When it comes to precision metal drilling, HSS DIN338 jobber drill bits are among the most trusted tools across global manufacturing and maintenance sectors. Whether you're sourcing for OEM production, workshop use, or wholesale distribution, understanding the features, tolerances, and real-world benefits of these drill bits is crucial for making the right procurement decisions.
In this article, we break down everything you need to know about HSS DIN338 jobber drill bits — from the DIN standard specifications to their performance in industrial settings — to help you choose the right tools for your operations or customers.
Let’s start with the terminology:
HSS: Stands for High-Speed Steel, a material known for its heat resistance, toughness, and wear performance.
DIN338: A German DIN (Deutsches Institut für Normung) standard that specifies the geometric and dimensional criteria for jobber-length twist drills.
Jobber length: A medium-length drill bit with a flute length roughly 8–12 times the diameter, balancing rigidity and reach.
Together, HSS DIN338 drill bits are designed for general-purpose drilling in materials like:
Mild steel
Aluminum
Brass
Non-ferrous alloys
Plastics
They are especially popular in machine shops, fabrication facilities, and production lines where versatility and standardization are essential.
HSS offers excellent cutting performance at high speeds and resists heat buildup during drilling. It’s ideal for manual drilling or CNC use, especially in metal substrates.
Tip: For harder metals (e.g., stainless steel), consider HSS with cobalt (e.g., M35 or M42 grade).
According to DIN338:
| Specification | Standard Value |
|---|---|
| Point Angle | 118° (standard) |
| Helix Angle | 20°–30° (right-hand cut) |
| Tolerance Class | h8 (for shank); ensures precise fit in tool holders |
| Flute Type | Type N (for general metal drilling) |
| Length Class | Jobber (medium flute and overall length) |
| Shank Type | Straight cylindrical shank |
This ensures compatibility with international tool holders and machines, making it a safe default option for global buyers.
Standard Point (118°): Suitable for general applications, especially when used with drill presses.
Split Point (135° optional): Reduces walking and offers better centering. Recommended for manual drilling or tougher materials.
Ask your supplier for split-point HSS DIN338 options if you're working with curved surfaces or hardened metals.
One of the main reasons DIN338 drills are favored by industrial users is their tight dimensional tolerances. This consistency ensures:
Repeatable hole diameters
Smooth chip evacuation
Secure fit in tool holders (no wobble)
Better surface finish on drilled holes
Such tolerances are essential for automated production lines, precision assemblies, and aerospace or automotive part machining, where small deviations can lead to assembly issues or safety concerns.
Here’s how HSS DIN338 jobber drill bits support industrial buyers and operators:
One drill type suitable for multiple materials, reducing the need for frequent tool changes.
Thanks to the DIN standard, purchasing teams can easily manage global inventory with fewer variants and better interchangeability.
HSS is more economical than carbide yet robust enough for high-volume production in mild steels and aluminum.
Unlike coated or carbide drills, HSS bits can be resharpened multiple times, extending tool life.
A mid-sized manufacturer of HVAC systems in Europe was facing inconsistent drilling quality due to using mixed-standard drill bits. After switching to DIN338-compliant HSS jobber drills, they reported:
22% reduction in bit breakage
Improved hole accuracy across automated and manual stations
Simplified procurement with unified specifications across production lines
When selecting HSS DIN338 drill bits, ask the following:
What material will you be drilling?
Standard HSS for mild steel or aluminum
HSS-Co (5–8% cobalt) for stainless steel or alloyed metals
What coating do you need?
Uncoated for general-purpose use
Black oxide for rust resistance
TiN / TiAlN for better heat and wear resistance
Do you require OEM or private labeling?
Choose a supplier that offers bulk manufacturing and custom branding if you're a distributor.
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HSS DIN338 jobber drill bits remain a reliable, efficient, and globally recognized solution for industrial drilling needs. Whether you're looking for versatility in the workshop, consistency in production, or simplified procurement across borders, DIN338-standard drills offer a smart, standardized solution.
If you're sourcing for OEM, wholesale, or industrial use, we can help you optimize tooling selection based on application, material, and volume. Let our technical team assist — Contact Us for a Quote.
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