CMT Forstner Bit - 25mm Diameter, 8mm Shank, Right-Hand Rotation is a precision boring tool engineered for drilling clean, flat-bottom holes in softwood and light hardwood. Built from super strength SP steel, this 25mm bit delivers long-lasting cutting performance for cabinetry, furniture, and millwork applications - including hinge installation, shelf pin boring, and the creation of arched or oval openings at any angle. The toothed rim design at this 25mm diameter actively prevents overheating during extended cuts, keeping the bit performing cut after cut.

Key Features

• Super Strength SP Steel Construction - the blade material resists wear and maintains a sharp cutting edge through repeated use, delivering long-lasting cutting performance on softwood and light hardwood without frequent resharpening.
• 2 Precision-Ground Cutting Edges - dual cutting edges slice cleanly through the material, producing smooth flat-bottom holes with consistent depth and minimal tearout on the bore floor.
• 2 Ground Spurs (V2) - the spurs score the wood fiber ahead of the main cutting edges, defining the hole perimeter cleanly and preventing chip-out on the bore walls for a professional finish.
• Toothed Rim Design (25mm and larger) - at this diameter, the toothed rim prevents overheating during longer plunge cuts, extending bit life and maintaining cut quality even in continuous use scenarios.
• Right-Hand (RH) Rotation - compatible with standard drill presses and handheld drills, fitting into conventional tool setups without any adapter or special configuration.
• 8x30mm Shank - the 8mm round shank seats securely in a standard chuck, providing stable grip and reducing vibration for more accurate, repeatable hole placement.
• Angle-Independent Boring Capability - designed to create oval and arched openings at any angle, giving woodworkers the flexibility to cut entry points for brackets, frames, grids, and decorative niches without repositioning jigs.

Why This Product

• Flat-Bottom Hole Accuracy for Hardware Installation - the precision-balanced center point and dual ground spurs work together to keep the bit on center from entry to full depth, making hinge mortises and hardware recesses come out exactly right the first time.
• Versatile Angle Boring in One Bit - unlike standard twist bits that require a perpendicular entry, this Forstner bit can bore at any angle, making it the right tool for creating arched openings and custom niches where other bits fall short.
• Built for Repeated Use Without Performance Drop-Off - the SP steel construction is specifically chosen for long-lasting cutting performance, so the bit holds up through production runs in softwood applications, not just one-off jobs.
• Overheating Prevention at 25mm - the toothed rim on this size actively dissipates heat during deeper cuts, reducing the risk of bit damage or burn marks on the workpiece that can occur with plain-rim bits at larger diameters.

Specifications

• Manufacturer Part Number: 537.250.31
• Brand: CMT Orange Tools
• Product Type: Forstner Bit
• Diameter: 25mm
• 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 in softwood
• Hinge installation and mortising
• Shelf pin and hardware boring
• Creating arched and oval openings at any angle
• Installing brackets and straps in recessed niches
• Creating openings for frames and grids