✨ Unitised Pre-Polishing Discs for Surface Preparation & Finishing

Streamline your metal prep and polishing process with these high-performance unitised pre-polishing discs, designed to eliminate multiple traditional steps in surface refinement. Ideal for stainless steel, aluminium, brass, and other metals, these discs offer controlled finishing, weld blending, and light grinding—all without needing a backing pad.

Mounted on a durable fibreglass backing plate, these discs attach directly to your 115mm or 125mm angle grinder using the standard 22.2mm bore. Best used on variable speed grinders or polishers, they deliver optimal results between 4,000–5,000 RPM.

✅ Key Features:

• No backing pad required – quick setup and easy mounting

• Made with non-woven abrasive material for consistent finishing

• Free from iron contamination – safe for stainless steel

• Mounted on fibreglass backing plates (22.2mm bore)

• Suitable for cool grinding and polishing operations

• Available in multiple grades for customized aggression and finish quality

📐 Specifications:

• Material: Non-woven unitised abrasive

• Mounting: 22.2mm centre hole (standard angle grinder fitting)

• Sizes: 115mm & 125mm

• Recommended Speed: 4,000–5,000 RPM

• Max Speed: 115mm – 10,000 RPM | 125mm – 8,000 RPM

• Use On: Stainless steel, aluminium, brass, and more

🛠️ Grade Selection Guide:

• FAG Grade 4 (Softest):

  • Ideal for paint & coating removal

  • Excellent conformity for complex shapes and aluminium finishing

• SAG Grade 5 (Medium):

  • Known as a true pre-polishing disc

  • Use for general surface improvement and fine finishing

• SAG Grade 7 (Medium-Hard):

  • Ideal for blending TIG welds or removing grind lines

  • Slightly more aggressive than Grade 5

• MAG Grade 6 (Aggressive):

  • For light grinding, metal removal, and swirl mark finishes

  • Low clogging on aluminium and brass

  • Leaves a consistent fine swirl finish

💡 Ideal For:

• Pre-polishing and final stage surface prep

• TIG weld blending and scratch removal

• Working on stainless steel, aluminium, and non-ferrous metals

• Replacing multi-step polishing processes with a single tool

Achieve consistent, clean finishes with fewer steps—shop our unitised pre-polishing discs today for efficient, high-quality metal surface preparation.