5Pcs Extra Long 67 HRC PM-HSS Twist Drill Bits for Metalworking, 118° Self Centering, 4 Flutes & Straight Shank, for Steel Drilling Deep Hole (4.7mm)

★★★★★ 4.5 114 reviews

US$22.00
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US$22.00
Price when purchased online
Free shipping Free 30-day returns

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Management number 228514034 Release Date 2026/05/31 List Price US$22.00 Model Number 228514034
Category
  • Unmatched Depth & Precision: Conquer deep-hole drilling challenges in steel, alloy, and stainless steel with our extra-long design. Choose from 2mm to 13mm in precise 0.1mm increments for the perfect fit, ensuring professional-grade results every time.
  • Hardness & Wear Resistance – Crafted from Powder Metallurgy High-Speed Steel (PM HSS) with a hard AITiSiN coating, achieving 67 HRC. This extreme hardness allows the bits to cut through hardened steel, stainless steel, and alloys while lasting significantly longer than standard drills.
  • Designed for Smooth, Efficient Drilling: The 118° self-centering point starts cleanly and reduces walking, while the optimized 4-flute spiral design ensures efficient chip evacuation. This means cooler operation, less binding, and faster, smoother holes.
  • Professional-Grade Performance for All: Fully ground with H7 tolerance, these bits deliver exceptional accuracy for demanding CNC, milling, and drill press applications. Whether you're a machinist, fabricator, or serious DIYer, achieve workshop-quality precision at home.
  • Complete Deep-Hole Solution Set: This practical 5-piece set provides incredible versatility for your most demanding projects. Custom sizes are also available, making this your go-to source for specialized drilling needs in metal, titanium, and aluminum.
ASIN B0G6DZWJWJ
Model with AITiSiN Coating
Brand Name HeeHoo
Shank Type Straight
Part Number PM-HSS Twist Drill Bits for Metalworking
Manufacturer HeeHoo
Material Type High Speed Steel (HSS)
Tool Flute Type Spiral
Number of Pieces 5
Included Components 5 x High-Speed Steel Twist Drill Bit

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114 ratings | 47 reviews
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