CMT 15° Chamfer Bit 31/32-Inch Diameter 1/2-Inch Shank
15° HW
Chamfer Router Bit
CMT 857.503.11 is the exact 15° bearing-guided chamfer bit with a verified 31/32-inch (24.61 mm) cutting diameter, 7/8-inch (22.23 mm) cutting length, 1/2-inch (12.7 mm) shank, two carbide-tipped cutting edges, and right-hand rotation.
Main Product Description
CMT 857.503.11 is one exact Item Code in the official 8/957 chamfer-router-bit family. The live variation row specifies a 15° angle, 31/32-inch (24.61 mm) diameter, and 7/8-inch (22.23 mm) cutting length.
The verified overall length is 2-51/64 inches (70.64 mm), with a 1/2-inch (12.7 mm) shank, HW carbide cutting material, and right-hand rotation. Supporting manufacturer data identifies two carbide-tipped cutting edges and CMT’s orange PTFE non-stick coating.
CMT describes the family for clean bevels and chamfers in edge work, aligned multi-sided forms, decorative projects, and larger architectural components. Exact selection should be based on the official 31/32-inch diameter rather than rounded one-inch reseller naming.
Best Fit Applications
Product Highlights
Verified 15° Geometry
The exact CMT row specifies a 15° chamfer angle and 31/32-inch (24.61 mm) diameter.
Z2 HW Cutting Edges
Two carbide-tipped cutting edges provide the documented right-hand profile configuration.
Serviceable Bearing System
The official row identifies the matching shield, bearing, screw, and hex-key references.
Compatibility & Professional-Use Notes
Confirm exact Item Code 857.503.11, its verified 31/32-inch (24.61 mm) diameter, and a compatible 1/2-inch (12.7 mm) interface. Inspection, installation, and operation are for qualified personnel using appropriate professional equipment, guarding, workholding, extraction, and current CMT and machine documentation. Replace bearing-system components only with verified compatible parts.
Verified 15° Chamfer Geometry for Professional Edge Work
CMT 857.503.11 combines a 15° angle, 31/32-inch (24.61 mm) diameter, 7/8-inch (22.23 mm) cutting length, and 1/2-inch (12.7 mm) shank.
The Z2 HW carbide geometry, right-hand rotation, bearing guide, and serviceable spare-part system define the exact variant.