Product Description
CMT Pair of Bore Reducers - 1-1/4" to 3/4" by CMT are precision-ground adapters designed to reduce a 1 1/4 in. bore down to 3/4 in., allowing cutter heads and saw blades to be mounted securely on smaller-diameter spindles and arbors. Sold as a matched pair and engineered for use on spindle moulders, shapers, and table saws, these bore reducers make it straightforward to fit tooling with a 1 1/4 in. center hole onto 3/4 in. spindle equipment - eliminating the need to source entirely new tooling when changing machine setups.
Key Features
- Reduces 1 1/4 in. bore to 3/4 in. - allows existing cutter heads and saw blades with a 1 1/4 in. bore to be used on machines with a 3/4 in. spindle or arbor, extending the usable life of your tooling investment.
- Sold and installed as a matched pair - using both reducers together ensures balanced, centered tool mounting that keeps the blade or cutter head running true and minimizes vibration.
- Bore diameter of 19.05 mm - precision-dimensioned for an accurate, snug fit within the tool bore, reducing slop and keeping tooling properly centered during operation.
- Compatible with spindle moulders, shapers, and table saws - provides versatile adaptability across multiple machine types so one pair of reducers can serve a range of shop equipment.
Why This Product
- Saves the cost of replacing tooling - instead of purchasing new blades or cutter heads sized for a 3/4 in. spindle, these reducers let you adapt existing 1 1/4 in. bore tooling to fit, protecting your equipment investment.
- Must-install-in-pairs design prevents off-center mounting - the matched pair requirement is a built-in safety and accuracy feature that keeps your cutter head or saw blade centered on the spindle during every cut.
- Fits multiple machine platforms - whether you are running a spindle moulder, a shaper, or a table saw, a single pair of these reducers bridges the bore gap across all three machine types.
- Straightforward bore adaptation - with a clear 1 1/4 in. to 3/4 in. reduction, there is no guesswork about fit, making it easy to confirm compatibility before installation.
Specifications
- Manufacturer Part Number: 699.031.19
- Brand: CMT Orange Tools
- Original Bore Diameter: 1-1/4 in.
- Reduced Bore Diameter: 3/4 in.
- Bore Diameter (metric): 19.05 mm
- Quantity: 2 pieces (must be installed in pairs)
Approved Applications
- Spindle Moulder
- Shaper
- Table Saw
- Bore Reduction
- Tool Mounting
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 will result in an unbalanced, off-center tool mount, which is unsafe and will negatively affect cutting accuracy. Always install both pieces together.
What size bore does this reducer adapt from and to?
This pair of bore reducers adapts from a 1 1/4 in. (19.05 mm) bore down to a 3/4 in. bore. If your cutter head or saw blade has a 1 1/4 in. center hole and your machine spindle is 3/4 in., this is the correct reducer pair for your application.
What machines are these bore reducers compatible with?
These bore reducers are designed for use on spindle moulders, shapers, and table saws. Any of these machines with a 3/4 in. spindle or arbor can use these reducers to mount tooling bored to 1 1/4 in.
Why are bore reducers sold and used in pairs?
Using a matched pair of bore reducers ensures that the tooling is evenly supported on both sides of the bore, keeping it centered and balanced on the spindle. This balanced installation is essential for safe operation and accurate, vibration-free cutting results.
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