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Substrate Technology, Inc.

STI-4430 Prep/Master Electric Grinder

STI-4430 Prep/Master Electric Grinder The Prep/Master STI-4430 is an ideal choice for project sizes greater than 20,000 SF (1858 m2). Quite unexpectedly for its 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. Available in 230V or 480V. Uses eight tool plates (included).


80"L x 44"W x 52"H (203cm x 112cm x 132cm)


1,460 lbs (662kg)

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