CMT Guide Bearing 1/2" OD x 1/4" Bore x 4.8mm Wide
Series 791
Guide Bearing
CMT 791.010.00 is the exact 1/2-inch outside-diameter variant in the official Series 791 bearing family. It combines a 1/4-inch bore and 4.8 mm width—equivalent to 12.7 × 6.35 × 4.8 mm—for compatible CMT bearing-guided router-bit assemblies. This separately orderable non-cutting accessory supports pattern routing, round-nose profiling, V-grooving, XTREME flush trimming, double-bearing spiral trimming, flooring, and related guided operations where the parent-tool row specifies bearing 791.010.00.
Main Product Description
CMT 791.010.00 is the exact bearing item in the official Series 791 Spare Parts and Accessories family. The North American variation row specifies a 1/2-inch outside diameter, 1/4-inch bore, and 4.8 mm width. CMT’s metric table lists the same configuration as 12.7 × 6.35 × 4.8 mm.
The bearing functions as a guide or profile-control component on compatible CMT router-bit assemblies. Verified official references include Pattern Router Bit 812.127.11B, Round Nose Router Bit 814.127.11B, 90° V-Grooving Router Bit 815.127.11B, XTREME flush-trim bits 706.127.41B and 806.127.41B, selected double-bearing spiral flush-trim bits, and compatible flooring-bit assemblies.
The bearing is separately orderable and does not automatically include the parent router bit, shield, screw, stop collar, spacer, hex key, or other assembly hardware. Related components vary by tool family and exact item row. CMT’s Series 791 safety guidance requires the black shield to remain right side up during reassembly so the shield orientation corresponds with bearing rotation.
Best Fit Applications
Product Highlights
Exact 1/2-Inch OD Variant
Item Code 791.010.00 is the official Series 791 bearing with a 1/2-inch outside diameter, 1/4-inch bore, and 4.8 mm width.
Broad Verified CMT Compatibility
Official CMT tables list this bearing with selected pattern, round-nose, V-groove, XTREME flush-trim, double-bearing spiral, and flooring-bit assemblies.
Official Reassembly Guidance
CMT specifies keeping the black shield right side up during reassembly so the shield orientation corresponds correctly with bearing rotation.
Compatibility & Installation Notes
Confirm exact Item Code 791.010.00 and dimensions 1/2 × 1/4 × 4.8 mm before installation. Use only on a compatible CMT assembly that explicitly lists this bearing. Inspect the bearing for roughness, play, shield damage, contamination, or binding; replace damaged components. Reassemble with the black shield right side up, use the exact shield, screw, stop collar, spacer, key, or other hardware specified by the parent-tool row, and confirm free bearing rotation before use. The router bit and related fastening hardware are not included.
Verified 1/2-Inch Guide-Bearing Fit for Compatible CMT Tools
CMT 791.010.00 combines a 1/2-inch outside diameter, 1/4-inch bore, and 4.8 mm width in the official Series 791 replacement-bearing format.
Verified use across multiple CMT router-bit families and the official black-shield orientation requirement complete the service-accessory record.