CMT Bearing 1/4" - 1/8" by CMT is a precision steel replacement bearing designed to keep your router bits running true and smooth. This compact guide bearing is engineered for use with flush trim, pattern, rabbeting, and profile router bits, restoring accurate self-guiding performance when worn bearings cause drift or imprecise cuts. Whether you are refreshing a well-used bit or upgrading an existing setup, this ball bearing delivers the reliable rotation needed for clean, consistent results on a router or router table.

Key Features

• Steel construction - provides the strength and durability needed to withstand continuous contact with workpiece edges and templates during demanding routing operations.
• 1/4" outer diameter - fits precisely into compact routing profiles where a small-footprint bearing is required, maintaining tight tolerances for accurate edge-following.
• 3.17mm bore diameter - sized to seat securely on the bit pilot, minimizing wobble and keeping the cut line consistent along the full length of the pass.
• 2.8mm plate thickness - a slim profile that fits flush within the bit assembly, keeping the bearing properly seated and aligned without interfering with bit geometry.
• Black shield design - must be kept right side up to correspond with bearing rotation during reassembly, ensuring proper directional function and preventing premature wear.

Why This Product

• Restores accurate self-guiding on worn router bits - replacing a degraded bearing can bring a flush trim or pattern bit back to factory-level precision, saving the cost of a full bit replacement.
• Compact 1/4" diameter with a 3.17mm bore keeps the bearing properly scaled for smaller routing profiles, so it seats correctly without requiring modification to the bit assembly.
• Compatible with a wide range of CMT bit types - flush trim, pattern, rabbeting, and profile bits all rely on guide bearings, making this a versatile replacement to keep on hand.
• Steel construction means the bearing resists the mechanical stress of continuous edge contact, holding up through repeated passes without deforming or losing rotational smoothness.

Specifications

• Manufacturer Part Number: 791.035.00
• Brand: CMT Orange Tools
• Product Type: Router Bit Bearing
• Outer Diameter: 1/4"
• Bore Diameter: 3.17mm
• Plate Thickness: 2.8mm
• Material: Steel

Approved Applications

• Replacing worn or damaged guide bearings on CMT router bits
• Flush trim bit guide bearing replacement
• Pattern bit guide bearing replacement
• Rabbeting bit guide bearing replacement
• Profile bit guide bearing replacement
• Use with a router or router table