kgg

That edge dye roller looks really nice. kgg

A lot is going to depend on condition and price. A couple of photo's would be helpful. The Mach 3 use to be I think the house brand clone of Leighton's Industrial Sewing Machines out of Alberta. I am not sure if they are still in business so it would be wise to check. kgg

I just looked at the 4800 and it does have a pump but you still have to manually oil certain points on the machine. I am not sure what the pump is oiling. kgg

Looks good. kgg

The Seiko CW-8 you manually lub them. I don't know of a cylinder arm machine that has a oil pump. kgg

Sometimes I may only need a few of something but for a few dollars more I can get 50 so I will buy them as I will probably use them at some point. In these weird times if you find an item whether it is hobby related or not I buy more then I need because with my luck the next time I need one there will be none available. This morning I needed some dishwasher powder as I was almost out. I went to Wally World and they had none but our independent super market only had 5 so I took 4. My POS BOSH dishwasher only likes one brand and only likes powder. kgg

If I am not mistaken the newer release of the Juki 1541S has the "Knob" vs the older 1541S. I think that is why you are seeing the older versions being reduced in price. If you need the additional feature of the "knob" for your sewing needs then it is probably a good feature. My machine doesn't have that feature as it is about four years old even through the casing has the mounting holes, etc there in the top of the machine. The Juki 1541 is made in Japan vs the Consew I think is made in China by who ?? for Consew. The resale value of any clone down the road is going to be less then that of a similar model Juki and the Juki will be easier to sell. You should test drive both machines side by side to see which one is of the better quality / price for your needs. In the pass some of the clones of the Juki 1541 didn't have the same hook as the Juki so check and see if parts that fit the Juki will also fit the clone machine you are looking at. Remember some of the clones will rate the max thread of their machine by the size of max needle it can take. Juki rates there machine by the what it will sew using the max. thread in both the top and the bobbin in thick materials which is usually one thread size smaller then the max size needle capacity. Buy Once, Cry Once kgg

I don't know if this would work but another option which may work is if you move the clevis holding the needle bar at the top of the head like people do to convert their Chinese shoe patcher's to accept 135 x 16 needle system. They go from a shorter needle to a longer needle by moving the clevis up on the needle bar up about 5mm. In your case, you would want to move it down to accept a smaller, lengthwise, needle. A reference video on youtube to do this for the Chinese patcher. kgg

Your setup now is basically the same as the $1400 Sailrite Leatherwork (www.sailrite.com/Sailrite-Leatherwork-Sewing-Machine-Package-110V ). If you need / want to get the speed even slower I would suggest a speed reducer pulley combination. A good reference for sizing pulley combinations can be found at www.blocklayer.com/pulley-belteng.aspx . kgg

I agree, doesn't pass the smell test and at 45 percent of the cost to get a new one with the tax, shipping and exchange included for a clone not a great price. A 30 percent would I think be more inline for a clone. kgg

Also there is a third option in the one armed bandits the Cub by Weaver. kgg

How would you interpret this ad for a Cobra Class 3 sewing machine I recently seen advertise on Kijiji. https://www.kijiji.ca/v-hobbies-craft/brantford/leather-sewing-machine/1609374026 Machine has a warranty, new machine, price, etc.???? Maybe someone in Ontario would be interested in this machine. I have no association or interest in this machine. kgg

What I have noticed when order stuff from Amazon is over the last year some of the sellers are really terrible for getting stuff out to you and has become a hit or miss unless you order items that they fulfill and you have a prime membership. When it sold by china joe reseller and they use someday maybe courier chances are you aren't going to get it. I recently ordered some size 12 (1/4") open pronged snap fasteners from a US seller which didn't arrive. So I emailed the US seller and they emailed me back with a tracking number and some fly by night courier. Guess what it was going to Calgary, I'm in Ontario a couple of provinces east. So I emailed them again this time they gave me a different tracking number and said the first number was a mistake so give it another week. My response was it is two weeks late, give me my money back. Should have just ordered it directly off Aliababa probably would have had it in under a week. kgg

Interesting. They look like copies of the old domestic Singers. You gotta love the lack of safety footwear or masks. kgg

Excellent video of the old iron. kgg

You need to have more top thread through the needle and hold the end of the top thread so the end of the thread does not go down inside the arm. A loop has to be dragged back and over the bobbin area to catch the bobbin thread. kgg

You have a electronic brush-less motor with a digital control panel where as a the brush type servo motors have a speed dial mounted to the motor. I would first check your manual as it my have a slow start programmed for initial startups. The solution would be to reprogram the control panel settings. If the motor has a odor like something burnt then the servo motor setup needs to be replaced. The whining or a high pitched noise properly indicates a bearing problem due to lack of proper lubrication or wear which may have been caused by to much belt tension being place on the servo motors drive pulley. The solution would be to replace the servo motor setup with a good 12 coil brush-less servo motor setup (more internal coils the better performance) or a brush type with a simple rheostat speed control dial mounted on the motor. kgg

If they are the plastic type someone with a 3D printer should be able to make one fairly easily as long as they had an original to work from. However, the design labor cost to replicate the clip will probably be a lot more expensive then just replacing the suspenders. I would contact Perry Belt company as some of their clips are guaranteed for life. kgg

Their newer ones appears to be available in 3 models: 1) light to medium model DLN-5410NDD-7 takes #9 - 18 needle with a max stitch length of 4mm with a presser foot lift of 10mm and 13mm by knee with a max speed of 5000 spm 2) Medium to heavy DLN-5410NDH-7 takes #20 - 23 needle with a max stitch length of 4.5 mm with a presser foot lift of 10mm and 13mm by knee with a max speed of 4000 spm 3) For Jeans DLN-5410NDJ-7 takes #20 - 23 needle with a max stitch length of 4.5 mm with a presser foot lift of 10mm and 13mm by knee with a max speed of 4000 spm Since these are high speed fabric machines chances are that at some point in it's life it was used machine in a commercial setting where it was used and abused. For me any machine that has electronics would be a no go unless they were basically giving it away. You know the electronics are going to fail at some point and replacement parts are going to be expensive if and a big if they are available and even salvage electronic parts are expensive. Electronics are really made for production work where speed directly relates to dollars while the hobbyist speed and those 1000 different stitches / functions really aren't necessary in the majority of cases. My question is do you really need all the functions that the electronics offer or is it a want? Also you never mentioned your budget but most importantly what is the thickest amount of material in the seams of folded material you are planning on sewing. I would suggest: 1) Look at machines with no electronics what-so-ever on the machine itself or the motor even a new machine, brand name or clone. 2) Get a clean plain jane setup, sewing machine and servo motor from a brand name company. Which Juki is. 3) Don't buy a machine just for what you are planning too sew today but later down the road where you go from say nylon backpacks to 21 oz canvas cushions. 4) A good starting point if you just want a drop feed machine would be a Juki DDL-5500 (new c/w table and servo motor ~ $950) but you are really limiting yourself when trying to stitch and feed across or through multiple layers of material. 5) I would suggest looking at a walking foot machine like the Juki DU-1181n (new c/w table and servo motor ~ $1400). Then there is of course the used market where you can save some dollars. kgg

I think this could be couple of simple things that can be easily check: Since you say the machine head is running smooth I would check and see if it is either the servo motor or the speed reducer by removing the belts from the speed reducer to the machine and servo motor and then depress the "go pedal". i) if it doesn't whine like before then it is probably a bad bearing in the speed reducer. You could try and oil the bearing but if the bearings are bad replace you have to replace either the bearings or the whole speed reducer. ii) If it whines like before then it is the motor and if it is a brush type replace the brushes in the motor. If it is an electronic one then I think you need to replace the whole servo motor unit. kgg

I don't have any plans but found a couple of links which maybe of some help: 1) Singer Class 7 with pneumatic reverse and Efka servo motor ( www.youtube.com/watch?v=u1RGcViVqc4 ) 2) Singer 7-31 with reverse and 7-33 hand wheel (https://leatherworker.net/forum/topic/79636-singer-7-31-with-reverse-and-7-33-hand-wheel/) photo's of backside reverse 3) The Reverse Feed Lever/Button on the Singer Model 353 Genie Sewing Machine ( www.youtube.com/watch?v=dYOx1U7Cs24 ) principle of how a reverse level works 4) Patents of reverse add-ons ( Link1 ) ( Link2 ) kgg

The PFAFF 60 is a domestic sewing machine made for sewing fabric not leather even through it was probably advertised as a "heavy duty" and or "industrial strength" sewing machine. I am sorry to say the PFAFF 60 machine is probably great for V69 thread and you maybe even able to squeeze V92 thread through it for fabric but it will not sew 8 oz of leather. Hopefully you can return it or keep it for other things. kgg

Nice repurposing. I must check my old clutch motors. kgg

I think you are over thinking this. If you are using a fabric needle to sew the 12 oz waxed and are not having any problems with the seam on the folded over sections of the waxed canvas adding some patches like at the corners with some 2 - 4 oz leather is not going to cause any problems or a pocket. If I am sewing 21 oz canvas I will probably go up a size larger then I can get away with for the size of thread on the needle anyway but haven't had any problems with attaching upholstery weight leather to the 21 oz canvas. Try sewing a scrape of leather in the weight you are planning on using to a double or triple folded piece of canvas as see what happens. kgg

I have thought of carrying one myself but my own limited investigation is that in Canada you can own one but and it is a big but if you use one on a dirt bag to protect yourself you maybe charged with Assault with a Weapon, Possession of a Weapon Dangerous to the Public Peace and / or Possession of a Concealed Weapon. Then the dirt bag if you are convicted will probably sue you. Where as simple weapons of opportunity like a pencil / pen / keys maybe treated differently. Choose wisely before carrying as the law tends to be on the side of the dirt bags. kgg