CMT Guide Bearing 3/8" OD x 3/16" Bore x 3.2mm Wide
Series 791
Guide Bearing
CMT 791.002.00 is the exact 3/8-inch outside-diameter variant in the official Series 791 bearing family. It combines a 3/16-inch bore and 3.2 mm width—equivalent to 9.5 × 4.76 × 3.2 mm—for compatible CMT bearing-guided router-bit assemblies. The bearing is separately orderable non-cutting hardware and must be reassembled with the black shield facing upward as specified by CMT.
Main Product Description
CMT 791.002.00 is the exact bearing item in the official Series 791 Spare Parts and Accessories family. The North American row specifies a 3/8-inch outside diameter, 3/16-inch bore, and 3.2 mm width. CMT’s metric table lists the same dimensions as 9.5 × 4.76 × 3.2 mm.
The bearing functions as a guide or profile-control component on compatible bearing-guided router bits. CMT specifically identifies 791.002.00 across the Series 7/8/939 beading-bit family and explains that fitting this smaller bearing to compatible Series 7/8/938 roundover bits creates the beading profile.
The bearing is separately orderable and does not include the router bit, bearing shield, fastening screw, or hex key. On current 7/8/939 assemblies, CMT lists shield 990.422.00, screw 990.058.00, and hex key 991.057.00 alongside bearing 791.002.00. After resharpening, CMT’s 2026 catalog recommends the undersized 791.062.00 bearing at 9.3 mm where specified.
Best Fit Applications
Product Highlights
Exact 3/8-Inch OD Variant
Item Code 791.002.00 is the official Series 791 bearing with a 3/8-inch outside diameter, 3/16-inch bore, and 3.2 mm width.
Verified Beading-Bit Reference
CMT lists this bearing throughout the Series 7/8/939 beading-bit family and uses it to create a beading profile on compatible 7/8/938 roundover bits.
Official Reassembly Guidance
CMT specifies keeping the black shield right side up during reassembly and lists the 9.3 mm 791.062.00 undersized bearing after resharpening where applicable.
Compatibility & Installation Notes
Confirm exact Item Code 791.002.00 and dimensions 3/8 × 3/16 × 3.2 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 and fastening hardware specified by the parent-tool row, and confirm free bearing rotation before use. After the parent cutter is resharpened, follow CMT’s catalog guidance on substituting undersized bearing 791.062.00 at 9.3 mm where required. The router bit, shield, screw, and hex key are not included.
Verified 3/8-Inch Guide-Bearing Fit for Compatible CMT Profiles
CMT 791.002.00 combines a 3/8-inch outside diameter, 3/16-inch bore, and 3.2 mm width in the official Series 791 replacement-bearing format.
Verified use across Series 7/8/939 beading bits, official black-shield orientation guidance, and the related after-resharpening bearing option complete the service-accessory record.