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| Titivating a Warco Mechanical hacksaw! |
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| awemawson:
Interesting ! The adjusting knob shows up quite clearly on several of his pictures |
| awemawson:
At a conceptual level you need a needle valve in parallel with your ball valve introducing a 'controlled leak' adjusted from a rod though the hole in the lid. How you implement it might be a bit more complicated. :scratch: |
| mattinker:
Thanks Andrew, I can see a way of doing it, a needle that can apply pressure to the ball valve from the top. I need to experiment when I get it back together. There is one thing that I need to confirm before I do anything else, it's the flow of oil when the saw is on the cutting stroke. On the return stroke, the small piston goes down, sending oil to the big piston pushing up the arm. When the blade reaches the end of it's stroke, the cam allows the small piston to rise (under pressure from the weight of the arm pushing the piston down) uncovering the port on the side of the small cylinder (it's about half way up) which lets the oil out of the large cylinder allowing the arm to drop, the port is open throughout the cutting stroke. At least that's what I can see so far! The saw in the video doesn't have anything on the to of the cover. I've written to the poster in the Madmodder's thread on rebuilding the mechanical hack saw, it would be easier to have something concrete to work from! Matthew |
| awemawson:
The one in the video doesn't have the hole in the lid like yours - obviously an inferior model to your top of the range one :lol: |
| 2nd Opinion:
That's a great find. Sent from my iPad using Tapatalk |
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