Fly press

[Natlek]

This two/thread screw is lying around my shop more then 15 years . It is 6 centimeters Dia. This blue part used to be air press for work on truck/car clutch and drum brake pads........What do you think , is it worth the effort to make them fly press ? I have hydraulic press /50 tons/ but it is with hand pump and is very slow.....I watch this video and looks like this will work ? I'm just interested to try to work with small pieces, around inch max.thickness ?
I like it because it's quiet , because I live in very urban area .........

I just measured.......screw have one inch travel on full circle ?

 

[Stacy E. Apelt - Bladesmith]

Sounds like a fun project. A large wheel with plenty of mass should spin that nicely. Maybe a flywheel off a big truck would work.

 

[Randy3000]

I am not sure i understand the first sentence. Is it two threads per inch or two inches per thread?

I have thought about a fly press for controlled stamping of nail nicks and maker marks, as opposed to a bottle jack type press. Can control the fly wheel radius and counter weight easy to adjust pressure.

 

[Lieblad]

I am not sure i understand the first sentence. Is it two threads per inch or two inches per thread?

Neither, its a two start thread.
Multistart threads are common on machines what use screw driven functions.
It allows less thread per inch for faster travel per revolution. Multiple threads create more thread surface area for higher strength.
Guesstimating based on that cigarette pack, one revoloution may travel about 15mm. Were that a four start thread, travel would be 30mm/r and so on.

 

[Randy3000]

Oh, i get it. There are two independent spirals along the screw.

 

[3fifty7]

I was thinking 2” diameter.

 

[Natlek]

Neither, its a two start thread.
Multistart threads are common on machines what use screw driven functions.
It allows less thread per inch for faster travel per revolution. Multiple threads create more thread surface area for higher strength.
Guesstimating based on that cigarette pack, one revoloution may travel about 15mm. Were that a four start thread, travel would be 30mm/r and so on.

This one have 25mm travel . Not much but will work I hope ? I wonder will this thrust ball bearing hold out ?

 

[Natlek]

Sounds like a fun project. A large wheel with plenty of mass should spin that nicely. Maybe a flywheel off a big truck would work.

Yes , I will use big heavy flywheel .Most because of short travel , about one inch. With wheel will be much easier to turn/operate a quarter of a circle no matter in which position/height is screw .