National 8274-4 National Planetary Grinder & Polisher

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