Bonehead move and being lazy question

Yes, thank you! I spent about 45 mins tramming in the head in both axis, checking quill runout, checking some collet runout this morning after the felt was installed. Total quill run out is around 0.0007+ (call it 0.001 if you wish), which I can certainly live with. collets were running about 0.0015+ runout, again, I can live with that (for the type of work that I do). Now, I just need to install the power feed travel limit bar, and the old girl is about ready to make some chips. :cool:
Try putting a very thin coat of high spot blue on a R8 arbor and mark up the spindle nose with it. It will bring out any burrs or other damage to the spindle nose. Then dress just the issues. Do not touch any part of the surface that does not need it. Also check the fit of the collets to the anti rotation screw. If it is too tight of a fit in the collet slots it will cause runout. Also, while you have an indicator on it, check for movement in the bearings by pushing the spindle lightly side to side.
 
Thanks Bob. I'll fine tune things if I can, but honestly, 95% of what I machine is for Hit-n-Miss engines, and older (1950 or older) engines and machinery. Most of the tolerances I am working with are in the +/- 0.002-0.003 range, so this old girl should be plenty good. However, if there are some things I can do to dial it in a wee bit better, I am all for it. I cannot tell you the number of things I have built up with weld or braze, and then machined it back to original specs. And, as I have posted elsewhere, silver solder in my best friend when working with broken cast iron!

Interesting enough, I am mentoring a young man who is going to school to become a machinist/industrial type engineer. I have 2 challenges with him. #1 is getting him to match the effort to the required tolerances. He wants to keep a 0.0001 tolerance on something that will be very good with 0.001 Now, there is something to be said about being able to hold a tolerance that close, but the "return on labor" investment ratio doesn't always add up. Bragging rights are one thing, parts delivered per hour of effort is another. The other challenge I have is helping him "think outside the box" when setting up a piece of work. He has already surpassed my capabilities machining things. However, he has a way to go with setup and work holding, and most importantly, order of operation. He is progressing well though, and while I am not a journeyman, I have done fairly well making parts for old engines that are "unobtainium". So far, nothing has been returned to me because it failed or did not work. I hope I can continue that streak...............

Bottom line, if I can nurse this thing to be a wee bit better, I will certainly invest the time. At this juncture, she will deliver 95% of what I usually do.
 
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