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Multi-step drill bit DIN 8378 type N cyl. HSS ground 90° M8, 6.8 x 9 mm

Multi-step drill bit DIN 8378 type N cyl. HSS ground 90° M8, 6.8 x 9 mm

Multi-step drill bit DIN 8378 type N cyl. HSS ground 90° M8, 6.8 x 9 mm
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Bild
Item no: 1010840 105 

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Available in 6-8 working days.

Application
For producing threaded core bore holes and countersinks according to DIN 336 Part 1. Free countersinks for through-bores according to DIN EN 20273. For drilling in steel and cast steel, alloyed and unalloyed up to 900 N/mm² strength, aluminium alloys, bronze, brass.

Execution
  • Countersink angle 90°
  • With straight shank
  • Tip angle 118°
  • Cone polished section
  • Thinned chisel edge and surface treatment
  • HSS, ground

Notes
When working with step drills, the cutting speed is based on the large diameter (d1), the feed is based on the small diameter (d2).

Brand: HARTNER
Material to be processed: Steel
Cutting material: HSS
Surface: Vaporised
Angle of the tip: 118 Degree
Coolant supply: External
Tool holding device: Cylinder shank
Suitable for screw thread: M8
Pilot hole diameter (d1): 6,8 mm
Spot-facer diameter (d2): 9,0 mm
Pilot hole length (l3): 21,0 mm
Chip flute length (l2): 81 mm
Length (l1): 125 mm
Shank diameter: 9,0 mm
f steel 700: 0,15 mm/r
Countersink angle: 90 Degree
Cutting direction: Right-hand cutting
DIN: 8378
Number of cutting edges: 2
Cutting speed (aluminium long) suitability: 2
Cutting speed (aluminium long) Vc: 45,00 m/min
Cutting speed (aluminium short) suitability: 2
Cutting speed (aluminium short) Vc: 55,00 m/min
Cutting speed (brass long) suitability: 2
Cutting speed (brass long) Vc: 30,00 m/min
Cutting speed (brass short) suitability: 2
Cutting speed (brass short) Vc: 60,00 m/min
Cutting speed (bronze long) suitability: 2
Cutting speed (bronze long) Vc: 30,00 m/min
Cutting speed (bronze short) suitability: 2
Cutting speed (bronze short) Vc: 60,00 m/min
Cutting speed (cast) suitability: 2
Cutting speed (cast) Vc: 25,00 m/min
Cutting speed (graphite/carbon-fibre reinforced) suitability: 3
Cutting speed (hard 55) suitability: 3
Cutting speed (hard 65) suitability: 3
Cutting speed (nickel) suitability: 3
Cutting speed (plastic) suitability: 2
Cutting speed (plastic) Vc: 35,00 m/min
Cutting speed (steel 1000) suitability: 1
Cutting speed (steel 1000) Vc: 20,00 m/min
Cutting speed (steel 1300) suitability: 3
Cutting speed (steel 700) suitability: 1
Cutting speed (steel 700) Vc: 25,00 m/min
Cutting speed (super) suitability: 3
Cutting speed (titanium) suitability: 3
Cutting speed (VA mar) suitability: 3
Cutting speed (VA off) suitability: 3
Max. f in cast iron: 0,16 mm/r
Max. f in non-ferrous metals: 0,20 mm/r
Max. f in steel: 0,15 mm/r
Min. f in cast iron: 0,16 mm/r
Min. f in non-ferrous metals: 0,14 mm/r
Min. f in steel: 0,15 mm/r
Min./max. f in cast iron: 0.16-0.16 mm/U
Min./max. f in non-ferrous metals: 0.14-0.20 mm/U
Min./max. f in steel: 0.15-0.15 mm/U
Shank style: Cylindrical

Manufacturer part no.: 85310 9

EAN no.: 4031096119143

Product Datasheet Datasheet cutting values
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