STI Electric Concrete Floor Grinder 28″
STI Electric Concrete Floor Grinder 28″ is a professional-grade surface preparation and polishing machine engineered to deliver outstanding performance on commercial and residential flooring projects. Featuring a 28-inch grinding width and a powerful 7.5 HP WEG electric motor, available in 230V or 480V configurations with single- or three-phase power, this grinder provides the consistent torque needed for demanding grinding, polishing, coating removal, and surface preparation tasks. Its variable-speed drive, adjustable pocket-weight system, and built-in water tank allow operators to optimize head pressure and seamlessly switch between wet and dry applications, while the included tool plates deliver smooth, consistent multi-head grinding performance.
Designed for projects up to 2,000 sq ft (200 m²), the Prep/Master 2807 combines the productivity of larger machines with the maneuverability of a compact design. Equipped with two tool plates that support six tools, it is ideal for concrete grinding and polishing, epoxy and coating removal, terrazzo finishing, adhesive and mastic removal, and stone and marble polishing. Measuring 57″ L × 28″ W × 51″ H and weighing approximately 742 lbs, this electric floor grinder offers reliable indoor operation with lower emissions, eliminates fuel handling associated with propane equipment, and is fully compatible with STI tooling systems, making it a dependable solution for contractors seeking productivity, transportability, and exceptional finishing quality.
Electric Concrete Floor Grinder 28″ Main Features
- 28″ grinding width for increased productivity
- Powerful 7.5 HP (5.5 kW) WEG electric motor
- Available in 230V or 480V
- Single-phase or three-phase configurations
- Variable speed drive
- Adjustable pocket weight system
- Built-in water tank for wet or dry grinding
- Includes 2 tool plates with capacity for 6 tools
- Compatible with STI tooling systems
- Designed for projects up to 2,000 sq ft (200 m²)
- Lower emissions for indoor applications
- Easy to transport and maneuver
- Ideal for concrete, terrazzo, stone, and marble surfaces
STI Electric Concrete Floor Grinder 28″ Specifications
| Property | Value |
|---|---|
| Model | Prep/Master 2807 |
| Working Width | 28″ (71 cm) |
| Motor | WEG 7.5 HP (5.5 kW) Electric |
| Voltage | 230V or 480V |
| Power Configuration | Single Phase or Three Phase |
| Variable Speed | Yes |
| Tool Plates | 2 |
| Total Tool Capacity | 6 Tools |
| Water Tank | Integrated |
| Operation | Wet or Dry |
| Adjustable Weight System | Yes |
| Recommended Project Size | Up to 2,000 sq ft (200 m²) |
| Dimensions | 57″ L × 28″ W × 51″ H |
| Weight | Approx. 742 lbs (336 kg) |
| Compatible Tooling | STI Tooling System |
Electric Concrete Floor Grinder 28″ Video
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