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| raynerd:
OK, well all your advice taken onboard and all sound ideas which make sense! So here we go boring the standard with new clamps. DMIOM - didn`t get your message in time and they were not anchored in this setup so your advice is duly noted for next time! Still no camera, so just a couple taken on my phone. boring the standard: After testing the bore with my go/no-go gage the bore is an excellent fit for the guides. Considering this truthfully is my first time making an accurate bore so small - I`m pleased :ddb: Then as Kwackers suggested, turned up some silver steel that was already 16mm down to a very tight fit. Rubbed it down to a taper with some emory paper and pushed on the standard. I then skimmed up the feet which as it happened were almost true to the bore anyway, ...a pile of parts...again ....but now the standard should be correct!! OK, now I would like to drill the feet of the standard and tap the holes to bolt it down to the soleplate; equally I`d like to drill the holes for the soleplate to the box base. I`ve got my BA tap set :ddb: but I`m not sure the best way of getting these to match up. I`m thinking I could make a jig or just mark out and drill ? Any thoughts or suggestions...? |
| NickG:
I was going to say the straps looked alright but I think the advice from the others was correct when thought about more carefully! Good work there, for drilling the holes, sure you could do it with careful marking but spot the holes properly - i did some the other day that weren't as critical and the drills wondered off a little even though I'd made deep centre pops! I little jig would probably be a better way ( a sort of template) then you'll get them all the same, just remember to use it the right way up each part. What speed did you bore at? I thought cast iron should be pretty slow but whatever, it's worked well. :thumbup: :clap: Nick |
| kwackers:
Don't know if it's the camera - but it does look mightily fast for cast iron! Re the holes, milling machine. Use the dials (or DRO) to position them. All that matters here is that they're spaced out the same so they all match. |
| raynerd:
I don`t know what speed it was as I`ve currently no tacho (winter PIC project) and have converted the motor to 3 phase with inveter and vary control. I took the first passes very slow as suggested in both the ME article and the 10V book. However once I could "feel" the top layer had been cut, I jumped up the speed a bit. The photo is posed - :) I`d already cut the bore!! :lol: I think I`ll go for a jig and then I know they are all the same, especially without my DRO on the mill at present. |
| NickG:
Ha, :D I've done that myself a few times! Yeah, I would say a couple of hundred RPM would be about right for boring that. Saying that, I do everything slower on my lathe as it's good at doing slow! Nick |
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