Surface Grinder table speed
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  1. #1
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    Default Surface Grinder table speed

    I have a Chevalier fsg-1224ad surface grinder with hydraulic table feed and automatic cross and downfeed.

    I have been grinding only some steel for now and it seems that when i take the last few 0.0004" passes and run it with high table speed, i get better surface finish.

    Im new to grinding and im asking for your help!

    How to determine the right table feed speed?

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    By sight and sound. You will know quickly if you have it wrong!

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    It all depends on the type of steel (or any material) and it’s heat treated condition, whether it’s possibly annealed for fully hardened will have a massive impact on how it grinds. Also your type of wheel you are using, the wheels surface condition and also the size of wheel will have a impact of surface speed of grinding.

    Your table feed will have a smaller effect on surface finish compared to many other factors described above.

    Factors such as spindle condition, use of coolant and depth of cuts will have a greater effect.

    The table fees is more of a feel rather then a definitive calculation,

    ** it may be more of numerical factor in more specialised modern grinding machines but nothing I’ve ever come across**

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  6. #4
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    Suburban tool has many good videos on grinding that should help you out.

    YouTube

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  8. #5
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    The sparks can sometimes tell when running dry..when they seem to become a solid bar you may be going too fast. Running wet a noticeable slowing of spindle RPM is a dead give away.
    A change in sparks pattern, getting close together or changing color indicates part getting hot and may soon suck up into the wheel and burn so a slow down or better yet a pause off part.
    Parts sliding to the left direction a good hint. Parts flying off the chuck too fast and too late.

    So sound and sparks are the basic premise of too much travel speed.

    Re:Parts flying off the chuck can often be avoided with a bump-stop high on the go-side of the taller part, a block of steel, an angle plate, a double clamped finger from a steel block.. If you can tip over a high part with a two finger push it may a tip-over and go flying set-up. If a bump-stop is not square it may not be touching the part high-up so not very good... so the bump-stop can be turned 180* so it might bump high, or a shim can be place high on the go side
    Last edited by michiganbuck; 06-09-2019 at 06:16 AM.


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