Seiko CW8B head pulley swap

[DannyGray]

Has anyone changed the pulley on the head of a Seiko CW8B machine. I am looking to put a larger pulley on it. This machine is the same as a Techsew 2700. I am asking for this info before hitting the machine shop and making one.

[Darren Brosowski]

There are not any pulleys much larger that will fit on that shaft.

Have you got the smallest pulley possible on the motor?

 

[DannyGray]

I have a 2" it goes slow but I want it even slower so I guess I will have to use a lathe and make one or get a reducer setup.

 

[brmax]

It may be easier to use a servo style motor unless a regular supply of thick leather is always going to be sewn.

If the latter probably a reducer setup is the route you want to head toward really, as it would be better by far than a 2" larger big pulley.

Floyd

[dikman]

Danny, you won't find a pulley that is much smaller than the 2". As Floyd said above the best way is a servo or a speed reducer (not that hard to make). I've fitted a servo + reducer to two of my machines and a servo + larger head pulley to the Pfaff. (Even with a speed reducer I still couldn't control the clutch motor enough for my needs).