grind plane iron with spindle sander? - Woodworking Talk - Woodworkers Forum
 
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post #1 of 3 Old 02-04-2016, 04:58 PM Thread Starter
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grind plane iron with spindle sander?

I've searched the forums, and the internet, to see if anyone has tried to grind a plane iron with a spindle sander. Got some results about people using a belt sander, but nothing about an oscillating spindle sander.
I see maybe a couple advantages of a spindle sander over a belt sander:

a) easy to get a straight edge by just holding the side of the iron against the table, and the spindle should give a straight edge at 90 deg to the side of the iron

b) small radius spindle should (perhaps) give a nice hollow ground edge

c) hopefully should not generate too much heat


Has anyone tried this?
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post #2 of 3 Old 02-04-2016, 06:56 PM
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I can see a few problems there. For one, the spindles I've seen are generally small diameter, which means not much surface area, which in turn leads to faster heat buildup, and that's never a good thing. For two, you're gonna have a hard time managing to keep the blade edge parallel to the spindle without accidentally messing up the grind. For three, spindle sanders are woodworking tools, and turn much, much slower then a metal grinder would, 452 feet per minute on an average sized spindle vs 4000 feet per minute on a belt grinder. The speed difference means its going to take a lot longer to do any work, and will also build up heat a lot more. The forth problem I can see is that most spindle sleeves I've seen are aluminium oxide paper, which is great for wood but lasts about half a second when used on metal.

The fifth issue I can see is having a hollow grind, but people seem to like those for some reason

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post #3 of 3 Old 02-04-2016, 10:18 PM
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The spindle sleaves are intended to sand wood. I think you would go through so many sleaves trying to grind steel a grinder would be cheaper.
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belt sander, grind, plane iron, spindle sander

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