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  • andy_b
    replied
    Sprocket,

    that grinder is beautiful!!!!

    andy b.

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  • Guest's Avatar
    Guest replied
    TOM CPM10V is absolutely correct in suggesting a router and a Bosch. I bought one of their POF45's to do a small job and read the accompanying blurb. Originally, the machine was a toolpost grinder and not the other way around.

    Again, Chaddock's Quorn T&C is part of my workshop. The Magneto bearings will stand re-sharpening small dies and making 1/10th dia end mills. I can't see the damned things but Chaddock did.

    For those who feel like making something dedicated to their lathe, the New Zealander Jack A Radford and the Brit, Ian Bradley have published designs.

    It is interesting and pertinent to mention that this information has been published- almost verbatim- in recent posts.
    Little wonder that some of us attempt to liven the dead.

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  • dp
    replied
    That's a beautiful thing, Sprocket. I'd buy the how-to CD!

    dp

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  • Guest's Avatar
    Guest replied
    Sorry This was an End Mill Grinder, pain meds for my hand make me a little cloudy this time of day.

    +++++++++++++++++++++++++++++++++++++
    I was wondering about the cheap end mill grinder that KITTS Tools sells, it's like $150. Is it junk or just something new the chinese are putting on the market.


    Jerry

    [This message has been edited by jfsmith (edited 04-26-2005).]

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  • Guest's Avatar
    Guest replied
    Great Job Sprocket!

    That's a class A paint job too..

    Adrian

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  • smurph
    replied
    Nice job Sprocket!

    What issue of HSM were those plans in? Err... A quick search reveals Jan/Feb and Mar/Apr of 1999. Bummer, that is why I don't have those issues! Way before my time. Oh well...

    ------------------
    That's my story and I'm sticking to it...

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  • Sprocket
    replied
    When this topic came up, I was in the middle of building one from the plans in HSM (D.Johnson I think). I have finished it, and this weekend it got warm enough to paint. Wish I could remember how to put in thumbnails, but here are links to pictures:
    The first group should be parts.
    http://img.photobucket.com/albums/09...t/DSCN0941.jpg
    http://img.photobucket.com/albums/09...t/DSCN0943.jpg
    http://img.photobucket.com/albums/09...t/DSCN0942.jpg
    http://img.photobucket.com/albums/09...t/DSCN0936.jpg
    The next are trial fit, everything together
    http://img.photobucket.com/albums/09...t/DSCN0934.jpg
    http://img.photobucket.com/albums/09...t/DSCN0931.jpg
    And finally, finished and painted.
    http://img.photobucket.com/albums/09...t/DSCN0949.jpg
    http://img.photobucket.com/albums/09...t/DSCN0951.jpg
    http://img.photobucket.com/albums/09...t/DSCN0949.jpg

    The frame is cast iron, the spindle is 1144 Stressproof, the guards are bent up from 1/8" and 12 gauge steel,and welded.The motor mount is 1/4" steel. This is a change from the original plans in which the frame and motor mount were aluminum. Power is a Porter Cable laminate trimmer. Looking back, I ordered materials the end of January, so it's been a relatively short project. All together, a fun, and I hope, useful project.

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  • Tom CPM10V
    replied
    Daarp, I don't have the capability to create or transmit electronic images. BUT, if you will give me a mailing address, I'll shoot some color prints and mail them to you via the USPS. Perhaps you could post them on this site, or better yet, post pix of your new/improved holder/bracket when you get it operational. Tom [[email protected] 717-642-8160]

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  • Darrp
    replied
    Tom is there any chance you could post a pic of the "router turned grinder"? It sounds like something I want to do. Sorry for the hijack Jim.

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  • Tom CPM10V
    replied
    I've been using a router motor for internal grinding. I made a sturdy tool post bracket from 2" thick aluminum to grip a new Bosch router motor around its 'barrel' much like Bosch's router base grips the motor. To slow things down a bit, I use one of those cheap speed controls ... that probably brings the speed down from 25,000 to around 10,000.
    I think it is important to use a router with [1] good/new bearings and [2] a long collet to better grip the tool shank.

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  • J Tiers
    replied
    I looked at the Little Machine Shop ones, and I thought they were the clunkiest items I had ever seen.

    I doubt they would clear the tailstock. I definitely would advise some caution considering those.

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  • JimA
    replied
    Bob I have looked at those tool post grinders at little machine shop. If I built one the only cost I will have is in the bearings. I know those are imports and then not real sure of the quality. I have all the material I need for the housing and the shaft and lynnl reminded me that I have a Makita trim router back on the shelf somewhere that I haven't used for a long time. I like the Dumore concept and will build a tube that contains the bearings and shaft. I'll splice another tube that this will slide into and clampdown that's fastened to a housing that goes to my tool post. If a sewing machine or small fan motor will not do what I need it to then I'll use the laminate trimmer for the motor. I am really leery of buying stuff off of eBay, yet if I can't score one of those tool post renders for less than a hundred bucks I would be very tempted.

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  • precisionworks
    replied
    There are LOTS of Dumore's on eBay. Their most popular model is the 57, but they also sell the 12, 25, 44 & there are lots of older models too. Friend bought a complete 57 external with box, manual, good condition for $250.

    ------------------
    Barry Milton

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  • Endmill
    replied
    Check Little Machine Shop. He has two imports that look usable, and supposedly work well that are affordable. I decided that this was simpler than going from scratch, and if necessary, one could upgrade the bearings.
    Bob

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  • Pete Burne
    replied
    I mounted my Makita electric die grinder to a flat plate that goes on my lathe compound.

    It did the job for my at a fraction of the cost of a purpose build grinder. A lot depends what your tolerances (and wallet) are.

    Pete

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