Fitting an adjustable damper to my power saw

I think I've got that covered by getting a cylinder that has a little longer than necessary stroke so will never fully empty the restricted end and having filled and bled hydraulic table jacking systems in my last job I think that is sorted as well

Such open systems, both with and without dust cover arrangements, seem generally to be known as dashpots.

Single acting hydraulic cylinders with the return end open to atmosphere via suitable valve or drilling, so there are no pressure or rod volume effects, are functionally equivalent. I'd be unsurprised to discover that hydraulic cylinder types are commonly used which the more sophisticated variety of flow control valving arrangements.

No real idea where the distinction between dashpot and single acting hydraulics lies. I'd guess that a dashpot system is one that can be filled from a jug or squirt can whilst a hydraulic cylinder may need more sophisticated arrangements. Both arrangements are obviously self bleeding so no special efforts are needed to extract air entrained during the filling process. However a single ended hydraulic system may require a few operating cycles to clear any air that may have got in.

Clive.

I used a pneumatic ram on mine with a small header can to allow for the difference in cylinder volume due to the piston rod . I eventually switched over to a larger header can with the pick up pipe submerged in hydraulic oil , it is just a re purposed fuel tank off a briggs horizontal engine mounted below the vise locking handle - its not pretty but it works well , i made a metering block that also serves as a pivot point for the ram .

Larry Phelan,

I have pm'd you.

Martin P

With thanks to Larry Phelan and Mike Cox I now have all the information to modify my saw with a damper but I now have another question.

I was given my saw, a band saw type and similar to the Warco 4.5" universal Bandsaw, in a very sorry state which meant I had to strip it completely and clean, rebuild and replace bearing guides, it had a replacement electric motor when I got it so I've never queried its direction of cutting, the blade cuts on the forward stroke but now I'm not sure if its running in the right direction, any views please.

Larry, Can you please confirm your address as its partially unreadable on the envelope the magazine came in.

Martin P

Edited By martin perman on 29/11/2018 13:28:15