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| Joe d:
Well, finished up various tooling side-tracks, and got back to the main event. Spent a bit of time to make up a boring bar to line-bore the cylinders: and a driving dog and damned near ruined a cylinder assembly as the part shifted during boring... came out with a bore slanting off to the side...I'd bolted a bit of angle to the cross slide, and bolted the cylinder to that, and it was not up to the job. :hammer: soooooo after a longish pause for recriminations and practising bad words, went back to the 4 jaw, indicated the thing to pretty much zero runout and finished the job that way. Fixing the boo-boo has left me with a bore that is .0025 bigger than the plans call out, I'll adjust the piston size to fit. Once the bore was done, bolted on the head without moving the cylinder and bored the head for the piston rod bushing Installed the bushing, and the head cover and reamed them to final dimension Then turned it around in the chuck, re-indicated as close to dead nuts as I could, and did the 2nd head the same way, and then all over again for the second cylinder assembly And here's the stack-up: This one got me worried for a little while! Cheers, Joe |
| Bernd:
Nice save Joe. :thumbup: To bad that line boring didn't work out for you. Looks like your streching the limits of the Taig there. Bernd |
| Joe d:
Thanks. Bernd. There have been a few moments that I'm right on the edge of Taig's envelope ..Moving along... time for pistons & rings Chucked up a piece of cast iron, turned it to the required diameter, bored to the required ID, and here I'm about to start parting them off and here's a pile of rings (I need 4, so I should be good even after breaking some in the installation) The pistons are held on their rods with two set screws at 90* so I turned them oversized, drilled and tapped for the set screws, and then mounted them on the piston rods to act as an arbor to turn to final size and cut the grooves for the rings And here you need your x-ray vision to see the all where they belong inside the cylinder. (It's all in there. Trust me.) Cheers, Joe |
| Brass_Machine:
Looks nice Joe. You make it seem like it is easy stuff. Good job! Eric |
| Rob.Wilson:
Hi Joe Great work :jaw: :bow: :bow: :bow: Regards Rob |
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