The CMT 299.219.00 Reduction Ring for Saw Blades is a precision-machined arbor adapter bushing designed to reduce a 1-inch (25.4mm) outer diameter bore down to a 22.2mm inner bore, giving woodworkers and contractors the flexibility to mount saw blades with different arbor hole sizes onto their existing equipment. This circular saw blade bushing from CMT makes it straightforward to adapt your blade inventory to a wider range of machines, eliminating the need to purchase separate blades for every tool you own.

Key Features

• Outer Diameter of 1 inch (25.4mm) - seats securely in standard 1-inch arbor bores found on a wide range of table saws and miter saws, ensuring a stable, wobble-free fit during cutting operations.
• Inner Bore of 22.2mm (F Diameter: 22.22mm) - precisely sized to accept saw blades with a 22.2mm arbor hole, allowing you to run blades that would otherwise be incompatible with your machine's arbor.
• Maximum Thickness of 0.091 inches - the low-profile design keeps the ring from interfering with blade guards, flanges, or arbor nuts, so blade installation stays smooth and secure.
• Available in different saw blade arbor adapter ring sizes - offering flexibility across a range of blade and machine combinations so you can standardize your blade accessories without compromise.
• Adjustable arbor hole compatibility - the reduction ring effectively adapts the blade's arbor hole to fit the machine's arbor, reducing the need to stock multiple blades in different bore sizes.

Why This Product

• If you have a saw blade with a 22.2mm arbor hole but your machine uses a 1-inch arbor, this ring closes that gap precisely - no guesswork, no unsafe improvisation, just a correctly sized, machined adapter that keeps your blade running true.
• The tight dimensional tolerance between the outer diameter (25.4mm) and the inner bore (22.2mm / 22.22mm) means the ring is engineered for a snug, centered fit - reducing vibration and helping maintain cut quality in table saw and miter saw applications.
• At a maximum thickness of just 0.091 inches, this reduction ring adds virtually no material stack-up to your arbor assembly, keeping the blade positioned correctly relative to flanges and arbor hardware.
• Because CMT offers this ring in different arbor adapter sizes, you can match this specific 1-inch to 22.2mm reducer to the exact pairing your equipment requires - rather than settling for an ill-fitting alternative.

Specifications

• Manufacturer Part Number: 299.219.00
• Brand: CMT Orange Tools
• Outer Diameter: 1 inch (25.4mm)
• Small Diameter (Inner Bore): 22.2mm
• Bore Diameter: 22.22mm
• Maximum Thickness: 0.091 inches

Approved Applications

• Reduction ring for saw blades - adapts the arbor hole of a circular saw blade to fit a machine with a different arbor size
• Compatible with table saw blades and miter saw blades requiring arbor size adaptation
• Circular saw blade bushing use - provides an adjustable arbor hole solution for blade-to-machine compatibility

Frequently Asked Questions

What does this reduction ring actually do?

This ring acts as an arbor adapter bushing. It fits inside a saw blade's 1-inch (25.4mm) arbor hole and reduces it down to a 22.2mm bore, allowing you to mount that blade onto a machine whose arbor shaft is 22.2mm in diameter. Without the ring, the blade would be too loose on the smaller arbor and unsafe to use.

Will this ring work with both table saws and miter saws?

Yes. This reduction ring is designed for use with circular saw blades in general, making it applicable to table saw and miter saw setups where the blade's arbor hole is 1 inch and the machine arbor is 22.2mm. Always confirm your specific machine's arbor diameter before installing any adapter ring.

Does the thickness of the ring affect blade installation?

The maximum thickness of this ring is 0.091 inches, which is intentionally low-profile. This minimal thickness is designed so the ring does not interfere with the arbor flanges or the arbor nut when the blade is tightened down, keeping the blade properly seated and secure during operation.

Are other sizes of this reduction ring available?

Yes. CMT offers this type of saw blade arbor adapter ring in different size combinations. The 299.219.00 specifically covers the 1-inch outer diameter to 22.2mm inner bore pairing. If your blade and machine require a different combination, other sizes in the CMT reduction ring lineup may be the appropriate choice.