Product Description
The CMT Undersized Bearing 1/2" is a precision replacement bearing designed specifically for use after the CMT 791.003.00 bearing has been worn down, allowing you to restore accurate self-guiding performance to your router bits without replacing the entire bit. Built from steel and engineered to the exact tolerances CMT router bits require, this bearing keeps flush trim, pattern, rabbeting, and profile bits running smoothly along templates and workpiece edges.
Key Features
- Steel construction - delivers the rigidity and durability needed to maintain consistent contact with templates and workpiece edges during repeated routing passes
- Undersized design for use after 791.003.00 - this bearing is the correct next-step replacement when the original bearing has worn, giving your router bit a second service life instead of requiring a full replacement
- 1/2" diameter - matches the guide bearing seat on compatible CMT router bits for a precise, rattle-free fit that preserves cutting accuracy
- 4.76mm bore diameter - sized to fit the bearing pin on applicable CMT bit shanks without slop or play, keeping the cutting edge at the correct offset from the template
- 5mm plate thickness - provides a consistent reference surface thickness so your router bit maintains the same depth relationship between the cutting edge and the guide bearing
- Black shield orientation is critical on reassembly - the black shield must face the correct direction to correspond with bearing rotation, ensuring the bearing runs freely and smoothly rather than binding or overheating
Why This Product
- Purpose-built as the correct follow-up replacement after CMT part 791.003.00, so you are always using the right bearing at the right stage of wear rather than guessing at compatibility
- Restores accurate self-guiding performance to flush trim, pattern, rabbeting, and profile bits - protecting the precision of your cuts without the cost of replacing the entire router bit
- Steel construction holds up to the friction and side-loading forces that guide bearings experience in both handheld router and router table applications
- Exact dimensional specifications (1/2" diameter, 4.76mm bore, 5mm plate thickness) mean no fitting, shimming, or modification is needed when swapping in this replacement bearing
Specifications
- Manufacturer Part Number: 791.063.00
- Brand: CMT Orange Tools
- Diameter: 1/2"
- Bore Diameter: 4.76mm
- Plate Thickness: 5mm
- Material: Steel
- Product Type: Undersized Router Bit Replacement Bearing
Approved Applications
- Replacing a worn CMT 791.003.00 bearing on compatible CMT router bits
- Restoring self-guiding function on flush trim router bits
- Maintaining guide bearing performance on pattern routing bits
- Servicing rabbeting bits and profile bits that use a 1/2" guide bearing
- Use with handheld routers and router tables
Frequently Asked Questions
When should I use the 791.063.00 instead of the 791.003.00?
The 791.063.00 is the undersized replacement bearing intended for use after the 791.003.00 bearing has been worn down. Once the original 791.003.00 bearing shows wear and is no longer performing accurately, the 791.063.00 is the correct next replacement to install.
Does the orientation of the black shield matter during reassembly?
Yes - this is a critical step. The black shield must be kept right side up to correspond with the direction of bearing rotation during reassembly. Installing it in the wrong orientation can cause the bearing to bind or run improperly, which affects both cut quality and bearing life.
What are the exact dimensions of this replacement bearing?
The 791.063.00 has a 1/2" outer diameter, a 4.76mm bore diameter, and a 5mm plate thickness. These dimensions are specific to compatible CMT router bit models that use this bearing size.
What types of router bits use this replacement bearing?
This bearing is used as a guide bearing on CMT flush trim bits, pattern bits, rabbeting bits, and profile bits that are compatible with the 791.003.00 and 791.063.00 bearing series. Check your CMT router bit documentation to confirm compatibility before ordering.
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