Общий каталог ZCC-CT 2019 - страница 1112

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Навигация

Solid carbide drills A

Terminology

4 5

3

11 10 2 9

a d b

1. Drilling diameter 2. Chamfer 3. Point angle 6 4. Clearance angle 5. Chip pocket 6. Shank 7. Shank diameter 8. Shank length 9. Overall length

8 10. Flute length B

11. Helical angle

a. Margin width b. Body clearance c. Land width d. Primary cutting edge

c

C

Cutting edge type

(Conical) (Dual flats) (Centring tip)

– The flank face is conical and the clearance– The flank face is dual flats, to facilitate– This shape has two-stage point angles for
angel increases toward the centre of drill.cutting and initial entering.perfect centring capabilities and reducesD
– Wide applications, commonly used both for– Often used for small diameter drills.burrs.

soft and hard materials. – It is the first choice for drilling thin plate.

E