6" or 8" bench grinder for sharpening mower blades (and everthing else)?

Old 07-31-11, 03:31 PM
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6" or 8" bench grinder for sharpening mower blades (and everthing else)?

This may sound like a silly question, but here goes. I am tired of sharpening my mower blades with my angle grinder so I'm in the market for a bench grinder. My question is - will a 6" grinder be okay for this or would an 8" be better? More generally, is an 8" the better choice for other tasks?
Old 07-31-11, 04:00 PM
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I always used a bench grinder (when I had a mower)...as long as you don't overheat the metal..either size would work fine.
Old 07-31-11, 05:49 PM
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Either would work, but a bench grinder is much slower to use for sharpening blades. Bench grinders typically have induction motors that bog easily when you bear down on the blade for fast metal removal. Angle grinders have regular brushed motors with much more torque and can withstand the load better when you bear down on the blade. Some of the bigger-better bench grinders have much more power and they may be better suited to the task. They also have much more centrifugal force so that if they grab the blade, they can do so violently.
Old 08-01-11, 04:33 AM
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I've always used a 6" bench grinder for this and it works just fine for me.

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