Viking Drill and Tool St. Paul MN
America's Finest High-Speed Steel Cutting Tools™

Proudly Manufactured in the USA
 PRODUCT CATALOG >> Type 260-TN Titanium Nitride Screw Machine

Titanium Nitride Screw Machine Length

Type 260-TN Titanium Nitride Heavy Duty NAS 907C Screw Machine Length 135° Split point
Type 260-TN Titanium Nitride Screw Machine Length 135° Split point


Accurate centering, fast penetration. Ideal for thin metal work.
Titanium Nitride coating provides a super hard surface with high lubricity.
Advantages in using a titanium nitride coating are improve efficiency, reduce
     maintenance costs, and eliminate unnecessary downtime.
— A sturdy drill for use in portable power drilling.
Sizes smaller than #52 are not split pointed.
Proudly manufactured in the USA.

Adobe Acrobat Logo PDF — Type 260-TN Titanium Nitride Screw Machine Length
 Helix Angle (Spiral Angle)
Helix-Angle Comparison

An essential feature of a twist drill is the helix angle (Spiral Angle). It determines the process
of chip formation. Larger helix angles provide effective removal of soft, long-chipping materials.
Smaller helix angles, on the other hand, are used for hard, short-chipping materials.
Twist drills that have a very small helix angle (10° - 19°) have a lengthy spiral. In return, twist drills with a large helix angle (27° - 45°) have a rammed (short) spiral. Twist drills with a normal spiral have a helix angle of 19° - 40°.