Flaring tubing

[Discount Hydraulic Hose]

Reading the descriptions at Mastercool Inc., Flaring Tools it appears that all of the Mastercool flaring tools use the same yoke with different sets of attachments for 45 or 37 degree flares.

The flier says "handheld hydraulic pump operates easily with all steal (sic) and light stainless tubing." If you need more specific information about the wall thickness, etc. you can flare with this, I suggest contacting Mastercool. Technical support is available at 888-825-6989.

 

[J_J]

Reading the descriptions at Mastercool Inc., Flaring Tools it appears that all of the Mastercool flaring tools use the same yoke with different sets of attachments for 45 or 37 degree flares.

The flier says "handheld hydraulic pump operates easily with all steal (sic) and light stainless tubing." If you need more specific information about the wall thickness, etc. you can flare with this, I suggest contacting Mastercool. Technical support is available at 888-825-6989.

Ken,

What reference do you have for the same flare using both 37 degree and 45 degree on the same flare? Otherwise, is the flare capable of seating both 37 and 45 degree fittings? I have never seen this.

My opinion is that all JIC fittings are 37 degrees, and a 45 degree fitting will not fit correctly.

SAE and AN/JIC fittings are completely incompatible due to the different flare angle. Further, AN fittings (or those complying with subsequent standards) and JIC fittings are not interchangeable for design-controlled applications due to differing quality standards.


Just some additional data.

http://weislake.com/sig/mucker/an-vs-jic.pdf

 

[crazyal]

The dies I'm talking about are 37°. I've included a picture. I don't think anyone is talking about trying to use tube flared to 45° on a JIC 37° fitting (or vise versa).

J_J thanks for the link. As I said I'm still trying to learn. I'm under the impression that the differences between AN and JIC are the fittings, things like thread pitch. I assumed, correct me if I'm wrong, that as long as I use all JIC fittings and tube nuts and flare the steel tube at 37° then there shouldn't be any compatibility issues.

I've been using this image as a guide. The gold color is the fitting, the blue is the tube nut, the pink is the sleeve, and the gray is the flared tubing.

 

[KML]

Good info here but want to point out that JIC 37 and AN are completely interchangable unless you are building a commercial Aircraft or working under a contract for the Government that requires the use of AN fittings. For hydraulic or automotive use they are COMPLETELY interchangable. AN fiitings simply conform to a higher materials and thread dimension tolerance. From J_J's link above:

"As a result JIC or SAE 37 degree fittings are perfectly interchangeable with AN fittings, and while this may not be acceptable for military aviation use, for automotive use there is no downside other than perhaps mismatched color coordination as JIC fittings are not available in the pretty anodize aluminum colors. However this may be a worthy tradeoff considering the JIC fittings are a fraction of the price of their true "AN" counterparts"

I do A LOT of work with both JIC and AN fittings and the true AN stuff is expensive. The hose fitting in the picture is a 20AN for teflon hose and cost about $160 each.

The blue and gold fittings are both 1/2" NPTM to -8 AN the blue one is a true AN fitting (~$11) and the gold is a JIC 37 (~$1.50). They will physically, completely interchange!

The middle pic is of my fittings bin. 95% are true AN and the rest JIC, ORB, and even some Dyna Tube.

I didn't read this on the internet, I just took these pics in my shop. - JIC 37 and AN will completely interchange unless your design/contract criteria call for the more stringent standards of the AN. You will find VERY few true AN components in any hydraulic shop, they are insanely expensive compared to their JIC counterparts. The 45 deg stuff IS completely different and WILL NOT interchange safely.

 

[Discount Hydraulic Hose]

Ken,

What reference do you have for the same flare using both 37 degree and 45 degree on the same flare? Otherwise, is the flare capable of seating both 37 and 45 degree fittings? I have never seen this.

My opinion is that all JIC fittings are 37 degrees, and a 45 degree fitting will not fit correctly.

SAE and AN/JIC fittings are completely incompatible due to the different flare angle. Further, AN fittings (or those complying with subsequent standards) and JIC fittings are not interchangeable for design-controlled applications due to differing quality standards.


Just some additional data.

http://weislake.com/sig/mucker/an-vs-jic.pdf

My post that you copied was not about the flare angles, but about Mastercool tool and was intented to answer the question of whether or not the original poster could use his tool (with the additional 37° adapters) to flare hydraulic tubing.

http://www.mastercool.com/pages/flaring_tools.html

The link above shows half a dozen different flaring tool sets from Mastercool. All of the descriptions include parts list, and for each set, the yoke and pump assembly have the same part number (71201).

It appears to me that if he buys the additional adapters, he's going to have the exact same tool he would have if he originally bought the 37 degree tool set.

 

[Wayne County Hose]

Good info here but want to point out that JIC 37 and AN are completely interchangable unless you are building a commercial Aircraft or working under a contract for the Government that requires the use of AN fittings. For hydraulic or automotive use they are COMPLETELY interchangable. AN fiitings simply conform to a higher materials and thread dimension tolerance. From J_J's link above:

"As a result JIC or SAE 37 degree fittings are perfectly interchangeable with AN fittings, and while this may not be acceptable for military aviation use, for automotive use there is no downside other than perhaps mismatched color coordination as JIC fittings are not available in the pretty anodize aluminum colors. However this may be a worthy tradeoff considering the JIC fittings are a fraction of the price of their true "AN" counterparts"

I do A LOT of work with both JIC and AN fittings and the true AN stuff is expensive. The hose fitting in the picture is a 20AN for teflon hose and cost about $160 each.

The blue and gold fittings are both 1/2" NPTM to -8 AN the blue one is a true AN fitting (~$11) and the gold is a JIC 37 (~$1.50). They will physically, completely interchange!

The middle pic is of my fittings bin. 95% are true AN and the rest JIC, ORB, and even some Dyna Tube.

I didn't read this on the internet, I just took these pics in my shop. - JIC 37 and AN will completely interchange unless your design/contract criteria call for the more stringent standards of the AN. You will find VERY few true AN components in any hydraulic shop, they are insanely expensive compared to their JIC counterparts. The 45 deg stuff IS completely different and WILL NOT interchange safely.

Thank-you. If it comes from me, it is automatically questioned. If it comes from somebody else, then it is believable.

 

[Discount Hydraulic Hose]

Thank-you. If it comes from me, it is automatically questioned. If it comes from somebody else, then it is believable.

Here's your original quote.

"I have the same set and have made dozens of SAE flares, installed them on JIC and never had a problem with leaks. The industry recognizes the two flares as being interchangeable."

This was questioned, not because YOU said it, but because it implied that 45 degree flares (SAE) are interchangeable with 37 degree flares (JIC). In most cases, they are not. That has been clarified in several other posts now, as it should be.

Where I think some people are confused is that AN fittings have been brought into the discussion. For industrial purposes, AN fittings and JIC fittings can be interchanged. They both have the same flare angle and approx. thread dimensions. SAE 45 fittings are different, though, and NOT completely interchangeable, as your first post suggested.

We could go over the details forever. Depending on how technical one wants to get, we likely have only scratched the surface in discussing this flare or that flare. What I hope none of us do is to take any of this personally. That would be a shame, and a detriment to this forum.

 

[KML]

Ken,

You are right in that we have just scratched the surface. I agree that the important thing is that folks reading this understand that JIC 37 is all that is needed and justified for hydraulics and the flare tool the OP was asking about will work fine for both AN and JIC with the the 37 degree inserrts.

45 deg is not intended for hydraulics and is often more expensive than the proper JIC fitting so there is no good reason to use them.

BTW, I buy most of my JIC stuff from you:thumbsup:

 

[J_J]

While not completely interchangeable, there are some commonalities that allow you to interchange SOME flare fittings.

In the sizes -02, -03, -05, -08 and -10 only, the threads of SAE 37ï½° flare (JIC) and SAE 45ï½° flare are the same. However, the sealing surface angles are not.

Some female swivel fittings in these sizes are actually dual seat, with two sealing surfaces (one at 37ï½° and one at 45ï½°), allowing the female to mate with either a 37ï½° male OR a 45ï½° male.

If you're mating a male flare fitting with flared tubing, it is always preferable to have the angles match. However, if your tubing is not hardened steel (such as stainless) it may conform to the new angle just enough to seal in some applications where the pressure is not excessive.

I apologize for the vagueness of that last paragraph, but I don't have any hard data to indicate where the line should be drawn here. People who have worked with specific materials in specific applications probably know how much they can bend the rules on those specific situations. Just be aware that not ALL flares are interchangeable in all sizes or all applications, so you may run into problems if you assume this works in ALL applications. It more than likely does not.

Is this what you are talking about,

http://www.parker.com/literature/Tube Fittings Division/4300 Catalog Cover.pdf


Triple lock swivel connection.

Higher pressure ratings and greater reliability are among the valuable advantages
of our enhanced Triple-Lok female connection design. It features a dual-angle
seat that accepts both 37° and 45° flare fittings – and repositions the sealing location away from the tip of the male nose. Compared with the previous
swivel design, the resulting benefits include:
■ Increased pressure ratings in most sizes (in fact, 72% higher than competitive product)
■ Sealing position that helps protect cone and nose, and improves connection reliability
■ Dual seat acceptance of 37° (all sizes) and 45° flare fittings (sizes 4, 5, 8, 10)
■ No difference in overall swivel nut or fitting body size, no change in torque or assembly metho

 

[Discount Hydraulic Hose]

The dual angle seat, yes. Among our lower pressure fittings (brass hose barbs and push-lock hose barbs, for example), some fittings are specified as dual seat and will accept a male 37 degree or 45 degree flare.

A couple of years ago, I got to look at the CAD drawings for some of our FJX (female JIC Swivel) hose fittings, and I noticed many of them actually had this dual angle seat.

It does allow these fittings to be used in other applications, but for tractor hydraulics JIC 37ｰ is the only flare you should need.

Unless, of course, you have equipment from Japan that uses JIS 30ｰ or Komatsu (metric JIS 30ｰ) fittings.