What are the differences between reaming drill, twist drill and reamer

Drill and reaming drill are the same thing, but play a different role, are using the cutting edge to drill; The drill enlarges the bottom hole drilled by the drill.

What are the specification characteristics of reaming drill

1, good rigidity. Due to the reaming of the back of the knife quantity is small, less chips, reaming drill chip tolerance slot is shallow and narrow, the diameter of the drill core is large, increased the working part of the reaming drill rigidity.

2, good guidance. The reaming drill has 3~4 cutter teeth, the number of edges around the tool increases, and the guiding effect is relatively enhanced.

3, the chip condition is good. Reaming drill has no horizontal edge to participate in cutting, cutting is brisk, can use a large feed, high productivity; And because of less chip, chip discharge smooth, not easy to scratch the processed surface.

Therefore, compared with drilling hole, reaming hole has higher machining accuracy and lower surface roughness, and can correct the axis error of drilling hole to a certain extent. In addition, the machine tool for reaming is the same as for drilling.

The difference between twist drill, reamer and reamer

The reamer is to use the side edge to cut, the size accuracy of the drill bit is not high, the hole wall finish is not high, after the reamer is twisted, so that the accuracy and finish of the hole meet the requirements.

Drill: by drill tip, cutting edge and chip groove (spiral or straight groove), mainly used for the workpiece hole processing without pre-cast hole, the hole processing cylindricity and roughness is poor;

Reaming drill: composed of cutting edge and chip slot (welding blade reaming drill), mainly used for the pre-cast hole or bottom hole to expand and improve the cylindricity and roughness, but the hole still can not be used as a pin hole;

Reamer: composed of cutting edge and chip groove (generally integral hard alloy), mainly used to improve the bottom hole cylindricity and roughness;