Drill bit

Drill bits are the cutters of drill tools. Bits are interchangeable, meaning that they can be removed from the end of the drill, either to replace a worn part or to change the size of the part.

Gun drill

Gun drills are straight fluted drills which allow coolant to be directed through the drills body, directly to the cutting face. They are used for deep drilling of which gun barrels are the obvious example. The coolant provides lubrication and cooling to the cutting edges as well as ejecting the swarf or chips back out the drills length. Modern gun drills take advantage of carbide tips to reduce expense and prolong life. The images show the coolant holes in the drills shank and tip, as well as full length (12mm dia x 635mm long) gun drill and the carbide tip of a second (25mm) gun drill.

Related Topics:
Coolant - Gun barrel - Swarf - Carbide - Tips

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Image:GunDrill-12x640-25mm.jpg|12x640mm gun drill and 25mm gun drill tip

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

Image:GunDrillCoolantHoles.jpg|Coolant holes in tip and base of gun drill

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ ~ ~ ~ ~ ~ ~ ~