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Type: Posts; User: eKretz

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  1. Replies
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    Unless the total deflection due to the weight of...

    Unless the total deflection due to the weight of the machine and steel plate is excessive in terms of sheer amount of sag (did we ever learn what size joists are under the floor?) I would ignore it...
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    If it is for adhesion purposes and there is...

    If it is for adhesion purposes and there is access to a CNC mill, I'd run a thread mill around the hole in effect making a shallow spiral groove and leaving a core of untouched original finish to...
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    I don't think it's so much the machine tool as it...

    I don't think it's so much the machine tool as it is the fixturing. Between that and always having the fixturing set up and ready to go, a regular machine tool just can't compete on setup time alone....
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    2,310

    Obviously the HBM is one of the kings of the...

    Obviously the HBM is one of the kings of the machine world. The only problem is they take up a lot of space - vertically also. Not everybody has the space for such a machine. I have a Wells 847 and...
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    3,765

    It does not need to always be centered. I have...

    It does not need to always be centered. I have run bars above center more times than I can count. On heavier cuts, setting a longer bar on center actually will result in the tool tip running below...
  6. There are a lot of guys here who are also members...

    There are a lot of guys here who are also members there, but you might want to post this at the EEV blog forum, there are more electronics guys over there.
  7. The other consideration of note when spinning up...

    The other consideration of note when spinning up a lathe chuck to higher RPM is whether the chuck jaws are gripping on a rough diameter or a round and on center dimeter. If the diameter is rough and...
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    Silver plated baffles in the coolant tank? :D

    Silver plated baffles in the coolant tank? :D
  9. Yes, but nobody does that. Well, nobody who isn't...

    Yes, but nobody does that. Well, nobody who isn't mentally incompetent...or who doesn't have old iron disease...:D
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    Get the speed cranked right up like Rob said....

    Get the speed cranked right up like Rob said. That right there's your problem. After you do that run just a trickle of coolant right at the tip of the cutting tool to prevent the work getting marred...
  11. Something like that will be a pain. My first try...

    Something like that will be a pain. My first try would probably be having her bring them regularly BEFORE they are too dull and rather than have to do remedial sharpening, keep them sharp with some...
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    Yes, mostly. Part moved to and fro with the...

    Yes, mostly. Part moved to and fro with the table, bar stayed still, far end attached to post bolted to floor and the near end to the head on the rail. Raising the head on the planer raised that end...
  13. I remember the first time this happened to me...

    I remember the first time this happened to me with a 10" scroll 6-jaw. I was finishing a 1/2" diameter at somewhere north of 1000 rpm and when I tried to take the finish cut the workpiece pushed back...
  14. Let's sum it up. Maybe that will help the young...

    Let's sum it up. Maybe that will help the young fella to understand where everyone here is coming from.

    If you are doing large work, run a large chuck and run it slowly - the work requires this...
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    Yep, if set parallel to the tapered bore edge,...

    Yep, if set parallel to the tapered bore edge, the key will be deeper at the small end, not the large end. And I bet it was fun fuzzing a smidge out. Good times. The long keyways on the planer were...
  16. Replies
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    1,068

    Ah that's a baby keyway. :D Wish I had some...

    Ah that's a baby keyway. :D Wish I had some photos of the ones I used to cut on the planer. And yes they were internal. About 4" wide and probably 8+ feet long. Probably not too many guys here will...
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    1,066

    We ran a few without altering Q&T HT - they wear...

    We ran a few without altering Q&T HT - they wear out. If you don't want to mess with torching them, make sure they are a good snug fit to start and they will last years of daily use before loosening...
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    I'm gonna say you're going to be screwed also....

    I'm gonna say you're going to be screwed also. Time to take it apart so you can either make a new part or get that piece to a real machine tool so the broken piece can be machined out. Welding will...
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    I've made a few of these for pretty good sized...

    I've made a few of these for pretty good sized machines from 4140 Q&T and torch heat treated the business end with damn good results. Quenched in oil and tempered to medium straw to brown. They all...
  20. Nope. You are not alone.

    Nope. You are not alone.
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    Sure but would you trust those to hold a .0002"...

    Sure but would you trust those to hold a .0002" tolerance? I wouldn't. 50% isn't great either.
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    I don't think he's claiming accuracy, only...

    I don't think he's claiming accuracy, only precision. Still, precision of .0002" easily with a caliper is a far-fetched claim if you ask me. And probably most everyone else.
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    You have some magic calipers if you can reliably...

    You have some magic calipers if you can reliably spot the difference between .1004" and .1006" gage blocks with calipers. Between .104" and .106" sure. Not so much on the tenths. Not to mention...
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    Greasy old used hone stones should probably be...

    Greasy old used hone stones should probably be more like 80-90% off list I'd think. He ought to just post all his stuff in pictures at least.

    Edit: N/M - just saw the rest of the posts.
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    Right? I'd buy one. That line borer is sweet.

    Right? I'd buy one. That line borer is sweet.
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