MWF FEED
2nd February 2023, 02:31 PM
Anyone familiar with the guts of the small screw in type puller rams and how they work?
Like this:
TTI Hydraulic Gear Puller Ram | Total Tools (https://www.totaltools.com.au/ramgear-hydraulic-puller)
My Google ability seems to be broken today, and I haven't been able to find anything decent online about them.
I've got a pretty reasonable Chinese puller set with that style of ram.
Actually the legs are good, but the ram is basically a fake hydraulic one. Inside its just a screw thread that pushes directly on the output plunger and is no more effective than using a bolt :(
I'm assuming they are probably a differential piston design - the input screw pushes a small piston, that pressure is transferred hydraulically to a larger piston (and therefore larger force) on the output end. Seems like the hydraulic medium is usually grease.
Might be an interesting project to make ....
Steve
Read the full thread at metalworkforums.com... (https://metalworkforums.com/showthread.php?t=208896&goto=newpost)
Like this:
TTI Hydraulic Gear Puller Ram | Total Tools (https://www.totaltools.com.au/ramgear-hydraulic-puller)
My Google ability seems to be broken today, and I haven't been able to find anything decent online about them.
I've got a pretty reasonable Chinese puller set with that style of ram.
Actually the legs are good, but the ram is basically a fake hydraulic one. Inside its just a screw thread that pushes directly on the output plunger and is no more effective than using a bolt :(
I'm assuming they are probably a differential piston design - the input screw pushes a small piston, that pressure is transferred hydraulically to a larger piston (and therefore larger force) on the output end. Seems like the hydraulic medium is usually grease.
Might be an interesting project to make ....
Steve
Read the full thread at metalworkforums.com... (https://metalworkforums.com/showthread.php?t=208896&goto=newpost)