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STI 2418 Prep/Master Propane Grinder

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  • STI-2418 Prep/Master  Propane Grinder

 Product Description

Ideal for Polishing Projects up to 5,000 SF (500 M2)

The Prep/Master® 2418LP floor grinding machine has an 18HP Kawasaki propane motor that eliminates the need for transporting a generator to the job site. This grinder is ideal for mid-range projects, and combines the production capacity of a larger machine with the maneuverability of a smaller grinder. Its variable speed drive easily adapts to different grinding or polishing conditions for concrete, terrazzo, marble, and stone applications.

The moveable pocket weight system adjusts head pressure depending upon application and the standard water tank makes it easy to switch from dry to wet work. Uses four tool plates (included). Recommended for project sizes up to 5,000 SF (500m2).

Working width: 24 in. (61cm)
18HP Kawasaki motor
Uses propane fuel
4 tool plates (included)
Uses 12 tools



  • Machine Specs - Propane
  • Coverage: 5,000 SF (500 m2)
  • Motor: Kawasaki 18HP LP
  • Motor RPM: 2,200 - 3,650 RPM
  • Dimensions: 78 L x 24 W x 48 H in. (198 x 61 x 122 cm)
  • Working Width: 24 in. (61 cm)
  • Weight: 895 lbs (406 kg)
  • Tools Needed: 12
  • Tools RPM: 366-500 RPM
  • Tools Attachment Style: EG Attachment System
  • Vacuum Hose Connection: 3 in. (76 mm)
  • Recommended Vacuum: PM3003AR

Production Rates

  • Mastic Removal: 475 SF (45 m2) per hour
  • Thin Set Removal: 525 SF (50 m2) per hour
  • +/-25 Mil Coatings: 325 SF (30 m2) per hour
  • Concrete Polishing: 925 SF (90 m2) per hour

 Warranty Information

Prep/Master® Warranty

Substrate Technology guarantees that its machines and products are without manufacturing defects. The warranty period on machines is one (1) year from the date of sale and the variable speed drive carries a two (2) year warranty from the date of sale. Substrate Technology will replace any part that is defective at its own cost within the warranty period. This warranty does not cover wear items or instances of abuse or neglect.

 Other Details

Kawasaki 18HP LP
Motor RPM:
2,200 - 3,650 RPM
Vacuum Hoses (sold separately):
3 in/ 76 mm x 25 ft / 8 m x Two
585 lbs | 266 kg
Tool RPM:
366 RPM to 500 RPM
Pressure on Tools:
630 lbs / 286 kg with weights
Tools Available:
74" L x 30" W x 53" H / 188 cm x 76 cm x 132 cm
Cleaning Path:
24"/ 61cm x 42"/ 106 cm sweep
Mastic Removal:
450 sq ft/ 41.8 sq m per hour
Thin Set Removal:
500 sq ft/ 46.4 sq m per hour
Mil Coatings Removal:
300 sq ft/ 27.8 sq m per hour
Concrete Polishing:
900 sq ft/ 83.6 sq m per hour
STI 2418 Product Data:
Product Manual:

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