The 8274-4 planetary grinder is the only grinder on the market offering 3 HP at 115V while operating at a 230V level. With variable speed and a soft start to control it's amperage draw, the 8274-4 concrete grinder 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.
National's full set of metal bond removal diamonds, PCDs, and prep diamonds fit this 18" grinder.
| Width | 20" | 51 cm |
| Disk Size | 18.5" | 47 cm |
| Max. Height | 52" | 132 cm |
| Min. Height | 27.5" | 70 cm |
| Max. Length | 75" | 191 cm |
| Min. Length | 38.5" | 98 cm |
| Weight | 388 lb | 176 kg |
| Drum RPM | 133.8 | |
| Motor RPM | 400-2000 | |
| Motor Phase | Single* | |
| HP | 3 | 2.24 kW |
| Amps | 15 or 20 - controllr can switch between both settings | |
| Voltage | 115 | |
| Frequency | 60 Hz | |
Included with the 8274-4:
- 401882: Morflex couplers
- 9241: Quick-change magnetic-mount assembly: Three assemblies and three 73250 tooling holder mounting screws are required
- 73135: 5/32" Hex key
- 9245: Velcro Adapter - mounts onto the 9241 quick-change magnetic assembly for using polishing pads and brazed disks. Three adpaters are required.
- 6280-401B: 7/32 T-handle wrench
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.
