Momma Bear 520 Planetary Floor Grinder

Product Overview

The Momma Bear 520 from Grizzly Grinders is a heavy-duty planetary floor grinder built for professional concrete surface prep and polishing. Powered by a 7.5 HP, 220V motor and engineered with a gear-driven planetary system, this machine delivers consistent torque and speed control on every pass. Whether you're removing coatings, prepping for epoxy, or polishing concrete to a high gloss, the Momma Bear is built to perform on jobs up to 5,000 square feet. Ideal for garages, warehouses, restaurants, and other light commercial projects where power and precision matter.

Key Features

• 7.5 HP, 220V, 30A motor delivers powerful and consistent grinding and polishing performance
• 520 mm grinding width with triple 9-inch floating heads for full surface contact
• Variable speed range from 300 to 1800 RPM for coating removal, prep, and polishing
• Precision aluminum planetary gearbox ensures stable torque and long service life
• 2-inch vacuum port supports dust control systems for cleaner operation
• Front and rear halogen lights for increased visibility in low-light jobsite conditions
• Built-in water tank for optional wet grinding or polishing applications
• Large 240 mm transport wheels make moving the unit on and off-site quick and easy

Recommended Uses

• Grinding and prepping concrete for epoxy coatings or overlays
• Polishing concrete floors to a smooth or high-gloss finish
• Resurfacing worn concrete in residential and commercial spaces
• Job sites up to 5,000 square feet, including garages, workshops, and retail areas
• Wet or dry grinding and polishing with proper containment

Installation Notes

For optimal results, pair the Momma Bear 520 with a high-CFM dust extractor and diamond tooling suited to the concrete condition and desired finish. Verify that your power source meets 220–240 V at 30 amps. When using the wet grind or polish feature, contain and manage slurry as required by jobsite standards.

Specifications

• Voltage: 220–240 V, 30 Amp
• Grinding Width: 520 mm
• Speed Range: 300–1800 RPM
• Weight: 478 lbs