Mte Hss DIN 338 Drill Bit Cylindrical Shank Short Ground Type 14.5 mm

Mte HSS DIN 338 Drill Bit Cylindrical Shank Short Ground Type 14.5 mm

Short Series, Ground Type, Solution for High Precision and Pre-M16 Thread Applications

Mte HSS DIN 338 Drill Bit (14.5 mm) Short Series, Ground Type is a high-quality cutting tool designed for precise drilling operations. This drill bit is especially ideal for applications requiring high tolerance and excellent surface finish, particularly in larger diameters. It has a sharper geometry and more accurate diameter compared to roll-forged types. With a diameter of 14.5 mm, it has a significant application area as it is the pilot hole diameter that minimizes the load on the tap for M16 metric standard threads (2.0 mm pitch).

The core strength of the product comes from its HSS (High-Speed Steel) material and, specifically, its Ground manufacturing method. Ground drill bits offer higher precision, sharper cutting edges, and better chip evacuation compared to rolled drill bits.

Technical Specifications and Material Details

The Mte Drill Bit has optimized features for M16 tapping preparation and general-purpose drilling applications.

Feature Name	Detailed Description
Diameter (Nominal)	14.5 mm
Standard	DIN 338: German standard for twist drills with cylindrical shanks and standard short length.
Manufacturing Method	Ground: The drill bit is fully ground from solid steel. This ensures high precision, tighter tolerances, and excellent surface quality.
Material Type	HSS (High-Speed Steel): Offers high wear resistance and toughness. Does not contain cobalt (HSS-E) (Standard HSS).
Surface Finish	Bright finish (typically).
Shank Type	Cylindrical Shank: The shank diameter of large diameter drill bits is often reduced to 13 mm (Reduced Shank) or is fully 14.5 mm (May vary depending on machine capacity).
Point Angle (Estimated)	Typically 118° point angle. (Offers better centering and cutting performance due to its precise geometry).
Cutting Direction	Right-hand cut

Application Areas and Industries

This drill bit is particularly used in large-diameter applications requiring M16 thread preparation and general assembly holes:

Machine Manufacturing and Assembly: Pre-drilling for M16 metric standard threads (for standard 2.0 mm thread pitch). While 14.0 mm is ideal, 14.5 mm minimizes the load on the tap, reducing the risk of tap breakage.

General Metal Fabrication: Drilling assembly holes in medium and thick section steel, stainless steel (low alloy), cast iron, and aluminum profiles.

Plumbing and Construction: Drilling in steel structures, pipelines, and flanges.

Mold and Tool Manufacturing: Preparation for precise and large-diameter tapping operations, especially when tap breakage is costly.

Automotive Heavy Industry: Drilling in large parts such as chassis and engine blocks.

User Information and Benefits

This product appeals to users seeking high precision and reliable performance for M16 tapping operations:

Reduces Risk of Tap Breakage: Although 14.0 mm is the ideal pilot hole for M16 (2.0 mm pitch) threads, using a 14.5 mm diameter slightly reduces thread engagement. This significantly reduces the risk of tap breakage, especially in hard materials or when hand tapping (at a slight expense of thread strength).

High Precision and Surface Quality: Thanks to the ground manufacturing method, hole diameter and position are extremely precise. Provides a smoother surface quality in large-diameter holes.

Sharper Cutting Edges: Sharper cutting edges compared to rolled types require less cutting force and create cleaner holes.

Improved Chip Evacuation: Precisely ground flutes ensure efficient evacuation even with large chip volumes.