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Type: Posts; User: eKretz

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  1. Replies
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    Yeah, shimming some parts on the grinder is...

    Yeah, shimming some parts on the grinder is necessary to get them flat, just like on any other machine tool. Grinding has much less tool pressure but it's still there also. Another way that works is...
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    816

    I think this would depend on the size and mass of...

    I think this would depend on the size and mass of the parts. Something heavy is not likely to float up. Little lightweight parts probably will. This is with respect to nonmagnetic parts. Any parts...
  3. Good luck boring tenths out and hitting that...

    Good luck boring tenths out and hitting that 16μin finish ..
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    587

    Most people don't even pay attention to this and...

    Most people don't even pay attention to this and just order off the shelf stuff and assume that's all you can get. If you actually call and ask, the manufacturers will give you whatever they have...
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    587

    Cutting tough materials like AR plate, tool life...

    Cutting tough materials like AR plate, tool life often comes down to edge prep more than anything. It is critical for abrasive type materials. I have cut plenty of AR400 and AR500 with SEKN milling...
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    6,539

    For a long time things have been stagnant. I am...

    For a long time things have been stagnant. I am guessing they are going to start climbing as we run out of experienced people. Either that or everybody will buy robots.
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    I don't work full time anymore due to medical...

    I don't work full time anymore due to medical problems, but I do part-time stuff for a buddy's shop (mostly little work or teaching/supervising the other guys or estimating) a couple half-days a...
  8. The Sunnen P28 type hones are effectively line...

    The Sunnen P28 type hones are effectively line hones - I agree, definitely the way to go here. The slight over sized area shouldn't be cut any larger by the hone as long as the bores are in line....
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    Like I mentioned, and Buck as well: it comes down...

    Like I mentioned, and Buck as well: it comes down to what exactly we are talking about. If he's running a South Bend lathe and trying to center drill the end of a shaft running at 20 RPM and will...
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    1. 50% off msrp (this is what the earlier ad...

    1. 50% off msrp (this is what the earlier ad said) isn't that great for secondhand endmills (doesn't matter if you say they're unused - we've all been burned by that one before, and a picture really...
  11. Grinding would be a giant pain in the ass. Just...

    Grinding would be a giant pain in the ass. Just trying to get everything set so that it would clean up with that little material to be removed would be a bitch. Honing is definitely the better...
  12. Yep, line hone.

    Yep, line hone.
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    Costing you more money! Also unnecessary on a...

    Costing you more money! Also unnecessary on a manual machine. The high angle isn't necessarily as high as you assume, there are different edge prepa for different materials, the same as all the newer...
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    You might want to look into an SEKN or similar if...

    You might want to look into an SEKN or similar if you're doing a lot of heavy material removal. I've always found them to be about the best roughing insert there is. The high lead angle means you can...
  15. A lot of the videos on Youtube seem to be of...

    A lot of the videos on Youtube seem to be of trains running with leaky exhausts or missing mufflers but this one gives a pretty good representation of what they should sound like I think.
    ...
  16. Every one I've worked on has been a close slip...

    Every one I've worked on has been a close slip fit. At that size I'd probably shoot for whichever tolerance level gets you to .0005"-.001" clearance.
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    Well, let's hear what exactly he plans to do...

    Well, let's hear what exactly he plans to do first. Next, are you the owner of that tooling or just a fellow employee or supervisor?

    And I have broken probably a pretty hefty pile of tooling as an...
  18. Rensselaer is about 30 minutes from me. Never...

    Rensselaer is about 30 minutes from me. Never knew they made miniature trains there back when; pretty cool.
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    Same here. And in addition I take a small block...

    Same here. And in addition I take a small block of aluminum or steel and "clamp" it between the top compound slide and the bottom of the compound at the rear so that it's positively locked in place....
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    A tip for improving your centers, though it may...

    A tip for improving your centers, though it may or may not help you in this particular situation: in a shop I worked in previously I used to do a bit of OD grinding work and I found that for getting...
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    Yeah this is a complicated subject without just...

    Yeah this is a complicated subject without just one simple answer. To find out the true cause you'd need to check a lot of the geometry of the machine. Generally if you have a bed wear problem you...
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    Coolant is your friend, no two ways about it....

    Coolant is your friend, no two ways about it. Especially so when you don't have a helping hand from a magnet. It's slow going without coolant. Cutting your cross feed and using even a spray bottle...
  23. I take it the belt is for longitudinal table...

    I take it the belt is for longitudinal table travel? I said a few choice words when reinstalling the one on my MicroMaster for the first time that serves the same function. They definitely have some...
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    Did you ever do the OD test cut without the...

    Did you ever do the OD test cut without the tailstock? I am with Jim on this one. Before delving in to all the almost limitless possibilities, begin at the beginning. A light finish cut should have...
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    In the places I've worked, foremen don't make...

    In the places I've worked, foremen don't make decisions like that. They might advise one way or another, but that's a big league decision. Akin to Supe or VP level. And yes, learning to get around...
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