The Drill Is Classified by Usage

1. Center drill: generally used to drill the center point before drilling, the front cone has 60 degrees, 75 degrees, 90 degrees, etc. , lathe operation in order to use the tail support, holding should be held with 60 degrees center drill and lathe rear seat center 60 degrees to match.

2. Hemp drill: for industrial manufacturing on the most widely used kind of drill, we generally use is the hemp drill.

3. Ultra-hard drill: drilling before or all made of super-carbide tool material, used in the drilling material drilling.

4. Oil hole drill: drill body has two small holes, cutting agent through this small hole to reach the cutting edge part, to take away heat and chips, use this drill to general work things rotating, while the drill bit is stationary.

5. Deep hole drill: the earliest used for the barrel and stone pipe drilling processing, also known as the barrel drill bit. The deep hole drill is a slot-type that cuts off a quarter-strong part of a round tube to produce a bladed chip.

6. Drill bit reamer: In order to mass production needs, its front end is the drill bit, the back end is the reaper, the drill bit diameter and the hinge diameter only difference of the well-being hole margin, there is also a drill bit in the screw tap mixed use, so it is also known as mixed drill.

7. Taper drill: When processing mold feed, you can use the taper drill.

8. Cylindrical hole drill: We call it a sink mill, and a smaller part of the front of this drill is called a pole.

9. Conical hole drill bit: for drilling conical holes, its front angle has 90 degrees, 60 degrees and so on, we use the chamfer edifal knife is a conical hole drill bit.

10. Triangular drill: a drill used by an electric drill, its drill handle made into a triangular surface, so that the chuck can really fix the drill.