4 x 6 bandsaw hydrolic feed

[deere_x475guy]

Well gang, not alot of welding to this project. Will, Aaron and I got together at my home today and figured out the plumbing and bracketing for the Cylinders and pop off valve that Will tracked down for us.

I am pretty happy with the results of the feed on this. Its as slow as you want it to get and very smooth. The pop off valve allows you to just lift the cylinder off after the cut is finished without changing your feed speed settings. Will...great job on tracking all this stuff down.

Here is the first pic.

[deere_x475guy]

another pic

[deere_x475guy]

this is the front mounting bracket

[deere_x475guy]

The back clevis

[deere_x475guy]

This is really handy. You can shut down the cylinder just above your work so you can align your cut marks with the saw blade. Another time saver


have a great weekend all

Bob

[Will]

Just to let everyone know the specifics....we used a cylinder with 1.25 bore and 8 inch stroke. Now that Bob's design is complete, it looks like we could get by with a 5 -6 inch stroke on the cylinder. You can find cylinders like these on Ebay for less than $10. The control comes from a hydraulic poppet valve that free flows in one direction and has a needle valve for control when the flow is in the opposite direction. Again, found these on Ebay at less than $10. Add a few fittings, tubing and oil and you have a controlled feed for your bandsaw for about $25. If you mount it in place of the tension spring assembly as Bob did, the mountiing brackets are easy to fabricate. The toughest part is getting the oil in and all the air out!

[Bobby]

Good work fellas. I just unpacked and assembled my HF 4x6 bandsaw last night.

Anymore specs info about how the hydraulic stuff works? I know as much about hydrolics and i do about sewing

[deere_x475guy]

Originally posted by Will
Just to let everyone know the specifics....we used a cylinder with 1.25 bore and 8 inch stroke. Now that Bob's design is complete, it looks like we could get by with a 5 -6 inch stroke on the cylinder. You can find cylinders like these on Ebay for less than $10. The control comes from a hydraulic poppet valve that free flows in one direction and has a needle valve for control when the flow is in the opposite direction. Again, found these on Ebay at less than $10. Add a few fittings, tubing and oil and you have a controlled feed for your bandsaw for about $25. If you mount it in place of the tension spring assembly as Bob did, the mountiing brackets are easy to fabricate. The toughest part is getting the oil in and all the air out!

Thanks Will, I should have included that also...

[Will]

Bobby,
The cylinder has a piston inside that is moved by the rod. Each side of the piston is filled with oil and there is a tubing connection between the two sides of the piston that goes through the poppet valve. This valve provides a variable restriction in the line to control the oil flow from one side of the piston to the other side. The more you pinch the valve closed, the slower the saw goes down. In the reverse direction (lifting the saw), a one way valve (check valve) that is built into the poppet valve opens to allow you to lift the saw without restriction. There aren't any other connections to a pump or anything like that.

[deere_x475guy]

Originally posted by Will
Just to let everyone know the specifics....we used a cylinder with 1.25 bore and 8 inch stroke. Now that Bob's design is complete, it looks like we could get by with a 5 -6 inch stroke on the cylinder. You can find cylinders like these on Ebay for less than $10. The control comes from a hydraulic poppet valve that free flows in one direction and has a needle valve for control when the flow is in the opposite direction. Again, found these on Ebay at less than $10. Add a few fittings, tubing and oil and you have a controlled feed for your bandsaw for about $25. If you mount it in place of the tension spring assembly as Bob did, the mountiing brackets are easy to fabricate. The toughest part is getting the oil in and all the air out!

Will, I pretty much have the system down to getting all the air out. I am still let with just a minor amount of air in system. I have that figured out and am going to get to that this evening along with reinforcing the bracket at the front of the saw (it flex's slightly and is bugging me ). If you and Aaron want to come over for a bit this eve I will be out in the garage working.

Bob

[chabat]

What search words on ebay would I start with:

1) for the cylinder?
2) for the valve that controls the feed rate?

[Broccoli1]

is this something that could be used?

http://cgi.ebay.com/Hydraulic-Cylinder-1-5-bore-1-rod-5-3-8-stroke-NEW-NR_W0QQitemZ7607322557QQcategoryZ48718QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

[chabat]

Broccoli, I hope you're not asking me! But I see that they have more than one for sale... So if someone knows -- Chime in!!

[tailshaft56]

It's certainly more than heavy enough, You will still need the valves and fittings.

[Broccoli1]

I was asking for ya

http://cgi.ebay.com/2-PARKER-MINI-BRASS-VALVE-AIR-HYDRAULIC-GATE-VALVES_W0QQitemZ7605571908QQcategoryZ42932QQrdZ1QQcmdZViewItem

More stuff I have no idea about