With enough power to handle large and small jobs, the 8274-4 is the only grinder on the market offering 3 HP in a 115-volt grinder that operates at a 230-volt level. Easy to operate control box offers variable speed to help control the amperage draw of the grinder. No more tripping circuit breakers!!
- The 8274-4 has a 230 volt 3 HP motor that promotes a unique, National engineered, LED control box allowing the grinder to operate using 115 volt power.
- This active planetary grinder uses National’s patented self-tensioning, single belt technology to efficiently prepare concrete surfaces for coating applications and polishes to a 3000 grit shine.
- At almost 400 pounds, the 8274-4 provides down pressure, power and precision for jobs of all sizes.
- The self-diagnosing control box has a variable speed feature that minimizes tripped circuit breakers.
- The forward and reverse function increases tooling productivity through cleaner consumables and more even wear.
- The easy flip style side weight system applies additional down pressure when required.
- The grinder head rotates 90 degrees granting easy access to the quick change magnetic tooling. This provides safe and convenient change-out for multiple applications.
- The floating 9292 isolator assemblies enable the magnetic tooling to follow the contour of the concrete surface. This provides a uniform scratch pattern for coating applications or polishing concrete with surface undulations.
- The adjustable rubber dust guard provides a nearly dustless operation.
- Designed to be used in conjunction with National's 3474-L HEPA dust collector.
- The handle adjusts to a comfortable angle, height and grip.
- The modular design grants quick and safe transportation.
- This grinder promotes ease and maneuverability in small spaces and detailed edging within 1/8” to the wall.
- This machine operates a complete dry grind and polish system; eliminating messy and hazardous slurry.
- There is a one (1) year manufacturer’s warranty on parts and labor.
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
- Additional Information
Manufacturer National Product Type Surface Preparation SKU N-8274-4