Irwin Marples Wood Boring Forstner Drill Bit 1966939 2-1/8 Inch (High Speed Steel Carbon Woodworking Precision Flat Bottom Pocket Holes Cabinet Making)

Irwin Marples 1966939 2-1/8-Inch Wood Boring Forstner Drill Bit

The Irwin Marples 1966939 2-1/8-inch wood boring Forstner drill bit cuts clean, precise flat-bottomed blind holes, pocket holes, and overlapping mortises in hardwoods, softwoods, and cabinet panels. Constructed from hardened high-speed carbon steel with ultra-sharp cutting teeth and optimized cutting angles, this precision woodworking bit slices through timber fibers significantly faster than conventional spade or twist bits. Engineered with a reduced 0.375-inch shank designed to fit 3/8-inch and larger drill presses and portable drills, it equips fine woodworkers, cabinetmakers, and furniture builders with splinter-free edge boring and superior dimensional accuracy.

Best Used For:

Fine Cabinetry and Furniture Pocket Boring: Slicing smooth, flat-bottomed recess holes for concealed cabinet hinges, dowel joinery, and hardware cup installations.
Custom Woodworking and Edge Drilling: Boring overlapping holes, angled pocket holes, and partial blind mortises in solid hardwood tabletops and panels without wandering.
Drill Press Wood Component Fabrication: Executing clean perpendicular wood-boring operations using drill presses and portable drills equipped with 3/8-inch or larger chucks.

Key Performance & Safety Features

Ultra-Sharp Rim Cutting Edge: Outer knife edge scores wood grain cleanly prior to internal excavation, ensuring splinter-free hole perimeters.
Optimized Cutting Angles: Specialized tooth geometry maximizes material removal rates while minimizing frictional heat buildup during deep plunges.
Flat-Bottom Hole Geometry: Precision-milled base creates completely flat blind holes essential for secure hardware seating and flat-bottom joinery.
Reduced 3/8-Inch Shank Design: Standardized 0.375-inch shank diameter accommodates 3/8-inch and larger drill press chucks and handheld drills.
High-Speed Carbon Steel Alloy: Tough carbon steel metallurgy maintains sharp cutting edges through extended cabinetry and furniture production runs.

What's Included

(1) Irwin Marples 2-1/8-Inch Wood Boring Forstner Drill Bit (OEM Model: 1966939)

Technical Specifications

Pro-Tip: When boring large 2-1/8-inch flat-bottom holes in dense hardwoods, use a drill press set to a moderate RPM (around 500 to 800 RPM) and feed the bit slowly; backing the bit out periodically clears wood chips and prevents scorching the workpiece walls.