The CMT 537.476.31 Forstner Bit is a 1 7/8" diameter boring tool engineered for drilling precise, clean flat-bottom holes in softwood and light hardwood. Built from super strength SP steel with a toothed rim design that resists overheating during extended use, this right-hand rotation bit delivers repeatable accuracy whether you are installing cabinet hinges, fitting shelf pins, or cutting arched and oval openings at any angle. With a 3/8" shank and 90mm overall length, it is compatible with both drill presses and handheld drills, making it a versatile addition to any woodworking shop.

Key Features

• Toothed Rim Design (diameters >= 25mm) - dissipates heat during deeper bores, reducing the risk of burning or scorching softwood and light hardwood compared to standard rims, which tend to overheat at larger diameters.
• Precision-Balanced Centre Point - keeps the bit locked on target from the moment it contacts the workpiece, delivering consistent, repeatable hole placement without wandering or walking across the surface.
• 2 Ground Spurs (V2) - score the wood fibers ahead of the main cutting edges, producing clean, chip-free bore walls - critical for visible joinery, hinge pockets, and hardware installations where surface quality matters.
• Super Strength SP Steel Construction - provides durable cutting edge retention through repeated use in softwood drilling applications, reducing the frequency of resharpening during production runs.
• 3/8" x 30mm Shank - fits standard drill press chucks and handheld drill chucks widely available in woodworking setups, making it easy to integrate without adapters.
• Right-Hand (RH) Rotation - matches the standard rotation direction of virtually all corded and cordless drills and drill presses, so there is no setup change or special configuration required.
• 90mm (3 35/64") Overall Length - provides sufficient reach for hinge mortises, deep hardware bores, and angled entry cuts without excessive bit overhang that could reduce stability.

Why This Product

• The toothed rim specifically engineered for diameters at or above 25mm solves the common overheating problem that standard-rim Forstner bits develop at larger sizes - meaning cleaner cuts and longer bit life without frequent pauses to let the bit cool.
• At 1 7/8" diameter, this bit covers one of the most commonly required sizes for European-style cabinet hinge cup boring and larger shelf pin hardware, reducing the need for multiple bits across a single project.
• The combination of a precision-balanced centre point and 2 ground spurs gives woodworkers the control needed to plunge at angles for arched or oval openings - not just straight-down bores - without tear-out or drift.
• SP steel construction and a toothed rim make this bit suitable for repeated production use in softwood, where lower-grade bits would lose their edge quickly and require frequent replacement.

Specifications

• Manufacturer Part Number: 537.476.31
• Brand: CMT Orange Tools
• Bit Type: Forstner Bit
• Diameter: 1 7/8"
• Total Length: 3 35/64" (90mm)
• Shank: 3/8 x 30mm
• Number of Spurs: 2 (V2)
• Number of Cutting Edges: 2
• Rim Type: Toothed rim (>= 25mm)
• Blade Material: Super Strength SP Steel
• Rotation: Right-Hand (RH)

Approved Applications

• Drilling precise flat-bottom holes in softwood
• Hinge cup boring and hinge installation
• Shelf pin and hardware hole drilling
• Cabinet hardware installation
• Creating oval and arched openings at any angle