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Thread: Scale Model Precision Grinding Vises

  1. #1
    old_toolmaker's Avatar
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    Scale Model Precision Grinding Vises

    This is my first attempt at posting on this site for over two months since I suffered a stroke and seizure back on 10-31-2018. I am slowly recovering and It sure feels good to be back on this site although I am not yet making chips out in the shop.

    I built this set of scale model precision grinding vises about 50+ years ago based on the well known Herman Schmidt vise. The larger vise is 2/3 scale and the smaller one is 1/2 scale. I have used them since they were built and they still serve me well today. They are precision ground to size and square to within .0002". Enjoy!!
    Attached Thumbnails Attached Thumbnails Scale Model Precision Grinding Vises-dick-vise-.jpg   Scale Model Precision Grinding Vises-dick-vise-b.jpg   Scale Model Precision Grinding Vises-dick-vise-c.jpg  
    Last edited by old_toolmaker; 12-28-2018 at 08:41 PM.
    Dick


    Links to some of my plans:

    http://www.homemadetools.net/forum/f...6068#post65876 OFF-SET TAILSTOCK CENTER PLANS
    http://www.homemadetools.net/forum/s...995#post112113 SMALL TURRET TOOL POST PLANS
    http://www.homemadetools.net/forum/l...994#post112111 LARGE TURRET TOOL POST PLANS
    http://www.homemadetools.net/forum/m...383#post110340 MINI-LATHE CARRIAGE LOCK PLANS
    http://www.homemadetools.net/forum/s...191#post106483 SMALL QC TOOL POST PLANS
    http://www.homemadetools.net/forum/q...849#post119345 QUICK CHANGE LATHE TURRET
    http://www.homemadetools.net/forum/m...949#post119893 MINI LATHE COMPOUND PIVOT MODIFICATION

  2. The Following 16 Users Say Thank You to old_toolmaker For This Useful Post:

    aphilipmarcou (12-31-2018), DIRTYJOHN (01-06-2019), high-side (12-31-2018), Jon (12-28-2018), Metallurg33 (01-01-2019), mwmkravchenko (12-31-2018), Paul Jones (01-01-2019), PJs (01-02-2019), primy (01-07-2019), rendoman (01-01-2019), rossbotics (01-02-2019), Seedtick (12-31-2018), steamingbill (12-31-2018), threesixesinarow (12-28-2018), Tonyg (01-02-2019), Tule (01-01-2019)

  3. #2

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    steamingbill's Tools
    Hey Old_Toolmaker,

    They look very decent.

    Am puzzled about you folk that own surface grinders - do you make the parts to within plus 0.005" on the mill and the lathe and then transfer the job to the surface grinder to bring in the final surfaces to 0.0002" ?

    Or is it possible to carve things on the grinder from scratch ? ie Do you start off with a roughing wheel to get a block to +0.005" and then change to a fine wheel to finish ?

    Any good web sites or books or youtube videos you can recommend to someone who knows nothing about surface grinders ?


    ........ and Happy New Year to you ..... keep on recovering .....

    Bill

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    Beautiful work Dick. Hope you can spend more time in the shop, it will speed up your recovery too.

  5. The Following 2 Users Say Thank You to aphilipmarcou For This Useful Post:

    old_toolmaker (12-31-2018), PJs (01-02-2019)

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    mwmkravchenko's Avatar
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    Wishing you a speedy recovery Dick. Like the grinding vises. Well made and very well finished.

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    old_toolmaker (12-31-2018), PJs (01-02-2019)

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    wizard69's Tools
    Very nice work Dick! Beautiful really.

    I have a question though, is there any wisdom in trying to make these out of 4340 HT? I have a round bar of this material but to be honest it is a challenge to machine. I’ve made a few small parts out of it and let’s put it this way, it is unforgiving when it comes to feed and speed mistakes. The other option is to buy some 4140 or similar material, the bar however only cost a few bucks.

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    ncollar's Avatar
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    Dick
    Thanks for sharing with us that you are on the mending side.
    A speedy recovery and a Healthy and Happy New Year.
    Nelson

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    high-side's Avatar
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    Quote Originally Posted by steamingbill View Post
    Hey Old_Toolmaker,

    They look very decent.

    Am puzzled about you folk that own surface grinders - do you make the parts to within plus 0.005" on the mill and the lathe and then transfer the job to the surface grinder to bring in the final surfaces to 0.0002" ?

    Or is it possible to carve things on the grinder from scratch ? ie Do you start off with a roughing wheel to get a block to +0.005" and then change to a fine wheel to finish ?

    Any good web sites or books or youtube videos you can recommend to someone who knows nothing about surface grinders ?


    ........ and Happy New Year to you ..... keep on recovering .....

    Bill
    Bill,
    Generally, you make your parts on your mill or lathe, and leave it oversize by several thousandths. Transfer your work to the grinder and bring it down to your final size.
    Pat

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    steamingbill (01-02-2019)

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    ncollar's Avatar
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    Dick
    Thanks for sharing with us that you are on the mending side.
    A speedy recovery and a Healthy and Happy New Year.
    Nelson

  15. The Following 2 Users Say Thank You to ncollar For This Useful Post:

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  16. #9
    ncollar's Avatar
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    Quote Originally Posted by steamingbill View Post
    Hey Old_Toolmaker,

    They look very decent.

    Am puzzled about you folk that own surface grinders - do you make the parts to within plus 0.005" on the mill and the lathe and then transfer the job to the surface grinder to bring in the final surfaces to 0.0002" ?

    Or is it possible to carve things on the grinder from scratch ? ie Do you start off with a roughing wheel to get a block to +0.005" and then change to a fine wheel to finish ?

    Any good web sites or books or youtube videos you can recommend to someone who knows nothing about surface grinders ?


    ........ and Happy New Year to you ..... keep on recovering .....

    Bill
    Bill
    Everything's made to an oversize state for more than one reason. A tool like the vises Dick created I am sure he heat treated it and then went to the grinder. The grinder takes off thousands to get it accurate and square. Grinding is the finishing step in tool making.
    Nelson

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    steamingbill (01-02-2019)

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    old_toolmaker's Avatar
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    steamingbill,

    When tool building and I intend to precision grind, I will normally mill oversize and leave .005" grinding stock per side for finishing to size. It is possible to plunge grind from the solid and I have done that also on ocassion, but for larger flat surfaces it is usually not practical to do so. I will usually use a 46 grit H hardness 7" diameter x 1/2" x 1-1/4" I.D. aluminum oxide wheel for most things.
    Thank you for asking.
    Dick


    Links to some of my plans:

    http://www.homemadetools.net/forum/f...6068#post65876 OFF-SET TAILSTOCK CENTER PLANS
    http://www.homemadetools.net/forum/s...995#post112113 SMALL TURRET TOOL POST PLANS
    http://www.homemadetools.net/forum/l...994#post112111 LARGE TURRET TOOL POST PLANS
    http://www.homemadetools.net/forum/m...383#post110340 MINI-LATHE CARRIAGE LOCK PLANS
    http://www.homemadetools.net/forum/s...191#post106483 SMALL QC TOOL POST PLANS
    http://www.homemadetools.net/forum/q...849#post119345 QUICK CHANGE LATHE TURRET
    http://www.homemadetools.net/forum/m...949#post119893 MINI LATHE COMPOUND PIVOT MODIFICATION

  19. The Following 2 Users Say Thank You to old_toolmaker For This Useful Post:

    PJs (01-02-2019), steamingbill (01-02-2019)

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