Reply by jimintx

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Posted on Disc Sander Runout

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929 posts in 2143 days

#1 posted 03-18-2017 03:58 PM

Check the runout without any paper installed to see if the plate is true. Depending on how it is attached, you may be able to rotate it on the shaft and lock it down in a position that cancels out the 0.02 runout.

There always will be some given the paper, but for your use I d try to eliminate it all.

If the plate is aluminum, you could use a straight piece of steel with a wrap of 100 grit silicon carbide paper and hone it flat with the disc running. 0.02 is not much, but definitely in the annoying range.

- splintergroup

I agree with this, and now need to check the condition on my stationary disc, which is only a 9-inch version. I never thought of checking that, but haven’t yet used it for precision fitting work.

Check the obvious things as mentioned so far here, and then, for a tiny amount like you have, I would not worry about honing the disc true. I find that most machines and tools need some type of tuning, when new and from time to time later. (I find it somewhat offensive that a new plane needs to be tuned, for example).

-- Jim, Houston, TX

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