Okay...Just about to order my double ended ram (from Station...Great guy btw) and I'm wondering what sized heim to tap the ram ends to...At first I was thinking a 3/4 male...That would leave 3/8ths of ram shaft around the heim....The heim would then go to a pair of Avalanche hy-steer arms on top of my cheby 60 knuckles...Then I got to lookin' at the shear strength (yet again) of the 3/4 compared to the 5/8ths...27K v.s. 47K lbs static...I'm thinkin' 5/8th's...That way the bolt would shear before the arm stuts would shear and/or (potentially) break the knuckle...Sorta' a easily replaceable fuse in the system...I'm thinkin' the 5/8ths are gonna' be fine considering the ram is puttin' out what? 5000lbs of force?

Whata' yal'l think?

-D

Somebody posted a chart on Grade 8 bolt strengths a lil while ago. A 5/8" gr8 bolt has a 27k pound shear rating. Your ram won't be putting out near that much power, i think. Well, a 2" bore has a piston surface area of (2*3.14=6.28) 6.28 square inches. Avg. sag. pump puts out 1000-1200 psi, if modded up to 1500 or more. So 1500*6.28=9420 lbs of force. I am just assuming that you have a 2" bore ram, and you will mod your pump for more pressure.

In any case, a 5/8" bolt will be fine, yeah...

Thanks man :beer: ...I thought so too...Again, when looking at all the 1" hardware on full hydro systems it got me second guessing again...

This list fin' rocks!

--D

my howe ram is tapped for 3/4 heim.

Originally posted by camo
my howe ram is tapped for 3/4 heim.

What's the OD of the shaft? The rams Sean sources are 1.5"...With 3/4 that leaves .375 around the shank of the heim.

--D