The CMT 855.504.11 Lock Miter Router Bit from CMT is a precision-engineered joinery bit designed to produce strong, self-aligning 45 deg. miter joints for boxes, frames, stretcher bars, and right-angle assemblies. Featuring a 2" diameter, 7/8" cutting height, and 1/2" shank, this tungsten carbide-tipped bit handles solid hardwood, softwood, sheet goods, and composites with a clean, accurate cut every time. Its anti-kickback body geometry and right-hand rotation make it a reliable choice for both router table use and production-level joinery work. The same bit can also be used for parallel glue joint milling, giving woodworkers a versatile two-in-one solution for a wide range of panel and frame construction tasks.

Key Features

• Anti-Kickback Design - controls the depth of cut on each pass, reducing the risk of sudden kickback and giving the operator more confident, stable control at the router table.
• Tungsten Carbide (HW) Cutting Edges - hard-wearing carbide tips stay sharp longer through repeated cuts in hardwood, softwood, plywood, MDF, and similar materials, reducing downtime for resharpening.
• 45 deg. Miter Angle - produces precise interlocking lock miter joints that self-align during glue-up, eliminating the need for complex clamping setups when assembling boxes, frames, or parallel joints.
• 2-Flute (2-Tooth) Configuration - dual cutting edges deliver a balanced, smooth cut and help maintain consistent feed rates across varying wood species and thicknesses.
• 1/2" Shank Diameter - the full 1/2" shank provides maximum stability and reduced vibration in router table collets, resulting in cleaner joint surfaces and improved bit longevity.
• Material Thickness Range: 3/8" to 3/4" - accommodates a practical range of workpiece thicknesses, making it suitable for drawer box sides, cabinet carcasses, decorative frames, and light panel construction.
• Dual-Purpose Bit - Lock Miter and Parallel Joinery - the same single bit can mill both interlocking miter joints and parallel glue joints by simply repositioning the workpiece, maximizing value from one tooling investment.
• Right-Hand (RH) Rotation - standard right-hand rotation is compatible with all conventional routers and router tables, requiring no special equipment or adapters.

Why This Product

• Lock miter joints produced with this bit are self-aligning and self-clamping during assembly, which dramatically simplifies glue-up of boxes, frames, and corner joints without the need for elaborate jig setups or corner clamps.
• The anti-kickback body geometry limits the amount of material removed per pass, making this bit safer and more predictable to run on a router table - especially valuable when working with hardwoods or wider stock near the upper end of the 3/4" maximum thickness.
• By repositioning the workpiece, the same bit mills parallel glue joints - so one bit covers both 45 deg. miter corner work and straight panel edge joinery, reducing the number of specialty bits needed in the shop.
• The 2" cutting diameter and 7/8" cutting height, combined with the 1/2" shank, are sized for a stable, vibration-free cut in a standard router table setup, producing clean, tight-fitting joints that need minimal hand fitting before glue-up.

Specifications

• Manufacturer Part Number: 855.504.11
• Brand: CMT Orange Tools
• Angle: 45 deg.
• Diameter: 2"
• Cutting Height: 7/8"
• Total Length: 2-3/8"
• Shank: 1/2"
• Maximum Material Thickness: 3/8" to 3/4"
• Number of Teeth: 2
• Material: HW (Tungsten Carbide)
• Rotation: Right-Hand (RH)

Approved Applications

• Box construction - corners, sides, and lids using interlocking 45 deg. lock miter joints
• Stretcher bar fabrication with self-aligning corner joints
• Picture frames, shadow boxes, and decorative frames requiring clean mitered corners
• Right-angle panel and carcass joinery for cabinet and furniture construction
• Parallel glue joint milling for panel edge-to-edge lamination
• Drawer box side construction within the 3/8" to 3/4" material thickness range