Re: Making your own hard line hydraulic lines

Posted by NC Wayne on November 23, 2004 at 20:29:57 from (152.163.101.7):

In Reply to: Making your own hard line hydraulic lines posted by cootbruce on November 23, 2004 at 07:11:08:

Your local hydraulic shop should have or be able to get you the tubing as well as the nut and ferrel to go on the end. Hydralic flares are high pressure, but they aren't double flares, they are simply a single 37 degree flare (used to be called a JIC, but now there is actually another "industry name" even though JIC is still commonly used). The first thing you need is to cut the tube square, and any good tubing cutter will handle that task ok. I hunted through several different catalogs, from Grainger to MSC to J&L to Travers, as well as calling around all over town looking for the flaring tool itself. Everybody had the standard 45 degree stuff for gas but not the 37 degree. I finally found the flaring tool through McMaster-Carr. I got the larger one from them to do 3/4" -1" tube for a job about 3 months back, and just ordered the smaller one to allow me to do from 1/4" - 1/2 inch end of last week. They are both in the $300+ range so don't be shocked when you go looking and see the prices. We've gotten by for years without them but I have a job to do requireing me to make up all new lines going down the side of the boom on a excavator. They range in size from 1/2" through 1". Since it's a custom thing unfortunately there are no factory lines available, so I've got to have everything or turn down the job, and "that ain't gonna happen". For the bending your typical tubing is .197 thick so it's fairly hard to bend. Still the smaller lines (1/2, 3/8, etc) can be done with your typical tubing benders made for that size hard line, but when you get into the larger stuff (1/2 plus) you need to step up to at least a heavy duty conduit bender. The main thing, with bending any tube is to have the right tool with the proper raduis for the tube size your doing and don't try to overbend or you will crimp the line. If you need a long sweeping bend you can take the tube to a sheet metal shop and let them gently run it through a slip roll to get the initial curve and then clamp it in a vice and slowly work it to the final shape from there. For this boom job I've talked to somebody that does it all the time and they told me have a setup to clamp to the boom to bend the tubes in place. I've got an idea of what their doing and am gonna try to make one for myself...wish me luck... I hope this answers your questions, and good luck. Wayne

Follow Ups:

• Re: Making your own hard line hydraulic lines NC Wayne 16:00:05 11/24/04 (0)
• Re: Making your own hard line hydraulic lines cootbruce 08:19:18 11/24/04 (0)

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