Acrow BSD31 – BSD Fine Boring Head (Ø32–42 mm Range) Somta Series 545 – No. 12 UNC HSS Gun Nose Tap (Standard) this 38mm bushing securely holds

this 38mm bushing securely holds the broach in place while directing it through the machined hole

Large Cutting Diameter (17mm) – Perfect for large boreholes in fabrication

Meeting ANSI/ASME B1

The 100 mm gauge length offers a versatile setup ideal for a wide range of milling

Insize Imperial 0-12" Dial Caliper

Acrow BSD31 – BSD Fine Boring Head (Ø32–42 mm Range) Somta Series 545 – No. 12 UNC HSS Gun Nose Tap (Standard) this 38mm bushing securely holdsAcrow BSD31 BSD Fine Boring Head (3242 mm Range) The Acrow BSD31 is a precision engineered BSD Fine Boring Head for use in medium to large diameter boring setups. Designed for boring ranges between 3242 mm, it delivers stable and precise performance through its hardened alloy steel construction and precision ground geometry. This extension increases boring flexibility while preserving accuracy and repeatability under heavy cutting conditions.