MADE TEST OUT OF IRONBARK, and hadda order a new drp y scale as i ran the apron hard agin the sops, need dro half blind, but getting specs tomorrow
got sick of slop in receiver and hitch, so welded 4mm plate then stuck it in the lathe and faced it down, but the welds on the hitch, which rates 2500kg are inadequate, the weld leg length is too short and the rhs is 4mm wall, so I'm going to machine a hitch from 55 square merchant grade steel IMO the hitch i have is poorly made
I could use 4140 with tensile 140000 ps inch but that's overkill and not stocked everywhere
Ill machine 2 AS it's same lathe time, sell one
I have not got a mill, but have a powerful magnetic drill for the hole
the sheer on a ball is about 32 tonnes, if they fail it is cos the machining of the thread part finishes with a nick , it should be a radius
this method no welds
MADE TEST OUT OF IRONBARK, and hadda order a new drp y scale as i ran the apron hard agin the sops, need dro half blind, but getting specs tomorrow
Why not machine a solid alloy stinger?
Plenty strong enough if you use the right alloy.
Option 2, although nowhere near as satisfying as making your own - buy one $88
Keep in mind anything you use needs to be plated for compliance.
try buying a lil piece, agree with you,or 6082 t6 or 6061 t6, i used to build alu yachts, finished now it need a mill or shaper, just the 16mm pin hole to-do now
i,ll stamp it myself i have the mill cert, , over 60 tonne in tensile, the stepped piece, the old hitch was 50x50 rhs welds inadequate leg length, throat to short throat to short ,light undercut, bet none of these fabricated hitches have certified welds
the receiver was not square 52+ and 51+ and tapered a ruff casting
finished, interference fit, tapped in with dumpy hammer, plenny grease, no movement at all, alu would have cut machine time by 75%
How about a photo Stuart?
Don.
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