The CMT 537.500.31 Forstner Bit delivers precision flat-bottom boring in softwood with a 50mm cutting diameter and a 10x30mm shank. Engineered from super strength SP steel, this right-hand rotation bit is built for long-lasting cutting performance - whether you are plunging clean hinge pockets, drilling shelf pin cavities, or carving arched and oval openings at any angle. With 2 precision-ground spurs and 2 cutting edges working in tandem, the bit produces smooth, chip-free walls and consistently flat floors in each bore.

Key Features

• Super Strength (SP) Steel Construction - delivers long-lasting cutting performance and resists wear during repeated use in softwood applications, reducing the need for frequent bit replacement.
• 50mm Cutting Diameter - provides a large, precise bore suited for hinge cup installation, bracket niches, and frame or grid recesses where smaller bits simply cannot reach.
• 2 Precision-Ground Spurs (V2) - score the wood fiber ahead of the main cutting edges, producing clean bore walls free of tear-out and splintering.
• 2 Cutting Edges (Z2) - work in balance to shear material evenly, creating flat-bottom holes with consistent depth and surface quality in a single plunge.
• 10x30mm Shank - fits drill press chucks and handheld drill chucks with adequate capacity, providing a secure, vibration-reducing grip during deep boring passes.
• Right-Hand Rotation (RH) - compatible with standard drill press and handheld drill operation, so no special tooling or chuck adapters are required.
• Flat-Bottom Boring Geometry - allows overlapping holes and angled entry cuts, making it possible to create oval openings, arched cutouts, and recesses at any angle that a standard twist or spade bit cannot achieve.

Why This Product

• Clean results in softwood boring tasks - the combination of 2 ground spurs and 2 cutting edges means you get flat, smooth-floored holes with minimal cleanup, which matters when fitting hardware like hinges, brackets, or frame straps where surface quality directly affects fit.
• Versatile geometry for complex cuts - because Forstner bits can bore overlapping and angled holes, this 50mm bit lets you create arched openings, oval cutouts, and installation niches in positions that are impossible with conventional drill bits.
• Large 50mm diameter opens up installation options - at 50mm, this bit handles larger hinge cups, cable grommets, and bracket recesses in a single pass, eliminating the need to stack smaller bores or use a jigsaw for finish work.
• SP steel durability extends service life - super strength steel construction means the cutting edges and spurs hold their ground longer during high-volume or repeated softwood drilling, delivering more usable holes per sharpening cycle.

Specifications

• Manufacturer Part Number: 537.500.31
• Brand: CMT Orange Tools
• Product Type: Forstner Bit
• Diameter: 50mm
• Total Length: 3-35/64"
• Shank: 10x30mm
• 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
• Creating hinge cup pockets and hardware recesses
• Installing brackets, straps, frames, and grids
• Creating oval and arched openings at any angle
• Boring niches for cabinet hardware installation