The GP3000 is National's 28" counter-rotational grinder and polisher, powered by a 25 HP three-phase electric motor. National rated it for mastic, thin-set and coating removal and for concrete polishing.
National no longer lists the GP3000 on its website. The manual below is the latest revision National published.
Specifications
Specs from the GP3000 operating manual (403310 Rev D) and National's older shop page for the machine.
| Spec | Value |
|---|---|
| Cleaning path | 28" (71 cm) |
| Dimensions | 29.5" W x 72.25" L x 52" H (75 x 183 x 132 cm) |
| Weight | 1,425 lb (646 kg) |
| Grinding pressure with weights | 1,090 lb (494 kg) |
| Tooling RPM | 385-600 |
| Motor | 25 HP (18.6 kW), three phase, 230/415 V, 60/50 Hz |
| Amps | 3-phase 230 V / 69 A (manual); 30 A draw, 60/50 A circuit (shop page) |
| Production rates | Mastic 1,000 sq ft/hr; thin-set 1,500; mil coatings 750; polishing 2,500 |
Maintenance schedule
From National's GP3000 operating manual (403310 Rev D). The manual also covers clutch, belt, gear replacement and timing, and drive plate procedures.
| Interval | What to do |
|---|---|
| Daily (after each day's grinding) | Clean the machine; clean the air filter |
| Weekly | Check coupling bolts for tightness |
| Every six months | Grease fittings (4), 3 shots each |
| Once a year | Check main gear box grease level through the front plug |
Fluids and lubricants
Lubricants named in the GP3000 manual.
- Main gear box: holds 28 lb of grease
Videos from National
National's GP3000 video.
Sources
Everything on this page comes from National Flooring Equipment's own published material.
