Product Description
CMT Pair of Bore Reducers - 1-1/4" to 30mm by CMT are precision-ground adapters designed to convert a 1-1/4" tool bore down to 30mm, allowing cutter heads and saw blades to be mounted securely on smaller-diameter arbors. Sold as a matched pair and intended for use on spindle moulders, shapers, and table saws, these reducers make it possible to run 30mm-bore tooling on machines with a 1-1/4" spindle without replacing the blade or cutter head - saving time and expanding compatibility across your shop's equipment lineup.
Key Features
- Converts 1-1/4" bore to 30mm - adapts existing cutter heads and saw blades to fit 30mm arbors, extending the usable life of your tooling investment and reducing the need to purchase duplicate tools for different machines.
- Sold and installed in pairs - both reducers must always be installed together to ensure balanced, centered tool mounting, preventing vibration and maintaining accurate cuts.
- Precision-ground fit - manufactured to close tolerances so the cutter head or saw blade seats concentrically on the arbor, supporting smooth, consistent performance during operation.
- Compatible with spindle moulders, shapers, and table saws - versatile across multiple machine types, making this a practical shop accessory for woodworkers who operate more than one type of stationary tool.
Why This Product
- If you have a 1-1/4" bore cutter head or saw blade and need to mount it on a 30mm spindle, these reducers solve that compatibility gap directly - no custom machining or workarounds required.
- Because they are supplied as a matched pair, you always have both pieces needed for a proper, safe installation without tracking down a second reducer separately.
- The close-tolerance ground fit keeps tooling centered on the arbor, which is critical for vibration-free cutting and consistent results on shapers, spindle moulders, and table saws alike.
- Using a single pair of bore reducers to adapt existing tooling across machines reduces the cost of outfitting a shop with duplicate cutter heads or blades in different bore sizes.
Specifications
- Brand: CMT Orange Tools
- Order Number: 699.031.30
- Diameter: 1-1/4"
- Bore Diameter: 30mm
- Quantity: 2 pieces (must be used in pairs)
Approved Applications
- Bore reduction from 1-1/4" to 30mm
- Cutter head and saw blade mounting on spindle moulders
- Tool mounting on shapers
- Arbor adaptation on table saws
Frequently Asked Questions
Can I use just one bore reducer instead of both?
No. These bore reducers must always be installed in pairs. Using only one reducer would result in unbalanced, off-center tool mounting, which creates vibration and unsafe cutting conditions. Always install both pieces together.
What bore size conversion do these reducers provide?
These reducers adapt a 1-1/4" tool bore down to a 30mm bore. They are intended for cutter heads or saw blades that have a 1-1/4" bore and need to be mounted on a 30mm-diameter spindle or arbor.
What types of machines are these bore reducers compatible with?
These CMT bore reducers are approved for use on spindle moulders, shapers, and table saws - any of these stationary woodworking machines where a 1-1/4" to 30mm bore conversion is needed.
Why is a precision fit important in a bore reducer?
A close-tolerance, precision-ground fit ensures the cutter head or saw blade is seated concentrically on the arbor. This prevents runout and vibration during operation, which directly affects cut quality and tool safety on spindle moulders, shapers, and table saws.
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