Substrate Technology
CONSTRUCTION EQUIPMENT & SUPPLIES
Phone:
+1 (815) 941-4800
+1 (815) 941-4600 (fax)
Address:
1384 Bungalow Rd.
Morris, Illinois, U.S.A.

P/M Concrete Floor Grinding Machines

P/M Concrete Floor Grinding Machines

Concrete Floor Grinders for Sale

Substrate Technology manufactures the Prep/Master line of concrete floor grinders — durable, American-made machines built for contractors who grind, prep, and polish concrete every day. Whether you're refinishing a single residential garage or prepping hundreds of thousands of square feet of warehouse floor, we have a floor grinder sized for the job, plus the diamond tooling and support to get predictable results.

A floor grinder for every project size

Compact grinders like the Prep/Master Jr. handle residential garages, basements, and small commercial spaces. Walk-behind floor grinders, electric or propane — including our popular Prep/Master 3030 — cover medium to large jobs. And for the biggest warehouse and industrial floors, our largest floor grinder offer working widths up to 44 inches to cover ground fast.

Why contractors choose Prep/Master grinders

For more than 25 years, flooring and concrete professionals have relied on Prep/Master grinders for their durability and low maintenance under hard daily use. Every machine is engineered to pair with STI diamond tooling, so you move from grind to polish with consistent, scratch-free results. And when you call us, you reach a real expert — not a queue.

A complete prep-to-polish system

Pair your floor grinder with a Prep/Master dust collector for cleaner, OSHA-compliant job sites, plus the right diamond tooling and pads for the finish you want. We supply the whole system, not just the machine.

Get a quote

Ready to find the right concrete floor grinder for your next project? Tell us about the job and we'll recommend the right machine, tooling, and accessories. Call +1 (815) 941-4800 or request a quote today.

Frequently asked questions

What size concrete floor grinder do I need? It depends on your square footage. Compact grinders suit garages and small rooms, walk-behind machines handle most commercial jobs, and ride-on grinders are best for large warehouses. Not sure? Call us and we'll help you choose.

What's the difference between a floor grinder and a shot blaster? A floor grinder uses diamond tooling to grind, smooth, and polish concrete, while a shot blaster propels steel shot to aggressively profile and clean a surface. Many contractors use both.

Are your floor grinders made in the USA? Yes — Prep/Master grinders are manufactured by Substrate Technology in Morris, Illinois.

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Prep/Master 2418LP propane concrete floor grinder

Propane Concrete Floor Grinder 24″

  • Working width: 24 in. (61cm)
  • For projects up to 5,000 SF (500 m2)
  • Motor: Kawasaki 18HP LP
  • Uses propane fuel
  • Use for surface prep and polishing of concrete, terrazzo, and marble
  • Item # 432418001

electric concrete floor grinder Prep Master 2420

Electric Concrete Floor Grinder 24″

  • Working width: 24 in. (61cm)
  • For projects up to 5,000 SF (500m2)
  • Electric motor: 20 HP (14.7kW)
  • 1 or 3 phase
  • Available in 230V or 480V
  • Use for surface prep and polishing of concrete, terrazzo, and marble
  • Item #  4324200230 – 230 Volt
  • Item #  4324200480 – 480 Volt

electric concrete floor grinder Prep Master 2807

Electric Concrete Floor Grinder 28″

  • Working width: 28 in. (71cm)
  • For projects up to 2,000 SF (200m2)
  • Electric motor: 7.5 HP (5.5kW)
  • 1 or 3 phase
  • Available in 230V or 480V
  • Use for surface prep and polishing of concrete, terrazzo, and marble
  • Item # 4328070230 – 230 Volt
  • Item# 4328070480 – 480 Volt

electric concrete floor grinder Prep Master 3030

Electric Concrete Floor Grinder 30″

  • Working width: 30 in. (76cm)
  • For projects up to 10,000 SF (1,00m2)
  • Electric motor: 30 HP (22kW)
  • 1 or 3 phase
  • Available in 230V or 480V
  • Use for surface prep and polishing of concrete, terrazzo, and marble
  • Item # 433030230 – 230 Volt
  • Item# 433030480 – 480 Volt

electric concrete floor grinder Prep Master 4430

Electric Concrete Floor Grinder 44″

  • Working width: 44 in. (112cm)
  • For projects up to 20,000 SF (2,00m2)
  • Electric motor: 30 HP (22kW)
  • 1 or 3 phase
  • Available in 230V or 480V
  • Use for surface prep and polishing of concrete, terrazzo, and marble
  • Item # 434430230 – 230 Volt
  • Item# 434430480 – 480 Volt

electric concrete floor grinder Prep Master PM Jr

Electric Concrete Floor Grinder 23″

  • Working width: 23 in. (58cm)
  • For projects up to 1,000 SF (100m2)
  • Electric motor: 7.5 HP (5.5kW)
  • Single phase
  • Available in 230V
  • Use for surface prep and polishing of concrete, terrazzo, and marble.
  • Item # 823752250

Purchase a Prep/Master Floor Grinder Today

For a powerful, durable floor grinder that saves you surface preparation time while getting the professional results you want, call us to purchase a Prep/Master floor grinder. To learn more about our selection and find the right option or to get our best price, reach out to us today at  +1 (815) 941-4800 or fill out our contact form to get started.