Cobalt HSS M35 9 mm Metal Drill Bit T03090 Tvardy
Key information
Availability:In stock (ready to ship)
Shipping time:immediately
Shipping cost:From 3.29 Euro
catalog number:T03090
Availability:
EAN code:5901477154591
Product condition:New, originally packaged
Guarantee:24 months of consumer protection
Weight:0,06 kg
By purchasing this product, you will receive 37 points from us, which you can use for shopping in our store. This applies only to customers registered in our store.
- Product description
- Product reviews (0)
- Purchase history (1)
Cobalt HSS M35 9 mm Metal Drill Bit TVARDY T03090
Twist drill bit made from cobalt-bearing HSS high-speed steel, designed for drilling metals, including difficult-to-machine materials. Cylindrical shank to DIN 338.
Technical characteristics
HSS M35 cobalt alloy
The 5% cobalt content increases the hardness and heat resistance of the steel. The drill bit keeps its cutting edges sharp at temperatures up to 600°C, which allows higher rotational speeds and extends tool life compared with standard HSS drill bits.
3-stage point grinding
The 125° point with three-stage grinding makes the drill bit self-centring in the material. This removes the need for pre-punching, speeds up the work and reduces the risk of the bit slipping at the start of drilling.
Ground flute
Precision grinding of the helical flutes ensures accurate guidance of the drill bit and efficient chip clearance from the hole. This reduces heat build-up in the tool and improves the quality of the finished hole.
Increased wear resistance
The cobalt in the steel structure improves resistance to abrasion and oxidation at high temperatures. The drill bit retains its working parameters even under intensive use in materials up to 900 N/mm².
Technical specification
| Model | T03090 |
| Drill bit diameter | 9 mm |
| Material | HSS M35 (high-speed steel with 5% cobalt) |
| Standard | DIN 338 |
| Shank type | Cylindrical |
| Point angle | 125° |
| Grinding type | 3-stage |
| Flute type | Ground |
Applications
- Drilling structural and tool steels
- Machining stainless and acid-resistant steels
- Drilling grey and ductile cast iron
- Working with difficult-to-machine metal alloys
- Drilling aluminium and its alloys
- Machining copper, brass and bronze
- Industrial applications requiring tool durability
- Workshop tasks in metalworking and mechanical engineering
Machine compatibility
The 9 mm cylindrical shank fits standard drill chucks. Check the chuck capacity on your drill or driver — it should cover a 9 mm diameter. For pillar drills, make sure the motor output is at least 500 W for optimum performance at this diameter.
Use and maintenance
When drilling metals, use emulsion or cutting oil for cooling. For stainless steels, the recommended rotational speed is approximately 400-600 rpm at a 9 mm diameter. For structural steels, the speed can be increased to 800-1000 rpm.
After use, clean the drill bit of chips and material residue. Check the sharpness of the cutting edges regularly — a blunt drill bit generates more heat and increases the risk of damage. Store the tool in a dry place, protected from moisture and mechanical impacts.
Sharpening
The drill bit can be sharpened on a grinder with a 60-80 grit corundum wheel. Keep the original 125° point angle and the symmetry of both cutting edges. Avoid overheating the material during sharpening — excessive temperature reduces the hardness of the cobalt alloy.
Commercial information
Nobody has written a review for this product yet. Be the first to write a review.
Write a review for this product and you will receive 100 points from us that you can use for shopping in our store. This applies only to customers logged in and registered in our store.
Only registered customers can write product reviews. If you have an account in our store, log in to it, if not, create a free account and write a review.
Client: Gr...ic,date of purchase 24-01-2023 21:41
