Каталог Iscar инструмента для сверления - страница 15

Single Flute Gundrill ISCAR's gundrill consists of a single piece carbide Carbide Tipped head, a streamlined shank and a driver through Gundrill Range which coolant flows to the working end where it

6.00 to 11.39 3000 11.40 to 40.00 3500 Drilling Head Overall length=flute length+driver length The carbide head is tapered on its length to

reduce friction. The taper angle depends on the type of material to be drilled. For high precision drilling, the taper should be reduced to a minimum Note that when the head is resharpened, the diameter of the drill changes, affecting the hole tolerance. Shank The cross-section of the shank is V-shaped with coolant holes. It is made of hardened steel that is highly resistant to twisting (for information on carbide shanks, see next page). This crosssection provides the optimal conditions for twist resistance, coolant flow and chip evacuation. Driver Driver The driver ensures the connection between the gundrill and the machine tool.

Shank

Drilling Head

Advantages

• Drilling precision of IT7 to IT9 tolerances ISCAR’s advanced gundrill technology provides superior can be reached. geometric and dimensional quality for both deep and
• Excellent straightness and concentricity. shallow drilling.
• Maintains high precision hole center alignment. The drills are available in the range of 2.5 to 40mm.
• Surface roughness of R 0.4-1.6mm is easily obtained.
• Reboring operations are often unnecessary.