Product Description
CMT Replacement Router Bit Bearing - 5/8" Diameter, 3/16" Bore is a precision steel guide bearing designed to restore smooth, accurate self-guiding performance to CMT router bits. Whether you are replacing a worn bearing on a flush trim bit, a pattern bit, a rabbeting bit, or a profile bit, this direct replacement keeps your router bits cutting cleanly along templates and workpiece edges. The steel construction and precise dimensions make this a reliable choice for both router table and handheld router use.
Key Features
- Steel construction - provides durability and resistance to the friction and heat generated during routing, helping the bearing hold up through repeated use on demanding projects.
- 5/8" outer diameter - matches the original bearing size on compatible CMT router bits, ensuring a correct fit without modification and maintaining proper cutting depth and edge alignment.
- 4.76mm bore diameter - engineered to fit the bit shaft precisely, eliminating play or wobble that could cause inaccurate cuts or template drift.
- 5mm plate thickness - maintains the correct offset geometry of the router bit so that cutting profiles and depths remain consistent after a bearing swap.
- Black shield orientation - the black shield must be kept right side up to correspond with bearing rotation during reassembly, ensuring the bearing seats and spins correctly after installation.
Why This Product
- A worn or seized guide bearing causes drift, burning, and inaccurate profiles - replacing it with a correctly sized steel bearing restores the bit to like-new tracking performance along templates and edges.
- The 5/8" outer diameter and 4.76mm bore are matched to CMT router bit specifications, making this a direct swap rather than a generic approximation that might require shimming or adapting.
- With a 5mm plate thickness held to spec, the bearing preserves the intended cutting geometry of flush trim, pattern, rabbeting, and profile bits - so your first cut after replacement is as accurate as the last cut before the old bearing failed.
- Steel construction keeps the bearing performing under the rotational speeds and lateral pressures typical of router bit guiding applications, reducing the frequency of replacement over time.
Specifications
- Manufacturer Part Number: 791.018.00
- Brand: CMT Orange Tools
- Product Type: Router Bit Bearing
- Diameter: 5/8"
- Bore Diameter: 4.76mm
- Plate Thickness: 5mm
- Material: Steel
Approved Applications
- Replacing worn or damaged guide bearings on CMT router bits
- Flush trim bit bearing replacement
- Pattern bit guide bearing replacement
- Rabbeting bit bearing replacement
- Profile bit guide bearing replacement
- Use with handheld routers and router tables
Frequently Asked Questions
How do I know if this bearing fits my CMT router bit?
This bearing has a 5/8" outer diameter, a 4.76mm bore diameter, and a 5mm plate thickness. Check your existing bearing or your CMT bit documentation to confirm these dimensions match before installing. It is designed as a replacement bearing for compatible CMT router bits including flush trim, pattern, rabbeting, and profile styles.
Is there anything important to know before reassembling the bearing onto the bit?
Yes - the black shield on the bearing must be kept right side up so that it corresponds with the bearing rotation direction during reassembly. Incorrect orientation can affect how the bearing seats and spins, so pay attention to the shield position before tightening the bit back together.
Can this bearing be used on a router table as well as a handheld router?
Yes. Because this is a guide bearing that mounts on the router bit itself rather than the router or table, it functions the same way whether the bit is used in a handheld router or mounted in a router table. The bearing guides the bit along the template or workpiece edge in either setup.
What causes a router bit guide bearing to wear out and need replacement?
Guide bearings are in constant contact with templates and workpiece edges during routing, and they spin at high speed under lateral pressure. Over time, this causes the bearing to become rough, noisy, or seized. A worn bearing can cause burning on the workpiece edge, inaccurate profiles, or template drift - replacing it with a correctly sized steel bearing restores accurate self-guiding performance.
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