sewing leather at all. It is a very high speed garment machine, targeted at garment factories. It has an oil pump that requires a high rpm to distribute the oil to all moving parts. That said, you can only hope to use #92 thread in that machine. It can be slowed down by changing to a servo motor. Toledo Industrial Sewing Machines (866-362-7397) sells the Toledo Sew Slow, which is a rebranded SewPro 500 GR. I have two of these motors and love them for the wide range of pedal control.

I use my walking foot Cowboy CB4500 for all of the holsters and gun belts I and my partner make in our shop. Most of them end up being between 1/4 and 1/2 inch thick and are sewn with #277 thread. You cannot use this size thread in anything less than a full blown heavy duty leather harness stitcher. Some people sew holsters with #207 thread. This can be used in beefed up upholstery grade walking foot machines, which are a couple steps down from my Cowboy. Or, one can use a bottom feed only CB2500/GA1-5 type machine, capable of sewing 7/16 inch with #277 thread.

He's telling you that factory branded parts for the Pfaff are astronomically priced. If the machine needs Pfaff parts. Most Pfaff machines use proprietary parts which you will be locked into buying, should any need replacing. You should ask the sellers to demonstrate their machines with bonded nylon thread, which you may have to bring with you, sewing into leather you bring along. However, some or all of them may already have bonded nylon thread on hand, and needles to match it.

Yes, a #24 needle is a good match for #207 bonded thread, especially black, springy thread. You might be able to use a #23 Schmetz or Pfaff needle, as long as it is a leather point needle.

I have converted my National walking foot machine to use system 190 needles. I have leather point (190 LR) needles in sizes 16 through 25. I even got a pack of #150 needles from Bob Kovar, which are perfect for #138 thread, top and bottom. Bob Kovar stocks most system 190 needles. They are made for certain Pfaff models. Using an undersize needle increases the thread tension requirements. One you install a #24 leather point needle the knots will rise on their own and you may be able to back off the top tension.

You should be using leather point needles. Increase the inside (if exists) and outside foot spring pressures until the lifting of leather is curtailed.

Jim, thanks for that explanation about altering stainless feet. I did a little sanding on my right toe foot and have ground down and polished a couple of my throat plates. It's good to know that this doesn't change the stainless properties. I intend to have some custom feet made to sew particular jobs and they will be cut from stainless steel also. I like the looks of chrome, but hate it when it starts to chip off. I was using the roller edge guide on my friend's Class 4 and the guide hit the right toe on an upstroke and chrome began flaking off of the roller. A stainless roller wouldn't have been damaged, or, could have just been buffed smooth.

I own a Cowboy CB4500 and am totally pleased with it. It sews just about anything I throw at it. I got mine with the full accessory pack and am glad I did. I was previously sewing for a friend, on his Cobra Class 4 and it is also a fine machine. These 441 clone machines are quite similar. The differences are in how the dealers set them up and adjust them and what you get with the machine. The Cowboy machines come with stainless steel feet and throat plates, allowing you to sew wet leather without discoloring it.

Back off your bobbin tension until it has a light but smooth pull. Back off the top disk tensions to get the knots right. Try using a #24 leather point needle.

I don't know. Why don't you call Bob Kovar and ask him? 866-362-7397.

Why don't you order your needles from Toledo Industrial Sewing Machines? They have virtually every available system in stock. If not, they can usually get them.