Mte Hss E DIN 338 Drill Bit Cylindrical Shank Short Gold Series 3.8 mm
Mte Hss E DIN 338 Drill Bit Cylindrical Shank Short Gold Series 3.8 mm
SKU ÜRÜN KODU: ÜRÜN KODU:B00005000380
BİZE ULAŞINMte HSS-E DIN 338 Drill Bit Cylindrical Shank Short Gold Series 3.8 mm
Gold Series, High Durability in Challenging Materials and Use Before M4 Thread
Mte HSS-E DIN 338 Drill Bit (3.8 mm) Gold Series is a small-diameter, high-performance cutting tool designed for professional and industrial drilling operations. This drill bit is optimized to deliver superior performance and extended tool life, especially in materials where standard HSS bits struggle, such as stainless steels (INOX), hardened steels, and high-alloy materials. The 3.8 mm diameter is a critical intermediate size for M4 metric fine threads or special fasteners.
The product's strength comes from its HSS-E (Cobalt Alloyed High-Speed Steel) material, which offers high-temperature resistance, and its Gold Series (TiN or similar) coating, which reduces friction and extends tool life.
Technical Specifications and Material Details
The Mte Drill Bit is manufactured to high standards for use in demanding working conditions.
| Feature Name | Detailed Description |
| Diameter (Nominal) | 3.8 mm |
| Standard | DIN 338: International German standard for twist drill bits with cylindrical shanks and standard short length. |
| Material Type | HSS-E (Cobalt Alloyed High-Speed Steel): Its 5% Cobalt alloy content (mostly M35 steel) provides exceptional resistance to high temperatures (Red Hardness). This maintains sharpness and durability even at high cutting speeds. |
| Surface Treatment | Gold Series (Typically Titanium Nitride - TiN Coating): A hard, thin, gold-colored coating. It increases wear resistance, reduces the coefficient of friction, and minimizes heat buildup, thereby extending tool life. |
| Shank Type | Cylindrical Shank: Compatible with standard drill chucks. |
| Point Angle (Estimated) | Typically 135° point angle with a split point geometry. This aids in excellent centering by reducing the need for a pilot hole (center punch). |
| Direction of Cut | Right-hand cut |
Areas of Use and Industries
This drill bit is particularly used in critical applications requiring small-diameter precision threading and drilling of difficult-to-machine materials:
Machine Manufacturing and Mold Making: Ideal for drilling pilot holes for M4 metric fine threads (e.g., M4x0.5) or high-strength holes for standard M4 threads.
Electronics and Precision Engineering: Drilling small, high-strength, and high-precision assembly holes (M4 bolt clearance hole or thread pilot hole).
Automotive and Ancillary Industries: Drilling holes for connection points in small control parts and precision components.
Marine and Chemical Industry: Drilling holes in stainless steel (INOX) materials, which is essential due to their high corrosion resistance.
General Metal Fabrication: Especially for preparing 4.0 mm bolt clearance holes or creating small pin bores.
User Information and Benefits
This product caters to professional users seeking consistently high performance, long tool life, and precise tolerances in challenging materials:
Precision in M4 Thread Applications: While 3.3 mm is ideal for standard M4 threads, the 3.8 mm diameter is used to provide a high-strength pilot hole for fine threads like M4x0.5. It is also a preferred choice for those desiring a high thread engagement for M4.
Stainless Steel and Hard Material Capability: Thanks to its HSS-E (Cobalt) content, it exhibits high heat resistance even in difficult-to-machine materials like stainless steels, extending tool life.
Cost/Efficiency Optimization: The TiN coating reduces friction and heat, extending tool life. This reduces production downtime and operating costs.
Excellent Centering: The 135° split point geometry prevents the drill from wandering on the material (walking) and reduces the need for a center drill, ensuring highly accurate hole starts.
Resistance to Breakage in Small Diameters: The cobalt alloy provides additional toughness and temperature resistance, which helps reduce the risk of breakage in small-diameter HSS bits.
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