Product Description
CMT Bearing 7/8" - 3/8" by CMT is a precision steel router bit guide bearing designed to replace worn or damaged bearings on flush trim, pattern, rabbeting, and profile router bits. With an outer diameter of 7/8" and a bore diameter of 9.52mm, this replacement bearing restores smooth, self-guiding performance so your router bit can track accurately along templates and workpiece edges. Keeping a spare guide bearing on hand means less downtime and more consistent results at the router table or handheld router.
Key Features
- Steel construction - provides the durability and rigidity needed to withstand the high rotational demands of router bit guidance, reducing the chance of premature wear during repetitive routing passes.
- 7/8" outer diameter with 9.52mm bore - precisely sized to match compatible CMT router bits, ensuring a secure, wobble-free fit that translates directly into clean, accurate edge profiles.
- 7mm plate thickness - a slim, compact profile that keeps the bearing correctly positioned relative to the cutting edge, supporting flush and precise depth control along templates and straight edges.
- Black shield orientation requirement - the bearing must be reassembled with the black shield right side up to correspond with bearing rotation, ensuring proper function and longevity after replacement.
Why This Product
- A worn guide bearing causes wander, chatter, and inaccurate cuts - replacing it with a correctly sized steel bearing restores the smooth self-guiding performance your flush trim or pattern bit depends on.
- The 9.52mm bore and 7/8" outer diameter are sized specifically to fit CMT router bit shanks, eliminating the guesswork of finding a compatible replacement from a generic source.
- At 7mm plate thickness, the bearing maintains proper bit geometry after installation, so cutting depth and profile accuracy are not compromised.
- Compatible with router use both handheld and at the router table, making this a versatile replacement part for a wide range of routing applications including rabbeting, pattern routing, and flush trimming.
Specifications
- Manufacturer Part Number: 791.021.00
- Brand: CMT Orange Tools
- Product Type: Router Bit Bearing
- Outer Diameter: 7/8"
- Bore Diameter: 9.52mm
- Plate Thickness: 7mm
- Material: Steel
Approved Applications
- Replacing worn guide bearings on flush trim router bits
- Replacing worn guide bearings on pattern router bits
- Replacing worn guide bearings on rabbeting router bits
- Replacing worn guide bearings on profile router bits
- Router table routing applications requiring self-guiding bit performance
- Handheld router applications requiring accurate edge tracking
Frequently Asked Questions
What does the black shield orientation mean during reassembly?
The black shield must be kept right side up to correspond with the direction of bearing rotation when reassembling the bearing onto the router bit. Incorrect orientation can interfere with bearing function and reduce its service life.
What types of router bits is this bearing compatible with?
This bearing is used as a guide bearing on flush trim, pattern, rabbeting, and profile router bits where a 7/8" outer diameter and 9.52mm bore are required.
Can this bearing be used on both a handheld router and a router table?
Yes. This guide bearing is compatible with router bits used in both handheld routers and router table setups, making it suitable for a broad range of edge-guided routing tasks.
What are the key dimensions I need to verify before ordering this bearing?
Before replacing a guide bearing, confirm that your router bit requires a bearing with a 7/8" outer diameter, a 9.52mm bore diameter, and a 7mm plate thickness. All three dimensions must match your existing bearing to ensure a correct fit.
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