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Description
Technical data of fi 7.8 cobalt drill bit
| Technical data | |
|---|---|
| Working diameter of drill d | fi 7,8 mm |
| Total length l1 | 117 mm |
| Overall length L | 75 mm |
- Drill bit made according to DIN-338
- Drilling up to a hardness of 37 HRC possible
- Blade angle of 130 degrees suitable for drilling in INOX
- Made from top grade HSS-E high speed steel with 5% cobalt addition
- Produces a hole in h8 tolerance
- Low roughness of the hole
Cutting parameters of drill fi 7.8 mm HSSE NWKa
| ISO symbol | Material | Cutting speed Vc [m/min] | Feed per revolution f [mm] | Revolutions n [obr/min] | Total feed rate [mm/min] |
|---|---|---|---|---|---|
| P | Steel | 20 | 0,08 | 806 | 64 |
| M | Stainless steel | 10 | 0,08 | 403 | 32 |
| K | Cast iron | 15 | 0,08 | 605 | 48 |
| N | Aluminum and non-ferrous materials | 34 | 0,1 | 1371 | 137 |
May be useful
Cutting parameters calculator
Drill cobalt fi 7,8 Inox
Drill 7,8 mm cobalt HSSE Inox. Professional twist drill bit with smooth cylindrical chuck for drilling through-holes and blind holes with a diameter of 7.8 mm. Drills of this type have 2 central blades, a tip angle of 118 degrees, ground cutting edges resistant to impact and lateral forces, and special chip grooves for efficient removal of cut chips. The offered drills are manufactured according to the NWKa, DIN 338 dimensional standard from special HSSE high-speed steel with 5% cobalt. This unique composition of the steel contributes to higher cutting efficiency, better precision, the ability to drill holes in very hard and hard-to-machine materials and greater resistance of the drill bits to harsh working conditions. Our drills are rarely subject to mechanical damage, which significantly extends their service life. Drill the 7.8 mm cobalt drill bit is suitable for professional processing in large locksmith shops using conventional drilling machines and computer-controlled numerical control machine tools.
Product accessories
Self-clamping drill chuck 1-13 B16 PTRu
Reference: 0000004205 In stock > 10 items
€16.05
€19.74 brutto
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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