Product Description
The CMT 791.011.00 Bearing 3/4" - 1/2" is a precision steel replacement bearing designed to keep CMT router bits running smoothly and accurately. With a 3/4" outer diameter and a 12.7mm bore, this guide bearing is the right fit for restoring or upgrading flush trim bits, pattern bits, rabbeting bits, and profile bits. Whether you are replacing a worn bearing on a well-used router bit or building out a complete set of guide bearing spares, this compact 4mm plate thickness bearing delivers the tight tolerances that self-guided routing demands.
Key Features
- Steel construction - provides the durability and rigidity needed to withstand the lateral forces and heat generated during repeated routing passes along templates and workpiece edges.
- 3/4" outer diameter - a precise, standard size that determines the cutting offset on flush trim, pattern, and profile bits, giving you consistent, repeatable results at the router table or with a handheld router.
- 12.7mm bore diameter - fits the 1/2" shank pilot of CMT router bits, locking the bearing securely in place without play or wobble during operation.
- 4mm plate thickness - a slim profile that keeps the bearing seated correctly within the bit body and reduces interference with the cutting geometry.
- Black shield orientation - the bearing features a directional black shield that must be kept right side up to correspond with bearing rotation during reassembly, ensuring proper function after installation.
Why This Product
- A worn or seized guide bearing is one of the most common causes of poor edge quality and burning on routed profiles - replacing it with a correctly sized steel bearing restores the smooth self-guiding action your bit was designed to deliver.
- The 3/4" outer diameter and 12.7mm bore are matched to the 1/2" pilot specs found on a wide range of CMT flush trim, pattern, rabbeting, and profile bit bodies, making this a versatile spare to keep on hand.
- At 4mm plate thickness, the bearing sits flush within the bit design without altering the intended cutting depth or offset, so your first pass after a bearing swap cuts exactly as expected.
- The steel build means this bearing holds up under the continuous contact and rotation loads of production routing work, not just occasional hobby use - making it a practical maintenance part for woodworkers who rely on their CMT bits regularly.
Specifications
- Manufacturer Part Number: 791.011.00
- Brand: CMT Orange Tools
- Product Type: Router Bit Replacement Bearing
- Diameter: 3/4"
- Bore Diameter: 12.7mm
- Plate Thickness: 4mm
- Material: Steel
Approved Applications
- Replacing worn or damaged guide bearings on CMT flush trim bits
- Upgrading guide bearings on CMT pattern routing bits
- Restoring smooth self-guiding function on rabbeting bits
- Bearing replacement on CMT profile bits used at the router table or with a handheld router
Frequently Asked Questions
What router bit types is this bearing compatible with?
This bearing is used as a guide bearing on flush trim bits, pattern bits, rabbeting bits, and profile bits. It is designed to fit CMT router bit bodies that accept a 3/4" outer diameter bearing with a 12.7mm bore.
Is there a correct orientation for reinstalling this bearing?
Yes - the bearing has a black shield that must be kept right side up to correspond with the bearing rotation during reassembly. Reversing the shield orientation can affect proper bearing function, so take note of the shield position before removal.
What does the 12.7mm bore diameter correspond to in standard sizing?
12.7mm is the metric equivalent of 1/2 inch, which corresponds to the 1/2" pilot post found on many CMT router bit bodies. This bore size ensures the bearing seats securely on the pilot without excessive play.
Can this bearing be used on a router table as well as a handheld router?
Yes - because it functions as a guide bearing that rides along a template or workpiece edge, it is suitable for use in both handheld router and router table setups, provided the router bit body accepts a 3/4" outer diameter, 12.7mm bore bearing.
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