Product Description
CMT Bearing 1-3/8" - 1/2" is a precision replacement router bit bearing designed to restore smooth, accurate self-guiding performance to flush trim, pattern, rabbeting, and profile router bits. Built from steel for durability, this guide bearing serves as a direct replacement or upgrade component for CMT router bits, keeping your cuts clean and consistent along templates and workpiece edges.
Key Features
- Steel construction - provides the strength and rigidity needed to withstand the demands of repetitive routing operations, helping the bearing maintain its shape and performance over time.
- 1-3/8" outer diameter - sized to guide the bit at the correct offset from the cutting edge, giving you repeatable results when following templates or straight edges.
- 12.7mm bore diameter - engineered to fit a 1/2" shank, ensuring a secure, centered mount on compatible router bits without wobble or slop.
- 11mm plate thickness - provides the depth needed to maintain stable contact with your template or workpiece edge throughout the full cut.
- Black shield orientation requirement - keeping the black shield right side up during reassembly ensures proper alignment with bearing rotation, preserving smooth operation and extending service life.
Why This Product
- A worn or damaged guide bearing causes drift, chatter, and inaccurate cuts - replacing it with a correctly sized steel bearing restores the accuracy your router bit was designed to deliver.
- The 12.7mm bore is matched to a 1/2" shank, making this bearing a direct-fit replacement for compatible CMT router bits without requiring any modification or adapter.
- At 1-3/8" outer diameter and 11mm plate thickness, the bearing dimensions provide consistent template-following contact, which is critical for flush trim and pattern routing work where edge accuracy matters most.
- Steel construction means the bearing resists deformation under the lateral forces generated during guide-bearing routing, giving you reliable performance across multiple projects.
Specifications
- Manufacturer Part Number: 791.029.00
- Brand: CMT Orange Tools
- Product Type: Router Bit Bearing
- Diameter: 1-3/8"
- Bore Diameter: 12.7mm
- Plate Thickness: 11mm
- Material: Steel
Approved Applications
- Replacement guide bearing for flush trim router bits
- Replacement guide bearing for pattern router bits
- Replacement guide bearing for rabbeting router bits
- Replacement guide bearing for profile router bits
- Upgrade bearing for compatible CMT router bits
Frequently Asked Questions
What is the bore diameter of this bearing, and what shank size does it fit?
The bore diameter is 12.7mm, which corresponds to a 1/2" shank. This makes it a direct-fit replacement for compatible CMT router bits that use a 1/2" shank guide bearing.
What material is this bearing made from?
This bearing is made of steel, which provides the strength and lateral rigidity needed to hold up under the forces generated during template-guided and flush trim routing operations.
Is there anything important to know when reassembling the bearing onto a router bit?
Yes - be sure to keep the black shield right side up to correspond with the bearing rotation during reassembly. Incorrect orientation can affect bearing performance and longevity.
What types of router bits use this style of guide bearing?
This bearing is used as a guide bearing on flush trim, pattern, rabbeting, and profile router bits. It rides along the edge of a template or workpiece to guide the cutting action of the bit.
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