How Much Bending will good hose take?

[Grrrr]

Sorry Reg, I don't know how to do the quotes or I would. But, you wrote:
"It would normally be expressed as a multiple of the hose diameter, e.g. mininum bend radius = 7 times hose diameter."
Last post you wrote:
"I didn't say it has anything to do with diameter."
"What I did say is that it is normally spec'd as a multiplier of it's diameter."
??????????????????

If it doesn't have anything to do with diameter, then how can it normally be spec'd as a multiplier of it's diameter?

I understood exactly what you wrote, which is tragically incorrect. I've been working with hoses 22 years and have never seen any hose bend radius expressed as a multiple of it's diameter. It sounds like you made an educated guess at the correct answer which does sounds logical, but it is not correct.

My point is, I would hate to see some poor guy spend his hard earned money on a hose only to receive bad info and have the hose ruined and have to buy another.

Please don't be offended as I was not taking a shot at you, just trying to steer the gentleman that needed the info in the right direction. Sometimes people think I am being a jerk because I tell it like it is. If that is being a jerk, then I am guilty.

I do not think you were being a jerk at all. I have to agree with you that it is all to do with how the hose was made. I have some thin hose that you think would be easy to bend and it is like a rod and some very bendy thick stuff.

 

[Reg]

OK, so maybe I should have said, "read the spec and application notes".
For just about everything "flexible" that I have ever had to spec, e.g. cable, tubing, fiber optic, minimum bend radius has been listed as some number TIMES the diameter.

So, if you know what type of hose you have - look it up.

The specs are reproduced by many of the hose manufacturers and vendors. Example; for SAE hydraulic hoses.
http://www.hydraulicsupermarket.com/upload/db_documents_doc_20.pdf

 

[Wayne County Hose]

Don't believe everything that guy says. He claims to know way more than he does. Proof, follow this link:

Eaton Product Literature Library > Fluid Conveyance > Weatherhead

Go to page 58 and look at the bend radius for H430. H430 is a 100R12 hose, but depending on which hose you specify, it can have the normal 100R12 bend radius or 1/2 the normal bend radius. But it's all 100R12? Bottom line, contact the manufacturer.

By the way, that is the link for the Weatherhead online hose and fitting catalog. There is also a lot of great technical info in there. Definately worth downloading and printing. If you keep following the page down past the catalog section to the literature section, there's some fantastic reading for you guys looking to solve many of your hydraulic issues.

I got some good info from that guys website, but he is awfully arrogant and is the self proclaimed "king of internet hydraulics." He should really double check his facts before posting. Anybody can read from a catalog or technical manual, type it onto a web page, and sound like an expert.

 

[hill]

Bending the mount plate downward did solve my problem as I thought above - working the loader through moving ten yards of wood chips never resulted in a bend more severe than about an eight inch diameter. Still, it'll be useful to me in future to know that there IS a bendability specification for hydraulic hose.

I take it that the bendability of any given hose type is not coded within the alpha/numeric sequence markings that most hose bears? And that manufacturer sites or catalogs are the places to find such info?

Thanks for the photo posting info, Grrr (I feel like I know you. Both my wife and kids complain that I grunt or growl more than I talk )