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Prep/Master Jr. Concrete Floor Grinder/ Polisher

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  • Prep/Master Jr. Concrete Floor Grinder/ Polisher
  • Prep/Master Jr. Concrete Floor Grinder/ Polisher
  • Prep/Master Jr. Concrete Floor Grinder/ Polisher
$8,950.00
SKU:
8237522

 Product Description

Ideal for Polishing Projects up to 1,000 SF (100 M2)

Our customers' favorite little grinder! The Prep/Master® Jr. floor grinding machine by STI works extremely well in small, hard-to-reach areas that requires a more compact design — perfect for residential garage floors and basements.

This grinder is very aggressive, yet extremely easy to operate due to the smooth operation of the STI rotary gear system. In addition, the low price of the Prep/Master Jr. is very affordable and fits any project budget.

Working width: 23 in. (58cm)
7.5 HP (5.6kW)
220-240V Single Phase, 40A
450 lbs. (204 kg) including pocket weights
2 tool plates (included)
Uses 6 tools

Special Features:

  • Heavy head pressure for a better grind and polish — 60% of its weight is on the head!
  • Magnetic LED Light to illuminate front of machine or behind machine on the cutting path
  • Easy disassembly of machine into two sections for easier transportation
  • (Grinding head = 260 lbs. / Handle = 130 lbs. / Two Pocket Weights = 30 lbs. each)
  • Screw-in Carrying Poles for two-three person lifting
  • 8-gallon (30 liters) water tank
  • On-board USB Charger & Phone Carrier

Specifications:

  • Coverage: Up to 1,000 SF (100 m2)
  • Power Source: 220-240V Single Phase, 40A
  • Motor: 7.5 HP, Variable Speed Drive (5.6kW)
  • Dimensions: 50 L x 23 W x 48 H in. (127 x 58 x 122 cm)
  • Working Width: 23 in. (58cm)
  • Weight: 450 lbs. (204 kg) including pocket weights
  • Tools RPM: 250-500 RPM Variable
  • Tools Attachment Style: EG Proprietary Attachment System
  • Vacuum Hose Connection: 2 in. (50 mm) sold separately
  • Recommended Vacuum: PM3003AR

Production Rates:

  • Mastic Removal: 200 SF (20 m2) per hour
  • Thin Set Removal: 200 SF (20 m2) per hour
  • +/-25 Mil Coatings: 200 SF (20 m2) per hour
  • Concrete Polishing: 300 SF (30 m2) per hour

STI Diamond Systems that can be used on the Prep/Master Jr:

  • Polished Concrete: EGT Polishing System (dry) & CLC Polishing System (wet-dry)
  • Polished Terrazzo: TPS Polishing System

 Warranty Information

PREP/MASTER JR. CONCRETE FLOOR GRINDER/ POLISHER® 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

Motor:
7.5 HP Variable Speed Drive / 5.6 kW
Power Source:
220 - 240V/ 1 Phase, 40A
Vacuum Hose Connection:
2" / 50mm
Weight:
395 lbs / 106 kg
Tool RPM:
250-500 RPM Variable
Dimensions:
50" L x 23" W x 48" H / 127 cm x 58 cm x 122 cm
Recommended Vacuum:
3003G (300CFM) or equivalent
Mastic Removal:
200 sq ft/ 19 sq m per hour
Thin Set Removal:
200 sq ft/ 19 sq m per hour
Mil Coatings Removal:
50 sq ft/ 5 sq m per hour
Concrete Polishing:
300 sq ft/ 28 sq m per hour
Product Data Sheet:

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