4x6 Bandsaw stand and down feed

[chowpay]

Made a stand and a bolt on hydraulic downfeed







Original Thread

[kbalch]

Thanks chowpay! I've added your Bandsaw Stand and Hydraulic Downfeed to our Metalworking category, as well as to your builder page: chowpay's Homemade Tools. Your receipts:

Bandsaw Stand by chowpay

tags: bandsaw, stand, welding

Hydraulic Downfeed by chowpay

tags: bandsaw, hydraulic, pneumatic, cylinder

[DIYer]

That's a nicely done downfeed.

[cavemandave]

slick and very innovative

[Paul Jones]

Nice compact design and great workmanship. I have been considering doing something like this. Thanks for the posting, Paul

[tmoore4748]

Made a stand and a bolt on hydraulic downfeed



Original Thread

So, here's what's probably going to be seen as a dumb question: how do you lift open the saw, without acting against that valve? Do you simply open it up all the way, raise the saw, then close to the required feed for each cut, or is there a check valve or bypass valve in there somewhere ?

[repeters]

Can you post the part #s you used for the downfeed piston assembly, couplers and fittings less the homemade end connector? I would really laike to try and put this on my saw.

[Frank S]

In answer to a couple of previous posters I have retrofitted numerous different sized band-saws with much the same design system as the OP has done.
The valve he used is called a metered flow control valve these have a built in check ball and bypass passage they re essentially free flow in 1 direction while having a metered flow VIA a needle valve for the other direction.
the size of the cylinder to control the rate of fall lrgly depends on the size of the band-saw and how it is mounted.
It takes the use of a small amount of math to calculate the weight of the saw head being lowered in relation to the length of the length of the lever arm to the pivot of the saw versus the area of the piston on the rod end of the cylinder using the 1st class lever principal for a cylinder mounted in the pull direction or a 2nd or 3rd class lever principal for those mounted in the push direction.
Additionally I prefer to have a small reserve reservoir feeding the neutral pressure side especially for large heavier saws requiring requiring larger diameter pistons and rods