CMT Forstner Bit 28mm with 8mm Shank is a precision boring tool engineered in super strength SP steel for drilling clean, flat-bottom holes in softwood and light hardwood. With a 28mm cutting diameter and right-hand rotation, this Forstner bit handles hinge installations, shelf pin bores, cabinet hardware cutouts, and arched or oval openings at any angle - delivering repeatable accuracy whether you are working at the drill press or with a handheld drill. The toothed rim design at this diameter helps prevent overheating during extended cuts, making it a reliable choice for high-volume woodworking and cabinetry work.

Key Features

• Super Strength SP Steel Construction - provides long lasting cutting performance and durability through repeated use in softwood boring applications, reducing the frequency of bit replacement.
• 2 Precision-Ground Spurs - score the wood fiber ahead of the main cutting edges so bore walls come out clean and chip-free, which is essential for visible cabinetry cutouts and hardware installations.
• 2 Precision-Ground Cutting Edges - deliver accurate flat-bottom holes in a single plunge, giving you the clean, consistent depth needed for hinge cups, shelf pins, and recessed hardware.
• Toothed Rim Design (28mm diameter) - at this larger diameter, the toothed rim actively prevents overheating during deeper or longer cuts, extending both bit life and cut quality.
• Right-Hand Rotation (RH) - compatible with standard drill press and handheld drill chucks, so no special tooling or adapters are needed for everyday workshop use.
• 8x30mm Shank - fits a wide range of drill press and handheld drill chuck sizes, providing a secure grip and minimizing vibration during boring for more precise hole placement.
• Cuts Flat-Bottom Holes at Any Angle - supports oval and arched openings as well as straight plunge cuts, giving woodworkers flexibility to create niches, bracket/strap installations, and frame or grid recesses in a single bit.

Why This Product

• Flat-Bottom Accuracy for Hardware Installation - the precision-balanced center point and two ground cutting edges work together to produce consistently flat hole bottoms, which is critical when seating hinge cups or shelf hardware flush with the wood surface.
• Long Lasting SP Steel for Repeat Production Work - super strength steel construction means this bit holds its edge through high-cycle softwood boring, making it suitable for cabinet shops and production environments where bit longevity directly affects output quality.
• Versatile Angle Capability for Creative Woodworking - because this Forstner bit can drill at any angle, it opens up design possibilities like arched openings and oval cutouts that standard twist bits cannot achieve, all with a single tool.
• 28mm Diameter Covers Common Cabinet Hinge and Hardware Sizes - the 28mm bore is a standard dimension for European-style cabinet hinges and a variety of recessed hardware, so this bit addresses one of the most frequent flat-bottom drilling needs in furniture and cabinet construction.

Specifications

• Manufacturer Part Number: 537.280.31
• Brand: CMT Orange Tools
• Bit Type: Forstner Bit
• Diameter: 28mm
• Total Length: 3-35/64 in.
• Shank: 8x30mm
• Number of Cutting Edges: 2
• Number of Spurs: 2
• Blade Material: Super Strength (SP) Steel
• Rotation: Right-Hand (RH)

Approved Applications

• Drilling precise flat-bottom holes for hinge installation
• Boring holes for shelf pins and recessed hardware
• Creating arched and oval openings at any angle
• Installing brackets and straps with recessed niches
• Creating recesses for frames and grids
• Cabinet hardware installation in softwood