Product Description
The CMT 791.030.00 Bearing 1-1/8" - 8mm is a precision replacement guide bearing designed to restore smooth, accurate self-guiding performance to CMT router bits. Built from steel with a 1 1/8" outer diameter and an 8mm bore, this ball bearing fits flush trim bits, pattern bits, rabbeting bits, and profile bits - making it a practical solution for woodworkers who need to maintain their routing tools without replacing entire bit assemblies.
Key Features
- Steel construction - provides the durability needed to withstand repeated routing passes and maintain consistent guidance along templates and workpiece edges.
- 1 1/8" outer diameter with 8mm bore - matches the original CMT bearing dimensions precisely, ensuring a correct fit when replacing worn or damaged guide bearings on compatible router bits.
- 9.53mm cutting depth and 8.5mm plate thickness - these dimensions correspond directly to the original bearing profile, preserving the cutting geometry of your router bit after replacement.
- Black shield orientation matters during reassembly - the shield must be kept right side up to correspond with bearing rotation, helping maintain proper bearing function and longevity after installation.
Why This Product
- Replacing a worn guide bearing rather than an entire router bit saves cost - this bearing restores flush trim, pattern, rabbeting, and profile bits to full working condition with one small part.
- The 8mm bore dimension is a common fit for CMT router bits, making this bearing a practical stock item for shops that run CMT tooling regularly and want to minimize downtime between jobs.
- Precise dimensional specs - 1 1/8" diameter, 8mm bore, 9.53mm cutting depth, and 8.5mm plate thickness - mean the bearing matches the original geometry without guesswork, so routing accuracy is preserved after the swap.
- Steel construction stands up to the friction and heat generated during self-guided routing operations, offering a reliable service life when the bearing is correctly oriented and installed.
Specifications
- Manufacturer Part Number: 791.030.00
- Brand: CMT Orange Tools
- Product Type: Router Bit Bearing
- Diameter: 1 1/8"
- Bore Diameter: 8mm
- Cutting Depth: 9.53mm
- Plate Thickness: 8.5mm
- 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
- Use with handheld routers and router tables
Frequently Asked Questions
Which types of router bits does this bearing fit?
This bearing is used as a guide bearing on flush trim bits, pattern bits, rabbeting bits, and profile bits. Always verify the bore diameter (8mm) and outer diameter (1 1/8") match your specific bit before installing.
Does the orientation of the black shield matter during installation?
Yes - the black shield must be kept right side up to correspond with the bearing rotation during reassembly. Installing it in the wrong orientation can affect bearing function and reduce service life.
What material is this bearing made from?
This bearing is made of steel, which provides the strength and wear resistance needed for repeated self-guided routing passes along templates and workpiece edges.
Can this bearing be used on a router table as well as a handheld router?
Yes - guide bearings of this type are compatible with both handheld router and router table setups, provided the router bit itself is designed for the configuration you are using.
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