DIN1869 Extra Length Fully Ground HSS Straight Shank Long Twist Drill Bit

Core Design & Material Advantages

100% Strict DIN 1869 Standard Compliance (Core Differentiator)

• Perfect interchangeability with all DIN 1869-compliant deep hole drilling equipment and tool holders worldwide

• Unified ultra-long flute length, overall length, and shank diameter tolerances across every batch

• Guaranteed compatibility with European and global industrial production lines, eliminating tooling adaptation costs

• Industry-standard length classification: longer than DIN338 (jobber) and DIN340 (extra long), for maximum reach in deep hole applications

Premium Industrial-Grade HSS Base Material

• Superior Red Hardness: Maintains cutting edge sharpness at temperatures up to 550°C, ensuring consistent performance during continuous deep hole drilling

• Enhanced Rigidity & Flex Resistance: Optimized core thickness and flute geometry minimize flex and vibration, reducing breakage risk in ultra-long drilling operations

• Optimal Cost-Performance Ratio: Balances professional industrial performance with competitive pricing, perfect for bulk industrial use and high-turnover inventory

Precision Fully Ground CNC Manufacturing

• Ultra-tight concentricity and minimal radial runout for straight, round, burr-free ultra-deep holes

• Consistent batch-to-batch performance, critical for automated deep hole production lines to reduce scrap rates

• Smooth, polished flute surface for unobstructed chip evacuation, even in holes up to 15x diameter depth

• Uniform flute geometry for stable chip removal, preventing clogging in deep, narrow bores

Optimized Deep Hole Drilling Geometry

• 118°/135° Split Point (Standard 135°): Self-centering design eliminates drill wander, ensuring precise hole alignment in ultra-deep drilling

• High Helix Flute Design: Optimized for fast, efficient chip removal in deep holes, preventing chip packing and heat buildup

• Reinforced Straight Shank: Uniform straight shank for maximum compatibility with deep hole drilling machines, lathes, and CNC machining centers

Extra Length (Ultra-Long) Series Design

• Extended overall length (far exceeding DIN340) enables drilling of ultra-deep holes in large workpieces, mold bases, and structural components

• Optimized length-to-diameter ratio balances maximum reach and rigidity, minimizing flex and breakage in long-length operations

• Ideal for deep hole drilling in large machinery parts, mold cavities, and aerospace components