What is a reaming drill

Drill and reaming drill is the same thing, but the role is different, are the use of cutting edge drilling; The drill drill expands the bottom hole drilled by the drill bit.

What are the specifications and characteristics of reaming drill

1, good rigidity. Due to the small amount of back cutting and less chips, the chip holding slot of the reaming drill is shallow and narrow, and the diameter of the drill core is large, which increases the rigidity of the working part of the reaming drill.

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

3, the chip condition is better. Reaming drill without transverse edge to participate in cutting, cutting light, can use a larger feed, high productivity; And because the chip is less, the chip is removed smoothly, and it is not easy to scratch the processed surface.

Therefore, compared with drilling, reaming has higher machining precision and lower surface roughness value, and the axis error of drilling can be corrected to a certain extent. In addition, the machine for reaming is the same as for drilling.

The difference between twist drill, reaming drill and reamer

Reamer is the use of side edge cutting, the drill out of the dimensional accuracy is not high, hole wall finish is not high hole, through the reamer to cut, so that the accuracy of the hole, finish to meet the requirements.

Drill bit: composed of drill tip, cutting edge and chip discharge groove (spiral or straight groove), mainly used for the workpiece hole processing without pre-casting hole, the processed hole is generally cylindrical and roughness is poor;

Reaming drill: composed of cutting edge and chip groove (welding blade reaming drill), mainly used to expand and improve the cylindricity and roughness of holes with pre-cast holes or bottom holes.

However, the hole at this time still cannot be used as a pin hole;

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

The above can be seen that they are different in structure and processing accuracy.