Общий каталог ZCC-CT 2019 - страница 1112

Technical information – drilling Technical information Solid carbide drills Terminology A 1. Drilling diameter 2. Chamfer Turning 4 5 3. Point angle 6 4. Clearance angle 5. Chip pocket 3 6. Shank 7 1 7. Shank diameter 8. Shank length 11 9. Overall length 10 8 10. Flute length 2 9 11. Helical angle B a a. Margin width d b b. Body clearance c. Land width d. Primary cutting edge Milling c Cutting edge type C Drilling Shape (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 reduces Features – Wide applications, commonly used both for soft and hard materials. – Often used for small diameter drills. burrs. – It is the first choice for drilling thin plate. D Information Technical E Index C171