Mounted Abrasive Stone- Medium/Hard - Fig. 631 - Ø5.5mm

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The Busch High Grade Corundum Abrasive Wheel Shape 631 Ø5.5mm is a premium-quality mounted abrasive designed for precision grinding, smoothing, deburring, and pre-polishing of medium-hard metal alloys used in jewelry manufacturing, goldsmithing, silversmithing, and precision metalworking.

Manufactured from high-purity pink aluminium oxide (Al₂O₃), this abrasive wheel offers excellent cutting performance, long service life, and consistent material removal.

The medium grit size combined with a medium bonding hardness provides the ideal balance between cutting efficiency and surface finish, making it suitable for shaping, refining, and preparing metal surfaces prior to polishing.

Shape 631 is particularly suited for smoothing flat and slightly contoured surfaces, refining castings, deburring edges, and preparing jewelry components for final polishing. The 055 diameter tapered wheel design provides excellent precision, controlled abrasion, and consistent material removal on medium-hard metal alloys, making it ideal for detailed finishing and surface refinement applications.

Specification

• Brand: Busch
  
• Material: Pink Corundum (Al₂O₃)
  
• Shape: 631
  
• Diameter: 5.5 mm
  
• Grit: Medium
  
• Bond Hardness: Medium
  
• Recommended Materials: Medium-hard metal alloys
  
• Shank Diameter: 2.35mm
• Max: 50000 tours/min

These mounted stones are widely used in jewelry making, goldsmithing, silversmithing, watchmaking, and precision metalworking for grinding, smoothing, deburring, refining castings, removing tool marks, and preparing surfaces for polishing. They are particularly effective on medium-hard metal alloys, offering controlled cutting action and a uniform surface finish.

Busch corundum abrasives are trusted worldwide by jewelers and precision craftsmen for their durability, accuracy, and consistent finishing performance.