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FORGE 21 — 21" Planetary Concrete Floor Grinder & Polisher

21" Planetary Concrete Floor Grinder & Polisher

FORGE 21 Planetary Concrete Floor Grinder 21"

Nine heads. Full 360° planetary motion. Variable speed from zero to 1,800 RPM. Built to eliminate scratch marks, strip coatings, and deliver mirror-grade polish.

9-Head Planetary0-1800 RPM Variable10HP Motor11-Gal Water Tank

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Planetary Head Technology: The large drive plate rotates satellite heads in a full 360° orbit with zero gap coverage — eliminating swirl marks and uneven scratches left by standard rotary grinders.

$8,500

Overview

The FORGE 21 is a professional planetary concrete grinder engineered for contractors who demand a flawless finish — not just a ground floor. With nine grinding heads orbiting in continuous 360° planetary motion, this machine eliminates uneven scratch patterns and delivers consistent, gap-free surface contact across every inch of the working path. Variable speed from 0 to 1,800 RPM lets you dial in the aggression to match the job — from stripping stubborn epoxy to mirror-grade polish.

Planetary Heads

21"

Working Width

10HP

Motor Power

11 GAL

Water Tank

617 LB

Grinding Mass

9-Head Zero Gap

No missed zones, no repeat scratch arcs, no secondary cleanup passes required.

617 lbs + Counterweights

Machine mass is downforce — apply serious pressure without operator effort.

11-Gal Metal Water Tank

Integrated wet-grinding keeps silica suppressed and tooling cool — no cracking.

Bi-Directional Motor

Reverse rotation extends diamond pad life significantly, fewer change-outs per job.

Die-Cast Aluminum Gearbox

Sealed housing eliminates leakage and heat buildup during extended sessions.

Where It Works

Planetary Concrete PolishingEpoxy Coating RemovalTerrazzo RestorationMarble Surface PrepWarehouse FloorsHealthcare Facilities

Technical Specifications

Head Configuration

9-Head Planetary System

Working Width

21 inches

Motor

10HP / 7.5 kW — 60Hz

Voltage

220V — Single Phase — 30 Amp

Speed Range

0–1,800 RPM (Variable)

Compatible Tooling

4" Diamond, Trapezoid Full-Metal, Cutting Heads

Gearbox

High-Ratio Helical Gear — Sealed Die-Cast Aluminum

Water Tank

11-Gallon Full Metal

Downforce

617 lbs + Adjustable Counterweights

Weight

617 lbs

Shipping

Available to Most US States (LTL Freight)

⚖️ Equipment Weight: ~617 lbs — LTL freight shipping required

Ready to Spec the FORGE 21?

Freight shipping available to most US states. Contact us for a freight quote.

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