The Stupid Fat Bloke allowed me to be talked into machining up an adaptor for him. Apparently it allows a different fuel pump to be fitted to a Land Rover diesel engine. No, nor me.
First, draw up a CAD model from the sketch provided. Some mods made, to avoid tool changes (change fillet to chamfer) and a larger drill (I actually drilled 3mm through in the end).
Then some toolpaths. Roughing, followed by a finish.
Here's some 3/4" (~19mm) mystery stainless. Possibly 303, 304 or 316, who knows.
It's actually the centre drilled hole that matters in terms of concentricity, so have another go, Fatty.
And off we go, finally:
Didn't come out too badly:
Done:
Part it off:
Over to the Bantam for drilling, as I don't yet have a turret mounted drill chuck for the Tree.
Finished. No great amount of deburring attempted, as I ran out of time at this point.
I didn't actually check any dimensions after running the program but at least the 5mm diameter was close to spec. The 6mm, 9mm and 15mm diameters were slightly under by about 120um but hopefully they aren't critical.
Also it wasn't possible to achieve the radius on the nose, due to the need for tailstock support at the thin end.
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