Acrow BSD Insert Holder Extension – B.BSD19-025 (Ø25–31 mm) Best Carbide 5/16" 4 Flute Stub Square End Mill – 5/16" Shank TiALN coated With an 18 TPI pitch

With an 18 TPI pitch and 60° thread angle

Part No : 4139-18R

Known for precision engineering

Long-Lasting Durability – Cobalt enrichment enhances wear resistance and lifespan

The PS chipbreaker geometry provides efficient chip evacuation

Acrow BSD Insert Holder Extension – B.BSD19-025 (Ø25–31 mm) Best Carbide 5/16" 4 Flute Stub Square End Mill – 5/16" Shank TiALN coated With an 18 TPI pitchAcrow BSD Insert Holder Extension B. BSD19 025 The Acrow B. BSD19 025 Insert Holder Extension is a precision manufactured tool designed to extend the boring capacity of Acrow BSD19 boring heads. Made from premium hardened alloy steel and precision ground to exacting tolerances, it ensures superior rigidity, balance, and concentricity for accurate boring performance. This extension is ideal for applications requiring additional reach or back boring