Nakahashi 9/16" Japanese Mortise Chisel & Bit

The Nakahashi 9/16" mortise chisel and bit is a Japanese-made tooling set that consistently outperforms comparable products in independent testing by Scott & Sargeant. Both the chisel body and auger bit are produced to exacting standards using high-quality steel, with the chisel hardened and precision hand-finished to a sharper cutting angle than the traditional English pattern — reducing cutting effort without compromising rigidity.

The auger bit features a single cutting spur and single spiral flute for efficient chip clearance. The single-spur configuration is straightforward to resharpen and cuts cleanly and quickly even in dense hardwoods.

Augers are supplied over length to suit a range of machines and may require trimming to length with a hacksaw prior to use.

Applications: mortise cutting in hardwood, mortise cutting in softwood

Key Features:

— Japanese manufacture from high-quality steel — consistent material hardness and dimensional accuracy across the tooling set
— Heat-treated and hardened chisel body — maintains edge integrity under repeated impact in production use
— Precision hand-finished chisel — tighter tolerances and a cleaner finish than mass-produced alternatives
— Sharper cutting angle than English pattern — reduced cutting effort and lower operator fatigue during extended use
— Single cutting spur on auger bit — straightforward to resharpen without specialist equipment
— Single spiral flute — efficient chip clearance, reducing heat build-up and minimising clogging in hardwoods
— Augers supplied over length — compatible with a range of mortising machines without requiring machine-specific stock
— 9/16" (14.0 mm) chisel width — dimension A — standard sizing for common mortise widths in joinery and cabinet making
— Chisel body length 98 mm (B) with 80 mm working length (B1) — adequate depth capacity for typical through and blind mortise applications