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Substrate Technology Machines

Floor Machines

Prep/Master® STI-3030

Floor Grinding Machine (Electric)
Motor 30 HP - 3 Phase | 22 kW
Power Source 220/230 VAC 1 Or 3 Phase 60 Hz | 380/480 VAC 3 Phase 50-60 Hz
Power Cord 30 ft. | 9 m (6-4)
Vacuum Hose Connection 3 in. (76mm) x 25 ft. (8 m)
Weight 1320 lbs | 599 kg
Tool RPM 300 RPM - 750 RPM Variable
Number Of Tools 12
Tools Attachment Style EG Proprietary Attachment System
Length x Width x Height 86 x 30 x 52 in. | 218 x 76 x 132 cm
Recommended Vacuum Duo Vac (630) CFM With Pre-Separator Or Equivalent
Mastic Removal 600 SF (56 m2) per hr
Thin Set Removal 600 SF (56 m2) per hr
Mil Coatings Removal 425 SF (39 m2) per hr
Polished Concrete 1200 SF (111.5 m2) per hr

  • The Prep/Master STI-3030 floor grinding machine is an ideal choice for project sizes up to 10,000 SF (1,000 m2). Despite its heavy weight and size, this grinder is extremely easy to operate due to the smooth operation of the STI rotary gear system. Its 30HP motor is built to last and 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. The 3030 is available in 230V and 480V. Uses four tool plates (included) and twelve tools