| Fast
Spiral Right Hand drills have a high helix and wide flute which promote
better chip ejection. Specially developed for drilling low tensile
strength materials such as aluminum, zinc, and soft steels. |
 |
Slow
Spiral Right Hand drills are for drilling brass, copper and similar
alloys. The low helix angle promotes better chip ejection and reduces
grapping on entrance and breakthrough. |
|
Left
hand helix for jobbers length applications where adjacent spindles
operate alternately. Also used in drilling out broken studs, bolts
and screws. |
