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HSSE 7.8 cobalt metal drill bit DIN 338
13289
Diameter (mm): 7,8115 sizes of this drill
0,30,40,50,60,70,80,911,11,21,31,41,51,61,71,81,922,12,22,32,42,52,62,72,82,933,13,23,33,43,53,63,73,83,944,14,24,34,44,54,64,74,84,955,15,25,35,45,55,65,75,85,966,16,26,36,46,56,66,76,86,977,17,27,37,47,57,67,77,87,988,18,28,38,48,58,68,78,999,19,29,39,49,59,69,79,89,91010,110,210,310,410,510,610,81111,211,311,511,81212,112,212,512,813
€3.88 tax inc.
Net price: €3.16
Description
Technical data for the Ø7.8 cobalt drill bit
| Technical data | |
|---|---|
| Working diameter of drill d | Ø7.8 mm |
| Overall length l1 | 117 mm |
| Overall length L | 75 mm |
- Drill bit manufactured according to DIN-338
- Suitable for drilling materials up to 37 HRC
- 130° point angle adapted for drilling INOX
- Made from the finest grade of HSS-E high-speed steel with 5% added cobalt
- Produces a hole with an h8 tolerance
- Low hole surface roughness
Cutting data for the Ø7.8 mm HSSE NWKa drill bit
| Material | Cutting speed Vc [m/min] | Feed per revolution f [mm] | Spindle speed n [rpm] | Total feed rate [mm/min] |
|---|---|---|---|---|
| PSteel | 20 | 0.08 | 806 | 64 |
| MStainless steel | 10 | 0.08 | 403 | 32 |
| KCast iron | 15 | 0.08 | 605 | 48 |
| NAluminum and nonferrous materials | 34 | 0.1 | 1371 | 137 |
May be useful
Cutting parameters calculator
Ø7.8 Inox cobalt drill bit for metal
7.8 mm cobalt drill bit for metal HSSE Inox. Professional twist drill bit with a smooth straight shank for drilling through holes and blind holes with a diameter of 7.8 mm. Drill bits of this type feature 2 central cutting edges, a 118° point angle, ground cutting edges that withstand impacts and lateral forces, and special flutes for efficient evacuation of cut chips. The drill bits are manufactured to the NWKa, DIN 338 dimensional standard from special HSSE high-speed steel with 5% added cobalt. This exceptional steel composition provides greater cutting efficiency, improved accuracy, the ability to drill holes in very hard and difficult-to-machine materials, and greater drill bit resistance to demanding operating conditions. Our drill bits rarely suffer mechanical damage, which significantly extends their service life. 7.8 mm cobalt drill bit for metal is suitable for professional machining in large metalworking shops using conventional drilling machines and computer numerically controlled machine tools.
Product accessories
Metal drill bit 7.8 long 156/109 HSS DIN 340
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HSSE 9.8 cobalt metal drill bit DIN 338
Reference: 0000008587 In stock > 10 items
€3.68
€4.53 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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