The Grinders/Polishers category offers diverse high-performance equipment tailored for surface preparation, grinding, and polishing applications across various industries. Designed to deliver exceptional results with efficiency and precision, our grinders and polishers are equipped with advanced features and technologies to meet the demands of professional contractors, craftsmen, and facility managers. Here’s an overview of our offerings in this category:
- Concrete Grinders: Our concrete grinders are purpose-built for surface preparation and leveling tasks, removing coatings, adhesives, and surface imperfections from concrete floors and other substrates. Available in a range of sizes and configurations, these grinders feature powerful motors, adjustable speed settings, and ergonomic designs for optimal control and productivity in diverse applications.
- Polishing Machines: Transform concrete, terrazzo, and stone surfaces into glossy, durable finishes with our polishing machines. Engineered for precision and efficiency, these machines utilize diamond tooling and variable speed controls to achieve desired sheen levels and clarity. Whether you’re polishing large commercial floors or intricate countertops, our polishers deliver consistent results with minimal effort and downtime.
- Edge Grinders: Edge grinders are designed to tackle hard-to-reach areas and edges on concrete floors and countertops. Compact and maneuverable, these machines feature adjustable guard designs and versatile tooling options to ensure precise grinding and polishing along walls, corners, and edges, achieving uniform surface finishes in confined spaces.
Our company is committed to providing the highest quality grinders and polishers backed by expert support and technical assistance. Whether preparing surfaces, grinding, or polishing concrete, stone, or other materials, trust our Grinders/Polishers category to deliver the performance, reliability, and efficiency you need to achieve exceptional project results. Our comprehensive selection of equipment and accessories empowers our customers to tackle surface preparation and finishing tasks with confidence and precision.
Grinders/Polishers
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Grinders/Polishers, Equipment & Instruments
STI EG Grout Pans
- Patent-pending stainless steel grout pans
- Designed for Prep/Master® floor grinders
- Fills pinholes and small voids in epoxy terrazzo and concrete
- Creates a smoother, denser surface before final polishing
- Essential grouting step in the TPS Terrazzo Polishing System
- Used with epoxy and marble flour (calcium carbonate powder)
- Recommended operating speed: 15Hz (electric) or 2100 RPM (propane)
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Grinders/Polishers, Equipment & Instruments
STI Electric Concrete Floor Grinder 24″
- 24″ grinding width for efficient surface coverage
- Powerful 20 HP (14.7 kW) WEG electric motor
- Available in 230V or 480V
- Single-phase or three-phase configurations
- Variable speed drive
- Adjustable pocket weight system
- Built-in water tank for wet or dry grinding
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Grinders/Polishers, Equipment & Instruments
STI Electric Concrete Floor Grinder 28″
- 28″ grinding width for increased productivity
- Powerful 7.5 HP (5.5 kW) WEG electric motor
- Available in 230V or 480V
- Single-phase or three-phase configurations
- Variable speed drive
- Adjustable pocket weight system
- Built-in water tank for wet or dry grinding
- Includes 2 tool plates with capacity for 6 tools
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Grinders/Polishers, Equipment & Instruments
STI Electric Concrete Floor Grinder 30″
- 30″ grinding width for maximum production
- Powerful 30 HP (22 kW) WEG electric motor
- Available in 230V or 480V
- Single-phase or three-phase configurations
- Variable speed drive
- Adjustable pocket weight system
- Built-in water tank for wet or dry operation
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Grinders/Polishers, Equipment & Instruments
STI Electric Concrete Floor Grinder Junior 23″
- 23″ grinding width
- 7.5 HP (5.5 kW) WEG electric motor
- 230V single-phase operation
- Variable speed drive
- Includes 2 tool plates supporting 6 tools
- Adjustable pocket weight system
- Approximately 60% of machine weight concentrated on the grinding head
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Grinders/Polishers, Equipment & Instruments
STI Electric Concrete Floor Grinder Senior 27″
- 27″ grinding width
- 20 HP (14 kW) WEG electric motor
- 230V single-phase or three-phase operation
- Variable speed drive
- Includes 4 tool plates supporting 12 tools
- Adjustable pocket weight system
- Approximately 60% of machine weight concentrated on the grinding head
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Grinders/Polishers, Equipment & Instruments
STI Lavina L20GS7 Propane Grinder
- 18 HP (13 kW) Kawasaki FS481V 603 cc propane engine
- 20″ working width
- Planetary grinding system
- Lavina S7 Series design
- Completely redesigned chain-driven planetary drive
- Stronger timing belt
- Upgraded shafts, seals, and bearings
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Grinders/Polishers, Equipment & Instruments
STI Lavina L25S7 Electric Grinder
- 10 HP (7.5 kW) electric motor
- 200–240V, single- or three-phase operation (50–60 Hz)
- 26.5″ working width
- Planetary grinding system
- Sealed, dust-proof grinding head
- Redesigned chain-driven planetary drive without chain tensioner
- Stronger timing belt for longer service life
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Grinders/Polishers, Equipment & Instruments
STI Lavina L30GS7 Propane Grinder
- 24 HP (17.9 kW) KOHLER® PCV740 747 cc propane engine
- Optional 19 HP Kawasaki FX600V propane engine
- 30.8″ working width
- Planetary grinding system
- Lavina S7 Series design
- Sealed, dust-proof grinding head
- Redesigned chain-driven planetary drive
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Grinders/Polishers, Equipment & Instruments
STI Maintenance Kit – P/M Propane 2418LP/2818LP
- Complete maintenance kit for Prep/Master® 2418LP and 2818LP propane grinders.
- Helps reduce downtime by keeping essential service parts readily available.
- Includes engine, filtration, ignition, and drive system maintenance components.
- Supports routine preventive maintenance for improved machine reliability.
- Genuine STI replacement parts designed for optimal equipment performance.
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Grinders/Polishers, Equipment & Instruments
STI Maintenance Kit – P/M Propane 3038LP/4438LP
- Preventive maintenance kit for Prep/Master® 3038LP and 4438LP propane grinders.
- Designed for 30-inch and 44-inch propane Prep/Master® grinding machines.
- Helps reduce downtime by keeping essential maintenance parts readily available.
- Includes engine, filtration, ignition, and drive system replacement components.
- Supports routine maintenance to maximize equipment reliability and performance.
- Genuine STI replacement parts for professional maintenance.
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Grinders/Polishers, Equipment & Instruments
STI Morflex Coupler
- Flexible drivetrain coupling designed for Prep/Master® machines.
- Absorbs shock and minor misalignment to protect internal components.
- Helps reduce stress on the engine and gearbox.
- Replacement wear part that restores smooth machine operation.
- Available for multiple Prep/Master® grinder models.
- Helps minimize downtime by keeping a spare part available when needed.
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Grinders/Polishers, Equipment & Instruments
STI Propane Concrete Floor Grinder 24″
- 24″ grinding width for increased productivity
- 18 HP Kawasaki propane engine
- No generator or power cords required
- Variable speed drive
- Adjustable pocket weight system
- Built-in water tank for wet or dry operation
- Includes 4 tool plates supporting 12 tools















