Sumitomo MLDH0800L5 Hex Shank Microlong Drill Bit

Sumitomo MLDH0800L5 Hex Shank Microlong Drill Bit is a solid carbide micro long drill with a 0.80 mm diameter, designed for precise, deep-hole work in very small bore sizes. It belongs to Sumitomo Electric Hardmetal’s MLDH micro-long family, which employs an oil-hole design for through-coolant delivery and a geometry optimized for rigidity and efficient chip evacuation in deep drilling. The MLDH0800L5 variant lists an overall length of 50.0 mm and a 5D hole-depth designation (L5); Sumitomo’s MLDH lineup includes 2D, 5D, 12D, 20D and 30D depths to suit different reach and rigidity requirements. The hex shank provides a secure interface with compatible toolholders, helping minimize slippage at high speeds. This micro drill is suitable for producing consistent, clean micro-holes in high-precision components where tight tolerances are essential.