Product Description
The CMT 791.004.00 Bearing 3/4" - 1/4" is a precision steel replacement bearing designed to restore smooth, accurate self-guiding performance to CMT router bits. With a 3/4" outer diameter and a 6.35mm bore, this guide bearing fits flush trim, pattern, rabbeting, and profile router bits, keeping cuts clean and consistent whether you are working along a template or a finished workpiece edge. Replacing a worn or damaged guide bearing with a properly sized steel bearing is one of the most effective ways to maintain routing accuracy without replacing an entire bit assembly.
Key Features
- Steel construction - provides durable, long-lasting performance under the continuous friction and rotational stress that guide bearings experience during routing operations.
- 3/4" outer diameter with 6.35mm bore - precisely sized to fit 1/4" shank CMT router bits, ensuring a secure, wobble-free fit that keeps cuts true to the template or edge being followed.
- 7mm plate thickness - matches the geometry of compatible CMT router bits so the cutting edge and guide bearing work in correct alignment, reducing tear-out and maintaining bit integrity.
- Black shield orientation matters during reassembly - the black shield must face the correct direction to correspond with bearing rotation, ensuring smooth operation and preventing premature wear after installation.
Why This Product
- Worn guide bearings cause drift, poor edge quality, and overheating - this steel replacement bearing restores the precision self-guiding action that flush trim and pattern routing depend on.
- The exact 6.35mm bore diameter and 3/4" outer diameter make this bearing a direct-fit replacement for compatible CMT router bit models, eliminating guesswork when selecting a replacement part.
- At 7mm plate thickness, this bearing maintains the correct geometry between the cutting edge and guide surface, helping protect both the workpiece and the bit during use.
- Choosing a purpose-matched steel bearing over a generic substitute helps maintain the precision tolerances that CMT router bits are designed around, supporting consistent results across repeated routing passes.
Specifications
- Manufacturer Part Number: 791.004.00
- Brand: CMT Orange Tools
- Diameter: 3/4"
- Bore Diameter: 6.35mm
- Plate Thickness: 7mm
- Material: Steel
- Product Type: Router Bit Replacement Bearing
Approved Applications
- Replacing worn or damaged guide bearings on CMT router bits
- Flush trim router bits
- Pattern router bits
- Rabbeting router bits
- Profile router bits
- Use with handheld routers and router tables
Frequently Asked Questions
What router bit bore size does this bearing fit?
This bearing has a 6.35mm bore diameter, which corresponds to a 1/4" shank router bit. It is sized specifically for CMT router bits with that bore specification.
Does the orientation of the black shield matter when reinstalling this bearing?
Yes - 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 result in poor performance or accelerated wear.
What types of router bits is this bearing used on?
This bearing is used as a guide bearing on flush trim, pattern, rabbeting, and profile router bits. It acts as the self-guiding element that rides along a template or workpiece edge to control the cutting path.
What material is this bearing made from?
This bearing is made of steel, which provides the durability and dimensional stability needed to withstand the friction and rotational forces generated during routing operations.
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