Abrasives

Matching Abrasive Material to the Workpiece

Selecting the correct abrasive mineral prevents premature wear and workpiece damage. For general-purpose metalworking, woodworking, and rust removal, emery cloth and aluminium oxide offer excellent durability. Heavy-duty applications like cutting stainless steel, iron, or steel rebar require tougher bonding agents and harder minerals.

For high-hardness metals and precision cutting, diamond-bonded wheels provide the longest service life and cleanest cuts. Resin-bonded discs excel in high-speed angle grinders, balancing heat resistance with structural integrity during aggressive material removal.

• Emery: Best for wood, drywall, and light metal sanding or rust removal.
• Aluminium Oxide: Ideal for rotary tool flap wheels, offering high durability on metals and hardwoods.
• Diamond: Essential for grinding and cutting stainless steel, iron, and hard alloys.
• Resin Bond: Provides structural flexibility and heat resistance for high-speed cutting discs.

Grit Sequencing for Surface Preparation

Industrial surface finishing requires a systematic progression from coarse material removal to fine polishing. Starting with too fine a grit wastes time and clogs the media. Conversely, starting too coarse can gouge the substrate.

Coarse grits are designed for aggressive stock removal, weld blending, and heavy rust grinding. Medium grits prepare surfaces for priming or secondary bonding. Fine to ultra-fine grits are reserved for final paint preparation, automotive polishing, and precision detail work.

• 40 to 80 Grit: Rapid weld blending, heavy rust removal, and rough material shaping.
• 100 to 180 Grit: Surface smoothing, drywall joint finishing, and general paint preparation.
• 240 to 320 Grit: Fine sanding of wood, metal, and plastic before applying topcoats.
• 300 to 1500 Grit: Micro-finishing, metal polishing, and automotive clear-coat preparation.

Verifying Shank Sizes and Disc Diameters

Industrial abrasives must match the mounting specifications of your power tools to ensure safe operation. Rotary tools, die grinders, and bench sanders use shank-mounted flap wheels, typically requiring 3mm or 6mm mandrels. Check your tool collet capacity before ordering to prevent vibration or slippage.

Angle grinders and cut-off tools use circular discs, with common diameters ranging from 75mm up to 125mm. Always verify that the disc diameter and arbor hole match your tool specifications exactly.

• 3mm Shank: Fits standard compact rotary tools for detailed grinding and deburring.
• 6mm Shank: Designed for industrial die grinders and heavy-duty rotary tools.
• 75mm Discs: Compact wheels for tight spaces and detailed metal cutting.
• 125mm Discs: Standard size for portable angle grinders used in weld preparation.