The CMT Reduction Ring for Saw Blades - 30mm x 1 inch (25.4mm) is a precision-machined arbor adapter bushing designed to let you mount saw blades with a 30mm bore onto machines with a 1-inch (25.4mm) arbor. CMT engineers this circular saw blade bushing to deliver a secure, wobble-free fit, so you can expand your blade compatibility without compromising cutting accuracy. Whether you are outfitting a table saw or a miter saw, this saw blade arbor adapter ring bridges the gap between blade bore sizes and machine arbor sizes with confidence.

Key Features

• 30mm outer diameter to 25.4mm inner bore reduction - matches saw blades bored to 30mm directly to a 1-inch arbor machine, eliminating the need to source specialty blades for your equipment.
• Maximum thickness of 0.079 inches - the slim profile keeps the blade seated close to the arbor flange, minimizing runout and helping maintain precision cuts.
• Designed as a saw blade reducing bushing - purpose-built to adjust the arbor hole of circular saw blades, so one ring does the job cleanly without improvised adapters.
• Available in different saw blade arbor adapter ring sizes - part of a broader CMT reduction ring lineup, making it easy to find the right fit when your blade and arbor sizes do not match.

Why This Product

• If you own a 1-inch arbor saw and want to use European-standard 30mm bore blades, this adapter ring solves the compatibility problem instantly - no machine modifications required.
• The tight tolerance fit between the 30mm outer diameter and 25.4mm inner bore means the blade runs true, protecting your workpiece quality and extending blade life by reducing vibration.
• At a maximum thickness of 0.079 inches, the ring adds virtually no stack height between the blade and flange, keeping your blade height adjustments and guard clearances exactly as expected.
• As part of the CMT reduction ring series, this bushing is a straightforward, repeatable solution - useful any time a 30mm bore blade enters your workflow on a 1-inch arbor machine.

Specifications

• Manufacturer Part Number: 299.212.00
• Brand: CMT Orange Tools
• Outer Diameter: 30mm
• Inner Bore Diameter: 25.4mm
• Small Diameter: 25.4mm
• Maximum Thickness: 0.079 in.

Approved Applications

• Reducing the arbor size of saw blades to fit 1-inch arbor machines
• Adapting 30mm bore circular saw blades for use on 1-inch arbor table saws and miter saws
• Adjusting the arbor hole of circular saw blades for cross-compatibility between blade standards

Frequently Asked Questions

What does this reduction ring actually do?

This CMT reduction ring - also called an arbor adapter bushing or saw blade reducing bushing - fits inside the 30mm bore of a saw blade and reduces it down to a 25.4mm (1-inch) opening, so the blade can be mounted securely on a 1-inch arbor machine.

Will the 0.079-inch thickness affect how the blade sits on the arbor?

The maximum thickness of 0.079 inches is intentionally slim. The ring adds minimal stack height between the blade and the arbor flange, so blade seating and standard guard or flange clearances are not meaningfully affected during normal operation.

Is this ring compatible with both table saws and miter saws?

Yes. The saw blade reducing bushing is designed to reduce the arbor size of saw blades and works with any machine that uses a 1-inch (25.4mm) arbor, including stationary table saws and miter saws that accept blades with a 30mm bore.

Are other sizes available if my blade bore or arbor size is different?

Yes. This ring is part of a CMT reduction ring lineup that is available in different saw blade arbor adapter ring sizes, so you can select the combination that matches your specific blade bore and machine arbor dimensions.