Union lockstitch in action

[sheldonesh]

 

[Wizcrafts]

That Union Lockstitch is music to my ears. I've owned two so far and sold both of them off. I wouldn't be surprised if I end up with one more.

[dikman]

Most interesting. No measurements, he just eye-balled everything. That leather sounded pretty hard when he was bevelling the edges!!

[JLSleather]

Kid looks like he dun that before   Still not gittin' the whole "play some unrelated music and pan past a  bunch of unrelated tools" thing, but I do like the way that old gal lays a stitch!

 

[Matt S]

3 hours ago, dikman said:

Most interesting. No measurements, he just eye-balled everything. That leather sounded pretty hard when he was bevelling the edges!!

Sounded like he needed to strop his edger to me ;-)

[Wizcrafts]

5 hours ago, JLSleather said:

Kid looks like he dun that before   Still not gittin' the whole "play some unrelated music and pan past a  bunch of unrelated tools" thing, but I do like the way that old gal lays a stitch!

 

Unbeknownst to many used to modern sewing machines, the Union Lockstitch machines can be adjusted to lay down the tightest stitches in the World, followed by Campbell-Randall Lockstitch machines. The take-up mechanism is capable of locking the top thread 100% near the top of the upstroke. It is usually also set to a certain amount of lift to position the knots in the dead center of the layers.

[ethvan316]

Nice Video, I’m kinda curious on how the sewing machine is powered sounds like it’s pneumatic the machine had air hoses with air/water separator filters and a small motor it’s different never seen anything like it before.

[LederMaschinist]

That appears to be something like a Gast air motor.  Lots of power and torque in a small package.  Similar to this one:

http://vactech.com.my/product/vacuum-pumps/4am-gast/

I happened to just be looking at these yesterday with the idea of using one backwards as a belt driven compressor powered by the clutch motor to charge a small airtank that could be used for a pneumatic presser lift.

Edited December 10, 2018 by LederMaschinist

[sheldonesh]

On 12/5/2018 at 5:02 PM, sheldonesh said:

 

Yes, its a gast air motor. I think there is more control in comparison to electric motors

[Wizcrafts]

I never had trouble controlling my Union Lockstitch machines that were using continuous run motors. The tapered clutch on the back of the machine is very easy to feather. I was able to stop with either the needle up and foot lifted, or the needle under the throat plate and foot down. It stopped on a dime and gave me change when I heeled down on the go pedal.