Morse Taper Shank Drill Bit: The Comprehensive B2B Sourcing Guide to DIN 345, HSS Metallurgy & Global Procurement Trends

Morse taper sizes are standardized based on exact taper angles and gauge diameters at the wide end of the taper. As a practical procurement guide: MT1 typically encompasses 5.0 mm to 14.0 mm drilling diameters; MT2 spans 14.25 mm to 23.0 mm; MT3 accommodates 23.25 mm to 31.75 mm; MT4 covers 32.0 mm to 50.5 mm; and MT5 ranges up to 76.0 mm and beyond. Our engineering team can provide dimensional drawings confirming standard DIN 345 shank specifications or recommend appropriate Morse taper reduction sleeves and extension sockets.

For standard carbon structural steels, mild alloy steels, and grey cast irons with tensile strength below 850 N/mm², our fully ground HSS 6542 (equivalent to AISI M2) provides an optimal price-to-performance ratio. When working with austenitic stainless steels (such as AISI 304, 316), heat-resistant steels, or abrasive alloys exceeding 900 N/mm² that suffer from rapid work-hardening, our M35 Cobalt (5% Co, 65–67 HRC) or TiAlN coated bits are required to prevent cutting lip thermal degradation and friction burnout.

Slipping occurs when the mating surfaces between the male taper shank and machine spindle socket lose frictional self-holding contact. Common culprits include axial runout, contaminated tapers (fine chips or grease film), or poorly fitted taper angles. When slippage starts, dynamic rotational torque transfers solely onto the driving tang, leading to sudden shear fatigue or tang fracture. Jiangsu WRD Tools Co., Ltd. CNC-grinds shanks to micron-level taper angle accuracy (AT4/AT5 class) to guarantee total surface contact.

Yes. As an Intertek-verified source manufacturer with over 150 skilled staff, we produce custom DIN 345 and DIN 341 Morse taper drill bits with straight or helical internal oil-hole channels. These allow high-pressure coolant (up to 70 bar) direct delivery to the cutting lip, dramatically clearing chips and multiplying tool life during deep hole drilling.

For standard DIN 345 Morse taper bits in HSS M2, our typical MOQ starts at 100 pieces per diameter, while specialized M35 cobalt or custom-coated runs start from 50 to 100 pieces. We provide complimentary high-precision laser marking (brand name, DIN standard, size, batch code) on the shank, paired with heavy-duty protective plastic tubes, corrosion-inhibiting VCI sleeves, or custom wooden/aluminum storage cases. Mass production lead times are typically 25 to 35 days.