CMT 5/8" Forstner Bit by CMT is engineered for drilling clean, precise flat-bottom holes in softwood, making it the go-to boring tool for hinge installation, shelf pin drilling, and cabinet hardware fitting. With a 3/8" shank and super strength SP steel construction, this right-hand rotation bit delivers repeatable accuracy whether you are working at a drill press or using a handheld drill. The precision-balanced centre point and 2 ground spurs ensure chip-free entry, clean bore walls, and consistent results on every plunge - including oval openings and arched cuts at any angle.

Key Features

• Super Strength SP Steel Construction - provides the durability needed to maintain sharp cutting edges through repeated use in softwood applications, reducing the need for frequent resharpening or replacement.
• Precision-Balanced Centre Point - keeps the bit on-centre from the first moment of contact, producing repeatable flat-bottom holes with no walking or drift, even when boring at an angle.
• 2 Ground Spurs (V2) - score the wood fibers ahead of the main cutting edges, resulting in clean, splinter-free hole perimeters and smooth bore walls suited to visible joinery and hardware installation.
• Standard Rim Design - provides better guidance and lateral stability at this 5/8" diameter, keeping cuts true and reducing chatter during the boring stroke.
• 3/8" x 30mm Shank - fits standard drill press chucks and most handheld drill chucks, giving you versatile compatibility across common shop setups.
• Right-Hand Rotation (RH) - matches the forward cutting direction of all standard drill presses and handheld drills, so there is no need for any special tool configuration.
• 90mm (3-35/64") Total Length - provides enough reach for typical hinge mortises, shelf pin bores, and cabinet hardware recesses without excessive overhang that could affect stability.
• Capable of Oval and Arched Openings at Any Angle - the geometry of this Forstner bit allows angled plunges, letting you create decorative arched and oval cutouts that other drill bits cannot produce.

Why This Product

• Flat-bottom accuracy for hardware-critical work - the precision-balanced centre point and 2-spur design work together to produce truly flat-bottomed holes, which is essential when seating hinges, shelf pins, and cabinet hardware flush and level.
• Clean results with no tear-out - the 2 ground spurs score the wood grain before the cutters engage, which means the hole perimeter stays clean and splinter-free - a direct benefit when the hole will be visible or the workpiece surface cannot be sanded after boring.
• Versatile cutting geometry for creative joinery - unlike standard twist or spade bits, this Forstner bit can bore overlapping holes and plunge at angles, letting you create arched and oval openings in softwood without additional routing or shaping steps.
• Standard rim guidance suited to this diameter - at 5/8", the standard rim design provides the wall-guidance benefit that this size range requires, keeping the cut straight and reducing the lateral drift that can misalign hardware recesses.

Specifications

• Manufacturer Part Number: 537.158.31
• Brand: CMT Orange Tools
• Product Type: Forstner Bit
• Diameter: 5/8"
• Total Length: 3-35/64" (90mm)
• Shank: 3/8 x 30mm
• Number of Spurs: 2
• Number of Cutting Edges: 2
• Rim Type: Standard Rim
• 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 Cabinet Hardware Drilling
• Creating Arched and Oval Openings at Any Angle
• Installing Cabinet Hardware