230-Piece HSS Drill Kit (1-13mm) – Heavy-Duty Blue Metal Storage

Specification:
Standard: DIN 338 (Metric Standard)
Material: HSS-E M35 (5% Cobalt) / HSS M2 (Standard) / HSS 4341 available
Total Piece Count: 230 Pieces
Size Range: 1.0mm to 13.0mm
Detailed Quantities:
- 1.0mm – 8.5mm: 10pcs each size (in 0.5mm increments)
- 9.0mm – 13.0mm: 5pcs each size (in 0.5mm increments)
- Special Sizes: 10pcs each of 3.2mm and 4.2mm (Precision sizes for pre-tapping)
Shank Type: Straight Shank (Cylindrical) / Tri-flat Shank
Point Angle: 118° Standard Point / 135° Split Point (Self-Centering)
Manufacturing: Fully Ground (High Precision)
Surface Treatment: Amber Finish (for M35) / Black & Gold / Bright Finish / TiN Coated
Case: Professional Blue Powder-Coated Steel Index Box with Security Latches and Size Markings
Application: Ideal for High-Tensile Metal, Stainless Steel, Alloy Steel, Cast Iron, and General Purpose Drilling in Wood or Plastic.

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Introduction

★ 230-Piece HSS Metric Twist Drill Bit Set (1.0mm - 13.0mm)

This comprehensive 230-piece industrial set is engineered for high-volume workshops and production environments. It provides a strategic inventory of jobber-length twist drill bits ranging from 1.0mm to 13.0mm in 0.5mm increments, including specialized diameters (3.2mm and 4.2mm) for tapping operations. The set is organized in a heavy-duty steel index case to ensure rapid size identification and efficient inventory management for batch drilling tasks.

★ Key Features

• High-Volume Inventory: Contains 230 pieces to reduce downtime in professional settings where small-diameter bits are frequently consumed.
• Precision Manufacturing: Fully ground flutes provide accurate chip evacuation and high concentricity for tight-tolerance drilling.
• Strategic Size Distribution: Higher quantities for high-wear diameters (1.0mm-8.5mm) and specialized tapping sizes (3.2mm/4.2mm).
• Industrial Point Geometry: 135° split point (available on M35/M2) prevents "walking" and enables faster penetration in hard materials without pre-drilling.
• Durable Storage: Powder-coated steel case with integrated size markings and secure latches for long-term industrial use.

★ Technical Specifications

Feature	Details
Standard	DIN 338
Material Options	HSS-E M35 (5% Cobalt) / HSS M2 / HSS 4341
Manufacturing Process	Fully Ground
Total Piece Count	230 Pieces
Size Range	1.0mm – 13.0mm (0.5mm increments)
Quantity Distribution	1.0–8.5mm (10pcs each); 3.2mm & 4.2mm (10pcs each); 9.0–13.0mm (5pcs each)
Point Angle	118° Standard / 135° Split Point

★ Applications

• Materials: Stainless steel, alloy steel, cast iron, structural steel, aluminum, and high-density polymers.
• Industries: Automotive repair, metal fabrication, MRO (Maintenance, Repair, and Operations), and CNC machining workshops.
• Usage: Optimized for stationary drill presses and handheld power tools.

★ OEM & Wholesale Services

As an integrated manufacturer, Jiacheng Tools provides flexible customization for bulk orders:
• Material Grading: Options from HSS 4341 for general use to M35 Cobalt for heavy-duty metalworking.
• Surface Finishes: Bright, Black Oxide, Amber (Cobalt), or TiN (Titanium Nitride) coating.
• Private Labeling: Laser etching on drill shanks and custom logo branding on the metal case.
• Custom Configurations: Adjust piece counts and size distributions based on specific market demands.

★ FAQ

Q: Why does the set include 3.2mm and 4.2mm sizes?
A: These are critical precision sizes for pre-drilling holes intended for M4 and M5 metric taps, respectively. Including them in high quantities supports standard industrial fastening workflows.
Q: Are these drill bits suitable for stainless steel?
A: The HSS-E M35 (5% Cobalt) version is specifically designed for stainless steel and high-tensile alloys due to its superior red hardness.
Q: Can individual sizes be replenished?
A: Yes. We support wholesale replenishment of specific diameters in bulk packaging to maintain the integrity of your 230-piece kit.
Q: What is the benefit of the "Fully Ground" process?
A: Fully ground bits offer smoother flute surfaces for better chip flow and more precise hole diameters compared to roll-forged alternatives, making them ideal for professional applications.