Description
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.
Included with 8274-4
9241: Quick Change Tool Holder Assembly (3)
9245: Velcro Plate Adapter (3)
9292: Floating Isolator (3)
8274-45: Rubber Dust Guard
6280-401B: 7/32 T-handle Allen Wrench
6254: 50 foot 12 gauge Extension Cord
1009: Safety Glasses
Instruction Manual
Pads
Click to add:
5 Inch Polishing Pads
5 Inch Brazed Diamonds
Trapezoid Diamonds
Metal Bond Diamonds
PCDs and Carbides
Specifications
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
Safety
- Dual rear vacuum ports
- Removable handle & weights for easy transport
- Three-part adjustable angle handle
Performance
- Choose from 15A or 20A circuit-breaker settings with a convenient switch on the side of the controller; the 15A selection limits motor draw to 15 amps; the 20A selection pulls up to 20 amps
- Forward and reverse directional controls increase tooling productivity with cleaner consumables and more even wear
- Variable speed control
- Flip-style weights for added or decreased head pressure
- 18-inch grinding path; uses National’s patented self-tensioning, single-belt design to prepare concrete surfaces to a 3000-resin shine
- Adjustable velcro dust guard lets the machine operate within an eight of an inch of walls & promotes nearly dustless operation
- Grinder head rotates 90 degrees for easy tooling change access; Morflex couplers, polishing undulating concrete surfaces or creating a uniform scratch pattern for coating applications; operates a complete dry grind and polish system to eliminate messy and hazardous slurry






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