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Post by Ned on Feb 27, 2013 11:06:24 GMT -5
Agreed, the only other place to change force would be to change the ratio of the perch, itself. Also agreed that the hydraulic should have less frictional losses compared to a mechanical cable... I think I mentioned earlier though that it would be a good idea to talk to a seal company regarding the seals with the lowest stick/ slip I use Sealtech, Able O-Ring and Halllite For seals in Mississauga... The guy at Hallite is the best for tech assistance. They also specialize in metric seals. Hallite - great guy, Andrew, very helpful and pleasant, can't help. Sealtech - helpful and nice, non-stocking, 6 - 8weeks. (Parker product) Able o ring - helpful and nice, in stock, $10 each. NAPA - around the corner - great guy, 10 in stock, $3 a piece. I'm off to NAPA.
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Post by Walms on Feb 27, 2013 11:57:21 GMT -5
Glad you found them cheaper Dave! I guess there is something to say about automotive products quantity = cheaper.
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Post by Ned on Feb 27, 2013 12:00:11 GMT -5
Thanks for the resourses Andrew, always appreciated!
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Post by Walms on Feb 27, 2013 19:38:16 GMT -5
Did you end up with a buna-n x-ring?
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Post by sooperarthur on Feb 27, 2013 22:34:40 GMT -5
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Post by Ned on Feb 28, 2013 6:32:17 GMT -5
Did you end up with a buna-n x-ring? ?
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Post by Walms on Feb 28, 2013 7:08:13 GMT -5
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Post by Walms on Feb 28, 2013 7:11:03 GMT -5
Or this...
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Post by Ned on Feb 28, 2013 7:53:27 GMT -5
No and no. I want to stay away from those styles to keep the machining simple like me. I picked up the basic piston cup, but had some leaking issues last night.
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Post by Jim on Feb 28, 2013 9:32:03 GMT -5
Weird that you had a leak. Do you mean at the cup? That would be surprising. I wouldn't use the Magura system because it makes you continue to use a mechanical actuator. It's effectively just a hydraulic clutch cable. Andrew, you probably know, but here's how the piston cup goes in. The piston is blue and the cup is red:
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Post by Walms on Feb 28, 2013 9:39:41 GMT -5
FWIW the x-Ring uses the same groove dimensions as a standard o-ring, but it has less friction, theoretically anyway...
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Post by Ned on Feb 28, 2013 9:49:36 GMT -5
Jim, yes, around the cup. I think it is was an issue with my prototype. When I had it it the mill, I got my ins and outs backwards and drilled the banjo passage in the wrong spot. So when I assembled it, the piston pushed the seal over the passage partially. I might have compromised the seal. We will see tonight if I get time.
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Post by Walms on Feb 28, 2013 10:04:09 GMT -5
Picture not working Jim
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Post by Jim on Feb 28, 2013 10:27:47 GMT -5
Hmmm. How about now? I'm able to get it through a proxy server, so it should be there.
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Post by zambia on Feb 28, 2013 10:31:40 GMT -5
I see it...it doesn't make sense to me, but I see it.
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