Should I buy a 6-inch or 8-inch bench grinder?

Across specialist communities like r/turning and r/handtools, the consensus is that 8-inch wheels run at a higher surface speed for the same RPM, remove material faster, and stay cooler with a lighter touch, which matters for sharpening hardened steel. A 6-inch unit like the WEN BG625V is cheaper, more compact, and plenty for reviving tools and general home-shop work. Choose 8-inch if you sharpen frequently or want to fit CBN wheels.