37* JIC Tube Fitting - how to make??

45cole

Member
I have a sweet Rigid set of 45* and 37* flaring tools (single flare) and a case 646 that is in need of hoses (will cut and flare the iron tube to make compatible with hoses rather than buy the whole hose/tube run).

How do I do the tube -> hose joint? I thought just a 37* flare and a tube nut but my 646 connections have a double 37* flare with a ferrule. Is this needed? Are the ferrules specific to 37* or will the copper ones work?
 
If you are talking about the bulged ferules then no flare needed if you are meaning the squared off should type behind the flare then yes it is needed to back up the flare. I would just run hoses to cylinders if they are already that. If not then the line can go to a JIC fitting that fits the nut on the line then the other end of the fitting could be pipe thread to get cheaper hose.
 
Never had any success trying to do double flares with a hand tool.

Never seen a flare that also used a ferrule. Are you sure it's not just a
steel ferrule? The ferrule may be specific to the brand fitting.

You can't use brass ferrules on steel line, they are not hard enough to bite
into the steel and will blow out or leak.

If there is an industrial pipe and hose dealer nearby, they can identify what
you have and make a recommendation.
 
37 degree flare on tubing would use a backing sleeve, not a ferrule, I believe. The sleeve helps get pressure on the flare and aids tightening.

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I agree with Steve@Advance about going to an industrial tubing, pipe, hose shop and see what they recommend. There is a lot of steel tubing used on industry. They may have the proper type compression fittings to go on your steel tubing that have 37 degree ends for a hose to connect to. Braze on/weld on fittings are another option.
 
Thanks for the replies guys, I dug a little deeper and found that I need the sleeve, rather than a ferrule. I have the tube nuts and JIC fittings, just needed the tube sleeve. Never messed around with fabing hydraulic hardpipe and so was interested in doing it (learn something to be applied to future projects). Essentially I found what that pic represents, wish I would have seen the pic earlier! Thanks for the info, much appreciated.
 

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