Mte Hss DIN 338 Drill Bit Cylindrical Shank Short Rolled Type 11.5 mm

Mte HSS DIN 338 Drill Bit Cylindrical Shank Short Rolled Type 11.5 mm

Short Series, Rolled Type, Economical Solution for General Purpose Drilling and Pre-M12 Thread Use

Mte HSS DIN 338 Drill Bit (11.5 mm) Short Series, Rolled Type, is an economical and versatile cutting tool designed for everyday drilling operations. This drill bit is commonly used, especially in mild steels, aluminum, brass, plastics, and other standard machinable materials. Its 11.5 mm diameter is critically important as it serves as a pre-drill diameter that minimizes the tap load for M12 metric standard threads, or as a loose clearance hole for M10 bolts.

The product's core strength comes from its HSS (High-Speed Steel) material and specifically its Roll Forged manufacturing method. Rolled bits are tougher and more economical than ground bits, making them ideal for general-purpose and high-volume drilling tasks.

Technical Specifications and Material Details

The Mte Drill Bit has optimized features for general-purpose and economical drilling applications.

Feature Name	Detailed Description
Diameter (Nominal)	11.5 mm
Standard	DIN 338: German standard for twist drill bits with cylindrical shanks and standard short length.
Manufacturing Method	Roll Forged: The bit is shaped by heating, forging, and rolling. This method imparts greater toughness and flexibility to the material while reducing production cost.
Material Type	HSS (High-Speed Steel): Offers high wear resistance and toughness. Does not contain Cobalt (HSS-E).
Surface Treatment	Bright Black Oxide or bright finish (Rolled bits usually have a black oxide finish).
Shank Type	Cylindrical Shank: Compatible with standard drill chucks.
Point Angle (Estimated)	Generally 118° point angle. (Rolled bits usually have a more basic geometry than ground bits).
Cutting Direction	Right Hand Cutting

Areas of Use and Industries

This drill bit is particularly used in applications requiring M12 thread pre-preparation and general assembly holes:

General Metal Fabrication: Drilling assembly holes in mild steel, aluminum, brass, and copper profiles.

Machine Manufacturing and Assembly: Pre-drilling for M12 metric standard threads (for standard 1.75 mm pitch). While 10.2 mm is ideal, 11.5 mm minimizes the load on the tap, reducing the risk of tap breakage.

Plumbing and Pipelines: Drilling medium-sized connection and clearance holes in large diameter pipes or flanges (very loose clearance hole for M10 bolts).

Automotive and Related Industries: Drilling in bodywork, chassis, and light alloy parts.

Hobby and DIY Projects: General-purpose drilling tasks in home and hobby workshops.

User Information and Benefits

This product appeals to users looking for a budget-friendly, general-purpose, and reliable 11.5 mm diameter drill bit:

Minimizing Tap Breakage Risk: Although 10.2 mm is the ideal pre-drill size for M12 (1.75 mm pitch) threads, using a 11.5 mm diameter reduces thread engagement below 70%. This almost eliminates the risk of tap breakage, especially when tapping hard materials or tapping by hand (requires sacrificing some thread strength).

High Toughness and Flexibility: Thanks to the roll-forged manufacturing method, these bits have high toughness. They are more resistant to breakage, especially when working with handheld drills (applications with vibrations).

Cost-Effectiveness: Rolled bits are more affordable than higher-performance ground bits. This makes them an economical choice for high-volume drilling operations in standard materials.

Versatility: Can be used in a wide range of materials, including soft to medium-hard metals, plastics, and wood.

DIN 338 Standard Short Series: The most commonly used standard length, providing high rigidity (resistance to bending) and vibration-free operation.