HSS Metal Drill Bit Set 10 Pcs 7 mm YT-3944 YC
Key information
Availability:Temporarily out of stock — ask for availability
Shipping cost:From 3.29 Euro
catalog number:YT-3944
Availability:
EAN code:5906083939440
Product condition:New, originally packaged
Guarantee:24 months of consumer protection
Weight:0,29 kg
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HSS metal drill bits 7 mm Yato YT-3944 – pack of 10
A pack of ten 7 mm metal drill bits made from HSS-G high-speed steel to DIN 338. Designed for drilling carbon steel, stainless steel, non-ferrous metals and plastics with hammer and non-hammer drills.
Features of the HSS-G metal drill bit
HSS-G high-speed steel
The HSS-G (High Speed Steel Ground) designation refers to ground high-speed steel, which withstands the high temperatures generated during drilling. The material retains its hardness and keeps the cutting edges sharp even under intensive use, which gives the bit a longer service life.
DIN 338 standard
The DIN 338 standard defines the geometry of the drill bit: a 118° point angle, spiral flutes for chip clearance and a cylindrical shank. This design keeps the bit tracking steadily through the material and removes swarf from the hole efficiently, reducing the risk of the tool overheating.
7 mm diameter
A 7 mm diameter is one of the most common sizes for assembly and installation work. It allows holes to be drilled for M6 screws, medium wall plugs and standard-size installation cables.
Cylindrical shank
The cylindrical shank fits standard 1.5-13 mm three-jaw drill chucks. The smooth surface of the shank ensures a secure hold with no risk of slipping under load.
Technical specification
| Model | YT-3944 |
| EAN code | 5906083939440 |
| Manufacturer | Yato |
| Drill bit diameter | 7.0 mm |
| Material | HSS-G (ground high-speed steel) |
| Manufacturing standard | DIN 338 |
| Shank type | Cylindrical |
| Application | Metal, plastics |
| Pack quantity | 10 pcs |
| Set weight | 0.287 kg |
Applications for 7 mm HSS drill bits
- Drilling assembly holes in steel and aluminium sections
- Preparing holes for M6 metric screws in metal structures
- Drilling steel plate up to 10 mm thick
- Drilling holes in stainless and acid-resistant steel components
- Drilling non-ferrous metals: copper, brass, aluminium
- Preparing holes for rivets and pins in welded structures
- Drilling hard plastics (PVC, polycarbonate)
- Assembly work on electrical and plumbing installations
Use and maintenance
Drilling parameters
For structural steel, the recommended speed is 800-1200 rpm with a feed rate of 0.1-0.15 mm/rev. For stainless steel, reduce the speed to 600-800 rpm and use emulsion or oil cooling. Aluminium requires higher speeds of 1500-2000 rpm with a lubricant that prevents swarf from sticking.
Sharpening and storage
HSS-G drill bits can be sharpened with a drill bit sharpener or a bench grinder while maintaining a point angle of 118°. After use, clean the swarf off the bits and protect them from moisture. Storing them in a dedicated case prevents damage to the cutting edges and keeps the tools organised.
Commercial information
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