Imperial Straight Shank Black HSS Drill Bit

I. Specifications & Sizes

• Metric Sizes: 1.0mm to 13.0mm (complete range of commonly used sizes).
• Inch Sizes: 1/16" to 13/16" (including 1/16", 5/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 5/16", 3/8", 7/16", etc.).
• Shank Design: Standard cylindrical straight shank, compatible with standard three-jaw drill chucks, bench drills, and power drills for secure and stable clamping.

Set Options

• 13-Piece Set: Includes 1.0mm, 1.1mm, 5/64", 2.5mm, 3.2mm, 3.5mm, 5/32", 4.5mm, 4.8mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm (1 pc each).
• 8-Piece Set: Includes 5/32", 4.5mm, 5.0mm, 6.0mm, 6.5mm, 8.0mm, 8.7mm, 23/64" (1 pc each).

II. Material Description

• Premium Material & Craftsmanship: MARUDA black drill bits are crafted from standard High-Speed Steel (HSS), featuring a professional black oxide surface finish that enhances wear and corrosion resistance.
• Heat Resistance & Cutting Performance: The HSS material provides good cutting performance and toughness. Through precision heat treatment and black oxide finishing, it reduces chip adhesion and frictional resistance, maintaining smooth cutting capability during routine tasks.
• International Standards: Manufactured in compliance with DIN international standards to ensure cutting accuracy and stability.
• High Cost-Performance Practical Choice: Developed for lightweight general machining and daily maintenance, offering fast cutting speeds and tight tolerances as an economical and efficient practical tool.

III. Product Features

• Application Range: Suitable for general thin iron sheets of around 2mm, thin plates, wood, and plastics (Note: This series is not suitable for aluminum).
• Target Audience & Positioning: This series is primarily designed for DIY projects, home improvements, and light-duty tasks. For heavy-duty, high-intensity, or professional continuous applications, please consider our "M2 Titanium-Coated Drill Bits" or "M35 Cobalt Drill Bits".
• Clearance Notice: This is a clearance item series. Quantities are limited, and once a specific size is sold out, it will no longer be restocked or sold.
• High-Efficiency Cutting: Optimized for thin plate cutting, delivering fast speeds and minimal tolerances to effectively boost daily work efficiency.
• Professional Endorsement: Backed by over 30 years of market presence, highly praised by customers and hardware stores.
• Field-Tested: Search YouTube for "STANBAL 鑽尾測試" to watch real-world operation.

IV. Operation & Maintenance Guide

【Proper Usage】

• Material Compatibility: Designed specifically for general thin iron sheets (~2mm), thin sheets, wood, and plastics (Caution: Not suitable for aluminum). When drilling metal, appropriate water or cutting fluid cooling is recommended to extend tool life.
• Tool Compatibility: Standard straight shank design, compatible with standard three-jaw drill chucks, bench drills, and power drills for convenient and secure fastening.
• Speed Control: Adjust drill speed lower for larger hole diameters. High-speed blind drilling is strictly prohibited to prevent overheating and bit damage.

【Routine Maintenance】

• Cleaning & Protection: After use, clean out any residual metal chips and debris from the flute, wipe clean with a cloth to remove oil or cutting fluid, and store in a dry environment.
• Regular Oiling: If left unused for an extended period, apply a thin layer of rust-preventive or lubricating oil on the metal surface to preserve anti-oxidation performance.
• Storage & Management: After single-piece use, it is recommended to store them properly in a moisture-proof tool box or dedicated drill rack to avoid edge damage from impacts.