3.5mm High Hub 12mm Bore to 16mm Adapter Rings & Flanges for Grinding Wheels and Cutting Discs

This 22mm to 12mm Grinding Wheel Bore Adapter Kit is engineered for precise arbor-hole conversion while maintaining optimal balance, concentricity, and operational safety. Manufactured from high-strength aluminum alloy, the reducer bushings deliver excellent durability, heat resistance, and dimensional accuracy, ensuring stable performance even under high-RPM grinding conditions.

This 12mm to 16/20/25.4/32mm Grinding Wheel Bore Adapter Kit is designed for professional and DIY workshops to convert 12mm arbor holes to larger sizes, enabling secure mounting of grinding wheels, cutting discs, sanding wheels, and diamond grinding wheels. Manufactured from high-strength aluminum alloy, the reducer rings provide excellent durability, heat resistance, and dimensional accuracy, ensuring safe and vibration-free operation.

The kit includes precision-machined aluminum reducer rings for 16mm, 20mm, 25.4mm, and 32mm, along with thickened pressure flanges that enhance stability and balance during high-speed rotation. Compatible with a wide range of grinding and cutting wheels, including Resin wheels, diamond wheels, cup wheels, flat wheels, flap discs, etc., suitable for metalworking, woodworking, stone processing, fabrication, and general workshop applications.

⭐ Key Features

• Accurate Size Conversion: Converts wheel inner bore 12mm → 16/20/25.4/32mm
• High-Quality Aluminum Construction: Lightweight, strong, corrosion-resistant
• Reverse-Thread Safety Screw: Prevents loosening during rotation
• Thickened Spacer Options: Improves balance, support, and installation stability
• Multiple Length Choices: Fits different wheel structures and mounting depths
• Wide Compatibility: Works with angle grinders, bench grinders, polishing tools, and more
• Versatile Wheel Support: Resin wheels, diamond wheels, cup wheels, flat wheels, flap discs, etc.

✅ Applications

• Bore reduction for grinding wheels (12mm → 16/20/25.4/32mm)
• Installing wheels on tools with smaller arbor shafts
• Cutting, grinding, sanding, deburring, polishing
• Metalworking, woodworking, stone processing, fabrication
• DIY workshop and professional equipment maintenance