AndersK
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- Thread starter scottmk1
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Hood
I am obsessed.
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That was Cutwel but they all do them, MSC etc and probably every Chinese seller out there.
scottmk1
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No I just used drills to form the bores. On the original blocks, the O-ring at the bottom and the sealing ring half way up the body don't seal on the tapers, just on the surface on the actual bore itself.
The tapers aren't for sealing - they are to assist in allowing the seals to pass into the next section without damage, pinching or rolling.
Your drills will have to have been in excellent condition to get a surface finish suitable for hydraulic sealing - 63 microinch is worse what I might specify.
Parker, James Walker, even suppliers like Eriks, have excellent guides on sizes, finishes, shapes etc for o-ring use and design.
Your drills will have to have been in excellent condition to get a surface finish suitable for hydraulic sealing - 63 microinch is worse what I might specify.
Parker, James Walker, even suppliers like Eriks, have excellent guides on sizes, finishes, shapes etc for o-ring use and design.
scottmk1
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I did look on various hydraulic companies websites and while I could find plenty of info like you say, I couldn't find much about the correct taper for the top O-ring recess.
The drills are OK, however the probably don't meet the requirements for surface finish, it looks OK to me though.
Pete.
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I'm not so sure that the drawing is 100% correct for the valve shown. It looks like the 10mm diameter extends past the second taper and the 8.75mm diameter bore is too short.
BTW if that's a felt seal next to the pilot hole then it is almost certain not to work in a drilled hole. Reamed would be the minimum acceptable finish I should think.
BTW if that's a felt seal next to the pilot hole then it is almost certain not to work in a drilled hole. Reamed would be the minimum acceptable finish I should think.
mike os
just a little insane.....
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Of its not good enough it will pass the seal... looking at 200 bar/6000psi internally on hydraulics as a guide
Pete.
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Ah, not the right drawing at all. These are much larger than the dimensions shown.
pressbrake1
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I use 15°-20°for seal guidance angles
Pete.
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scottmk1
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Nice one Pete, I was looking at that catalogue, but had only got as far as pages 60 and 61
Johnnybravo
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If I need custom tooling I either grind them by hand and check the profile on a shadow graph, or draw them up in CAD and wire edm them from either toolsteel or carbide, depending on the application.
scottmk1
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Will do, thanks.
scottmk1
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They can't help with the form tools unfortunately, but I do have a tapered end mill on the way to cut the taper seat for the O-ring
scottmk1
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They maybe could, I only asked them if they could supply the tooling to form the cartridge, which they can't. They did send me the drawings so I can do it myself though.
