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National Flooring Equipment Planetary Floor Preparation System
Resolve uneven subfloor leveling problems with National Flooring Equipment 8274-4 3-HP Grinder on commercial floor renovation sites. The cast steel planetary head channels 3-HP on 115V current to profile concrete slabs without surface gouges.
- 3-HP motor powers triple grinding heads
- Cast steel housing adds abrasive head downpressure
- Triple planetary heads level rough concrete slabs
- Connects to 115V single-phase power outlets
In Stock
Description
Coating failures and uneven slab profiles plague commercial flooring crews during surface preparation. Run the National Flooring Equipment Planetary Floor preparation machine to grind away adhesive coatings and polish concrete flat. We rate this machine with four grinding heads across a wide prep path. Dropping the heads onto exposed steel expansion joint bolts shatters diamond tooling segments and twists drive couplings.
We pulled the planetary transmission cover to inspect the internal drive components. A heavy-duty motor drives a central sun gear that meshes with hardened planetary gear reduction sets. Sealed needle roller bearings support each satellite tool holder shaft to prevent runout during deep floor grinding passes. A cast aluminum housing sheds internal gear heat while dual lip oil seals keep concrete dust out of the grease bath.
Hardware Performance Matrix Breakdown
Commercial surface preparation demands flat multi-head rotation and steady machine downforce. Service mechanics monitor these seven hardware specifications during routine fleet maintenance.
- Planetary gear transmission counter-rotates four tool heads to produce flat scratch patterns.
- Direct gear drive mechanism eliminates drive belt slip during heavy concrete grinding passes.
- Multi-head tool plates accept standard trapezoid diamond grinding segments and carbide scrapers.
- Integrated water tank valve delivers controlled liquid flow for wet concrete slurry grinding.
- Dust containment skirt seals against floor surfaces to direct dust into vacuum ports.
- Collapsible steering handle folds forward to simplify transport inside commercial service vans.
- Adjustable chassis weights alter grinding downforce to accelerate coating removal rates.
Dyno Bench Load Telemetry
Matching this multi-head planetary drive on an air dynamometer requires 78 CFM at 90 PSI dynamic under full stall load. Tool head free speed turns 750 RPM but heavy aggregate grinding drags rotation down to 540 RPM. Air feed through a 50-foot hose creates an 18 PSI dynamic pressure drop at the inlet. Adiabatic expansion triggers a 34 degrees Fahrenheit drop, freezing sintered bronze exhaust muffler ports. Breakaway torque hits 82 foot-pounds at 86 dBA.
Field Service Trade Offs
Moving this planetary grinder across raw jobsite slabs requires muscle to guide the heads across high ridges. Operators running small utility compressors or unlubricated air setups must avoid air conversions because heavy grinding demands continuous massive air volume that stalls light air motors. Diamond segments require constant inspection.
- Wash concrete slurry and dried dust cakes off tool heads over shop wash tanks.
- Check planetary gear grease levels through the fill plug every one hundred hours.
- Examine dust skirt brushes for tears to maintain positive vacuum seal against slabs.
Commercial Warranty Terms Inventory
The builder covers this planetary floor system with a 1-Year limited warranty against manufacturing defects in components. The commercial shipping pallet holds the planetary floor prep machine, four diamond tool holder plates, splash skirt assembly, water tank kit, tool change spanner, and an industrial operator manual.
National Flooring Equipment Planetary Floor Preparation System Specs
| Brand Name | National Flooring Equipment |
| Assembled Weight (lbs) | 388 |
| California Proposition 65 Warning Required | Yes |
| Country of Origin | United States |
| Height (in) | 52 |
| Horsepower (hp) | 3 |
| MFG Part # (OEM) | 8274-4 |
| Package Contents | Planetary Floor Preparation System |
| Package Depth | 38.5 |
| Package Height | 27.5 |
| Package Weight | 389 |
| Package Weight (lbs) | 389 |
| Package Width | 20 |
| Product Condition | New |
| Restrictions | CA Prop 65 |
| UPC | 400274000117 |
| Voltage | 115 |
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