The 8274-4 planetary grinder is the only grinder on the market offering 3 HP at 115V whil operating at a 230V level. 

With variable speed and a soft start to control it's amperage draw, the 8274-4 adjusts to the needs of small or large jobs.  This machine is well suited for removal of thin-set, coatings, adhesive, prepping concrete for overlays or coatings, and polishing.

Width: 20"

Disk Size: 18.5"

Max Height: 52"

Min Height: 27.5"

Max Length: 75"

Min Length: 38.5"

Weight: 388 lb

Drum RPM: 133.8

Motor RPM: 400-2000

Motor Phase: Single

HP: 3

Amps: 15 or 20 - controller can switch between both settings

Voltage: 115

Frequency: 60 Hz


8274-4 Grinder Service Manual

8274-4 Grinder Operating Manual

National Flooring Equipment stands behind its products with a one-year warranty. We will replace or repair any product or part necessary at our Minneapolis, MN facility or at a National-designated certified warranty location. Our warranty includes the cost of freight expenses on qualified repair.