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Agree. One of the members on the forum has a brushless servo motor that has a fin system moulded right into the small pulley. I am assuming that was done to try and help keep the housing cooler. Lets face it brushless servo motors are designed to last too as long as the warranty period and utilize a design to save on manufacturing costs. I doubt any brushless servo motor will ever come close to lasting as long as the big old heavy clutch motors that weight about 40 lbs. with real metal housings verses about 18 lbs of plastic and aluminum. Sort of like a Zippo lighter lasting a life time verses a BIC lasting a week or two. kgg

One more thing, I once stepped backwards onto the 8' high set of stairs I just finished taking all the treads and risers off of there was one riser still on that caught my ass, my foot caught the stringer, as I was falling backwards, I was then hanging upside down between the stringers my wife came to the doorway and yelled are yo all right I said I think so jus need to figure out how to get out of this. LOL

@fredk re: vintage radios, I have a shed with my collection of valve radios in . Along with parts, valves etc. It was a hobby in another life . Some are / were in working condition, some restored, table models and floor models ,but I have nowhere to display them in my house, no room The one that zapped me is a Philips (I think) single valve wood bee hive cabinet. When unplugged, it put out 95 volts ⚡️ . HS

Avoiding accidents #1: if you think Wow, this looks like something I shouldn't do then don't do it. #2 Everyone, well 99%of the time in that 10th of a second before something happens, you know it's going to happen. This is generally when using tools of some kind. like when that wrench just starts to slip and BOOM knuckles #3 rushing something not good or not paying attention, talking to someone while running that unforgivable table saw, you know that 5 horsepower one with the 12" or 14" blade, or that carving gouge you push toward your hand that's holding the wood you should not be holding and you know it!, or the safety glasses you know you should have on while driving cement nails dumbass stuff but we all do it, have done it, or will do it.

lol I saw the Nuge in 77, maybe that's why I'm deaf too. Couldn't have been those three big waukeshas that would bellar and backfire every time you started out of the hole with about 3 miles of pipe and spewing diesel smoke so thick you couldn't see five feet. A rig is a behemoth of energy, all steel and every part is pumping, turning, Electrified , moving, hot or oily, and slippery, pressurized with steam or 3000+psi mud. And built to drill holes 5 miles deep. And if your lucky you get to work derricks, 90 feet off the floor, latching pipe on a diving board 18" wide with only a safety belt tied to your ass. If you fall and are lucky enough dangle in mid air until someone can get up to pull you in. Oh, and possible poison gas or blowouts to think about while you work lol. Damn, that was fun times if you never thrown chain you missed out on one of life's biggest adrenaline rushes. '

Power is power, so if it requires a certain amount of power to pierce the leather, both motors, whether 9 coil or 12 coil, will generate the same amount of heat. It all depends upon the heat management of the motor design, so "should get rid of the heat better" is up for grabs until the longevity of the motor is proven. 12 coils will distribute the heat better, but it is still within the confines of the motor housing.

An almost accident but a powerful lesson learned. A guy in the pub asked me if I wanted a couple of days work. It wasn't until later that I found out that he was a nutter with no fear of heights at all. We went to a brickyard in Kent where they wanted another 12ft built on top of the chimney. It was tall but not so tall that this guy had built some scaffolding around it up to the top level. I use the the word "scaffolding" in the loosest possible terms. When we first got there I went up for a look at the view. No guardrail and only 3scaffold boards wide. Not impressed. My job was to send up the bricks and mortar. On the second day I found myself well in front so I went up to look at progress. He'd built around 4ft. I was on my haunches livening up the mortar out of the strong wind until I stood up. I was already on the last board, the wind got me and I did the proper windmill bit with my arms. I still wonder how I managed to stop from falling to this day.

now these are cool!!! Haven't seen one of these in years, in grade school art class, we had some that just had a straw and you blew through them to create the air pressure. Once upon a time, these were in almost all wood shops for shooting stains and such.

My experience with a cheap digital brushless servo motor that came with my TSC 441, 16" cylinder arm clone has a speed range of 500 - 5000 rpm on it's 800 watt, 9 coil and with no reducer pulley on the machine: Calculated: 1. Top speed of the hand-wheel pulley should come in at 156 rpm using: i) a 160 mm hand-wheel pulley size, ii) a 50 mm motor pulley iii) with the motor speed set to the minimum speed of 500 rpm's. This particular servo motor is a 800 watt brushless 9 coil servo motor with a speed range of 500 to 5000 rpm's. Measured: i) The hand-wheel pulley measured out to be 159mm. ii) The small pulley at the motor measured out at 49mm. Measured results: i) with 500 rpm's showing on the controller screen ii) with the foot pedal fully depressed the rpm's with my digital tachometer showed 154.5 rpm's with no material under the needle iii) with the foot pedal feathered to get the minimum hand-wheel pulley speed the digital tachometer showed a low rpm reading of 61 rpm's with no material under the needle. From that I can assume a no load ramp up speed of 61 rpm's. I'm assuming the 50 rpm speed they are quoting is done in a similar manner. With everything being equal a 12 coil should get rid of the heat better then a 9 coil operating under the same load conditions. kgg

In a previous life I was a fabricator/welder using stick welding and I had to visit The Royal Eye Hospital in London a few times. Because the slag is non metallic they can't take it out with a magnet. They have to dig it out. The first time I put my chin on the black and chrome contraption the guy on the other side comes at you with this spikey thing, shines a really powerful light in your eye and says "Don't move, don't blink" and then pluck pluck. Believe me with the tears falling down you face you don't move and you don't blink. When I was done a big black nurse put drops in my eye and started to bandage me up. It got tighter and tighter and I think I might have fainted. (I was only a whippersnapper). My trauma didn't end there ........ I'm outside waiting at a request bus stop at the end of a long wide road which is a one way. The buses turn into the road about 250yards away and if no-one has their arm out on my side they keep over to the far side ready to turn right. Half an hour later, there's me still there because I couldn't see the number on the bus with my one eye until it was too late and he was turning right across the road. Eventually I learned to hail whatever bus turned around that corner.

My first rock concert was Ted Nugent in 1980. We rolled down the windows on the drive home, and it took a minute or so to realize we couldn't hear any wind noise! I'm convinced my hearing still isn't entirely back to what it was before! Does that count?? -Bill

just figured I could be wrong with that - just found this thread regarding a 105-27 and it seems to have screws in this subclass. 😉

some more Hope the pics help setting up yours. Mine still has thee original clutch motor but your seem to have a modern servo motor alreday. If you need more detailed pictures let me know.

Here are some pictures of my 8346-30. BTW when you look at the data plate the number below "BAUJAHR" is the year when it was made.

At 42 I'm still pretty unscathed, apart from the occasional flesh wound (scratches, punctures, cuts, mildly crushed limbs, broken nails) but I've never been seriously wounded. I cracked a shoulder blade once by driving my bike straight while the road curved and I hit a crash barrier at about 80km/h (50 mph) and I also dislocated a shoulder once when falling during a hike. Lucky for me, neither of those accidents had any lasting damage. The only lasting damage I have is caused by spending an evening next to a thickness planer without hearing protection. I spent a few weeks going crazy with tinnitus, after which it slowly died away, together with the ability to hear certain frequencies. I'm still lucky the tinnitus didn't last (it does come back when I'm tired though) and I only have have around 12dB hearing loss. Since then I always wear hearing protection when working with machines or driving my bike. During my bike crash I was lucky to wear leather and since then I've ditched my textile bike gear.

what I have noticed so far is: The needle plate / throat plate seems (!) to be modified and an the needle plate is missing material (or a deflector cover) left side of the roller foot / feed dog. Maybe this is something custom made but I can`t tell from the pictures. Not sure why this is but it is / looks unusual IMO. BTW - the original 105-27 came set up as jump foot machine and not with roller foot. So seems your machine has been modified quite a bit. But this could be custom made and I don´t want to judge this but it is not how the machine left the factory. In your video it seems (!) that 2 thread guides are missing, one on the needle holder (seems to be ground off somehow) and one on the face plate. Therefore the thread is "bouncing" around. This may affect the loop forming and that could cause thread breaking. EDIT I: Some one has modified the shuttle race as it seems. Your is held by 2 screws (maybe they are too tight???) but originally it has a U shaped sheet metal leaf spring that is holding the shuttle race in place. But again - could be a modification a customer asked for. Hard to tell w/o knowing the history of the machine. EDIT II: some pics of how the thread guides look on an Adler 104

Thank you, I'll give it a try this weekend. And make a video and look at the hook to needle timing! If the hook to needle timing was wrong, how would I go about adjusting it? It is indeed a beautiful old machine, very happy with it. I wasn't prepared for its weight when I went to pick it up from the seller 😅, my arms hurt for days 😆

@X24 A few years ago, I was friends with a guy and lady who were producing bespoke shoes and boots. After a couple of years, she left the partnership and went on her own. She decided to make moccasin style footwear. She enlisted me to help find some suitable sewing machines. To my amazement, I discovered a specialized shoe sewing machine that is called a "sole sidewall stitcher." This type of machine combines the vertical sides attached to the soles to the uppers, all around their sides. I did a quick Google search and discovered that some of our own advertisers sell these sidewall stitchers. Brand names that come to mind include Cobra, Cowboy and Techsew. Although not an advertiser, yet, Campbell-Randall in Texas also carries these machines. You can see them in action in the videos in a 2017 topic linked to in the topic below. Here is a previous discussion about sidewall stitchers on Leatherworker.net:

http://hightex-solution.com/blog/technology/2024/0425/315.html?1714026959 This is the Hightex site with info on the 750SH model, which I assume is what we're discussing here. There is a video at the end showing it in operation. It does appear to have reasonable torque at slow speed, but no better than running a cheap servo and speed reducer. For a factory maybe it's an advantage not to have to fit a speed reducer so paying a higher price for a servo may make sense? I said earlier though that for the hobbyist is it cost effective? Not for me, particularly with more than one servo, if a cheapy servo dies I'll simply replace it with another cheapy servo (and save $300+). Interestingly, the link shows a 9-coil motor. Gerry does raise a point about heat generation when running a motor very slow.

If Barbara at Y-Knot doesn’t have 2.7 mm she or I have tools available to cut down lace to any width.

See if "Y-Knot Lace" stocks it.

Yes, I have compiled a table. Please check it out. I hope it helps you too.

Will you ship worldwide? Or just US? We have members everywhere.

Torque from a motor depends upon current in the windings and the number of poles (basically, I'm not a motor expert) so without a speed reducer of sorts, the motor has to be very robust to maintain high torque at slow rpm and cooling is paramount. The speed reducer gets the motor rpms up where cooling is better, current is lower and torque is higher because of the gearbox. As far as the OP is concerned, I don't understand why he can't just tell us his new motor/system specs; why all the mystery?

I've got a machine with a servo that does 100RPM startup and a speed reducer. Today I counted 14 stitches in 30 seconds. 50RPM would give me 7! But, I'm slow enough.