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Type: Posts; User: eKretz

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  1. You'll need a separate VFD if you want...

    You'll need a separate VFD if you want independent control of the spindle RPM; with a single unit the hydraulic pump RPM would change along with the spindle. To run multiple motors you need a VFD...
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    He's saying the lathe is worn out, not that he...

    He's saying the lathe is worn out, not that he got it fixed. It sure looks like a leadscrew pattern in the finish, very easy to get if the ways are worn .020"+ low and the top of the half-nut is...
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    Lee, by all means if you have a definite taker,...

    Lee, by all means if you have a definite taker, let him jump the line! Especially if he has one of its former shop-mates already. If the guy I know doesn't want to jump at it I'm not going to heckle...
  4. Surface grinder will work but it's not optimal in...

    Surface grinder will work but it's not optimal in terms of throughput. I'd look for a dedicated machine if she wants to make money. These were done for a buddy on a surface grinder with a silicon...
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    Wow, good for him! And you! :skep:

    Wow, good for him! And you! :skep:
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    I heard back from the guy I know that he's...

    I heard back from the guy I know that he's interested, but not any plans to come pick it up. I will get after him a little more. I think he doesn't have a trailer, so let's see. I would be willing to...
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    Conventional mill and get under it and you will...

    Conventional mill and get under it and you will be fine.
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    Do you own one of these? Lucky you if so. Thanks...

    Do you own one of these? Lucky you if so. Thanks for the scans.
  9. Thread: Measuring Radii

    by eKretz
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    She is measuring the start and end point of the...

    She is measuring the start and end point of the radius, not the actual radius itself. If the radius is perfectly formed that can work. If it's not then it won't be accurate. The same could be said...
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    Not necessarily. On very light work I'd say...

    Not necessarily. On very light work I'd say you're mostly correct. Once the work gets to a certain weight it will pull down differently as it rotates and the OD won't be round no matter the center....
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    I've done a deal with bob and have nothing but...

    I've done a deal with bob and have nothing but good things to say as well. He can be trusted.
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    Lee, I know a guy who might be interested, I will...

    Lee, I know a guy who might be interested, I will get back to you.
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    625 and 230 should be pretty damn similar in...

    625 and 230 should be pretty damn similar in terms of cutting, looking at the spec charts they have almost identical composition. There are some tricks for turning that might help too - though they...
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    Looked it up, I would guess pretty similar to...

    Looked it up, I would guess pretty similar to 625. Tough but not impossible. If you have a lot to do, maybe see about grabbing some CBN inserts, they generally work better than carbide on hard nickel...
  15. At least it sounds like you're in about the best...

    At least it sounds like you're in about the best possible position to deal with that then, heh. Let us know how hard the hit is...
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    What kind of machining? Turning? Milling?...

    What kind of machining? Turning? Milling? Drilling? You probably already know the basics. Slow way down and use light to medium feeds. Monitor tools closely for signs of dulling and don't try to...
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    You could make them pretty easily yourself. Just...

    You could make them pretty easily yourself. Just don't let the paper overlap. There are a few manufacturers that make these with a solid vitrified tip, or electroplated, etc.

    Superior Abrasives...
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    That is a very very nice old lathe. GLWTS.

    That is a very very nice old lathe. GLWTS.
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    I would say center lap also. Looks like the...

    I would say center lap also. Looks like the abrasive paper is placed on the steel center, then the steel sleeve is placed over it and the pins pull it tight when it's twisted to stop the abrasive...
  20. They will probably say "Hand me your wallet. Make...

    They will probably say "Hand me your wallet. Make sure it's full first." :D
  21. Got a surface or tool/cutter grinder? I'd spin...

    Got a surface or tool/cutter grinder? I'd spin grind 'em.
  22. Yep, inductive. Should read gear teeth just fine....

    Yep, inductive. Should read gear teeth just fine. Often easy to find under "proximity sensor."
  23. Post a picture. There are a few knockoffs or at...

    Post a picture. There are a few knockoffs or at least very similar heads but they are pretty good quality (Narex for instance).
  24. I'm with you. Currently I only have a readout on...

    I'm with you. Currently I only have a readout on the head of my grinder, but have two more scales and a readout waiting for install. I see a lot of comments regarding readouts being not that useful...
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    I could see it working just fine if the wheel was...

    I could see it working just fine if the wheel was just barely set above the table surface for finishing - and so long as the table surface was flat. Have you checked that? That information might...
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