10mm Bore to 30mm Step Arbor Reducer Flange – Precision 3.5mm Adapter for Grinding & Saw Blade Mounting

A precision-machined arbor reducer flange that adapts a 10mm bore wheel or blade to a 30mm step diameter spindle. With a 3.5mm step height and 4–5mm total adapter thickness, this flange provides a stable, centered clamping surface that eliminates wobble and runout during grinding or cutting. Designed for bench grinders, lapidary machines, and diamond saw setups where bore-to-spindle mismatches require a reliable, vibration-free solution.

Specifications

Compatible Applications

• Grinding wheels — adapt 10mm bore wheels to 30mm spindle diameter on bench grinders
• Diamond saw blades — secure blade mounting where bore and spindle sizes differ
• Lapidary machines — compatible with standard lapidary bench grinders and combination machines
• Polishing and buffing setups — centered flange support for smooth, vibration-free operation
• Workshop saws — trim saws and slab saws with 30mm spindle and 10mm bore blades