CMT Reduction Ring for Saw Blades - 1" x 3/4" by CMT is a precision-machined arbor adapter bushing designed to reduce a 1-inch (25.4mm) saw blade bore down to a 3/4-inch (19.05mm) arbor. This circular saw blade bushing gives woodworkers and tradespeople the flexibility to mount blades with a 1-inch arbor hole onto machines with a smaller 3/4-inch spindle, expanding the usable inventory of saw blades without requiring a blade replacement. The slim profile of this saw blade arbor adapter ring keeps it nearly invisible in the assembly while maintaining a snug, secure fit between the blade and the arbor.

Key Features

• Outer diameter of 1 inch (25.4mm) seats precisely into standard 1-inch bore saw blades - ensures a flush, wobble-free fit that protects cut quality and operator safety.
• Inner bore of 19.05mm accommodates 3/4-inch arbor spindles - lets you run a 1-inch bore blade on a machine with a smaller arbor without sourcing a different blade.
• Maximum thickness of 0.055 inch - the ultra-low profile keeps the ring from interfering with blade seating depth or blade guard clearance on stationary and sliding saws.
• Available in different saw blade arbor adapter ring sizes - allows you to build a matched set of reducing bushings for multiple machines and blade combinations in one product family.
• Designed specifically for saw blade bore reduction - engineered for the high-speed rotational demands of circular saw blades, miter saw blades, and table saw blades.

Why This Product

• Solves the mismatched arbor problem - when a quality saw blade has a 1-inch bore but your saw runs a 3/4-inch arbor, this ring bridges the gap precisely so the blade runs true without shimming or improvised fixes.
• Adjustable arbor hole compatibility means one blade can serve multiple machines - reducing waste and cost when switching blades between a table saw and a miter saw with different arbor sizes.
• The 0.055-inch maximum thickness is thin enough to fit within the clamping depth of most blade flanges - no need to modify the saw or the blade to accommodate the reducer.
• Part of a range of CMT reduction ring sizes - if your shop has blades and machines with varying bore and arbor dimensions, other sizes in the same CMT series can be selected to match each pairing.

Specifications

• Manufacturer Part Number: 299.213.00
• Brand: CMT Orange Tools
• Outer Diameter: 1 inch (25.4mm)
• Small Diameter: 19.05mm
• Bore Diameter: 19.05mm
• Maximum Thickness: 0.055 inch

Approved Applications

• Reduction rings for saw blades - reducing the arbor size of saw blades
• Circular saw blade bushing use - adjusting the arbor hole of circular, table, and miter saw blades

Frequently Asked Questions

What does this reduction ring actually do?

This saw blade arbor adapter ring reduces the bore opening of a saw blade that has a 1-inch (25.4mm) hole so it fits securely onto a 3/4-inch (19.05mm) arbor spindle. It sits between the blade bore and the arbor, filling the gap and centering the blade on the smaller spindle.

What are the exact dimensions of this ring?

The outer diameter is 1 inch (25.4mm), the bore diameter is 19.05mm, and the maximum thickness is 0.055 inch. These dimensions are fixed - confirm your blade bore and arbor size match before ordering.

Which types of saw blades and machines can use this bushing?

This reducing bushing is designed for use with circular saw blades, table saw blades, and miter saw blades. It is appropriate for any saw machine whose arbor measures 3/4 inch (19.05mm) and whose blade has a 1-inch bore.

Are other sizes of CMT reduction rings available if my blade or arbor dimensions are different?

Yes. CMT offers this type of saw blade arbor adapter ring in different sizes to accommodate various bore and arbor combinations. If the 1-inch outer diameter to 19.05mm bore pairing does not match your setup, look to the broader CMT reduction ring series for the correct size.