MTE HSS DIN 338 Drill Bit Cylindrical Shank Short Fluted Type 4.5 mm

Mte Hss DIN 338 Drill Bit Cylindrical Shank Short Rolled Type 4.5 mm

Short Series, Rolled Type, Economical Solution for General Purpose Drilling and Pre-M5 Thread Use

Mte HSS DIN 338 Drill Bit (4.5 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 4.5 mm diameter is critically important in applications where there is a high risk of tap breakage, as it is the pre-drilling diameter that significantly reduces the tap load for M5 metric standard threads.

The product's core strength comes from its HSS (High-Speed Steel) material and, specifically, its Rolled Forged manufacturing method. Rolled bits are tougher, more economical, and more resistant to breakage, especially in handheld drills, compared to ground bits.

Technical Specifications and Material Details

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

Feature Name	Detailed Description
Diameter (Nominal)	4.5 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 increases the toughness and flexibility of 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 Finish	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 (Approx.)	Typically 118° point angle. (Rolled bits generally have a more basic geometry compared to ground bits).
Cutting Direction	Right Hand Cutting

Applications and Industries Used In

This drill bit is particularly used in applications requiring M5 thread 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 M5 threads (for standard 0.8 mm pitch). While 4.2 mm is ideal, 4.5 mm reduces the load on the tap, minimizing the risk of tap breakage.

Automotive and Ancillary Industry: Drilling in bodywork, chassis, and light alloy parts.

Plumbing and Pipelines: Drilling small diameter connection holes in thin-walled pipes and profiles.

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 4.5 mm diameter drill bit:

Reduced Risk of Tap Breakage: Although 4.2 mm is the ideal pre-drill size for M5 (0.8 mm pitch) threads, using a 4.5 mm diameter reduces thread engagement to about 75%. This significantly reduces the risk of tap breakage, especially when tapping by hand or with non-torque-controlled machines (at the cost of some thread strength).

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

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 and medium-hard metals, plastics, and wood.

DIN 338 Standard Short Series: This is the most commonly used standard length, which provides high rigidity (resistance to bending) and vibration-free operation.