The HRC70 ballnose end mill manufacturer tells you that in the milling process, the end mill can be divided into two types: down milling and up milling, according to the relationship between the rotation direction of the milling cutter and the cutting feed direction. The HRC70 ballnose end mill manufacturer tells you that it is called climb milling when the rotation direction of the milling cutter and the workpiece feed direction are the same. The rotation direction of the milling cutter is opposite to the workpiece feed direction, which is called up-cut milling.

Climb milling is generally used in actual production. The power consumption of down milling is smaller than that of up milling. Under the same cutting conditions, the power consumption of down milling is 5% to 15% lower, and it is also more conducive to chip removal.
The manufacturer of HRC70 ballnose end mill tells you that generally down milling should be used as much as possible to improve the surface finish (reduce roughness) of the machined parts and ensure dimensional accuracy. However, when there is a hard layer, slag accumulation on the cutting surface, and the surface of the workpiece is uneven, such as machining forging blanks, the up-milling method should be used. During climb milling, the cutting changes from thick to thin, and the cutter teeth cut into the unmachined surface, which is beneficial to the use of milling cutters. During up milling, when the cutter teeth of the milling cutter contact the workpiece, they cannot immediately cut into the metal layer, but slide a short distance on the surface of the workpiece. It is easy to form a hardened layer, which reduces the durability of the tool, affects the surface finish of the workpiece, and brings disadvantages to cutting. In addition, the manufacturer of HRC70 ballnose end mill tells you that during up milling, since the teeth are cut from bottom to top (or from the inside to the outside), and the cutting starts from the hard surface of the surface, the teeth are subjected to a large impact load, and the milling cutter becomes blunt. Faster, but there is no slippage during the cutting process of the cutter teeth, and the table will not move during cutting. Up milling and down milling, because the cutting thickness when cutting into the workpiece is different, and the contact length between the cutter teeth and the workpiece is different, so the wear degree of the milling cutter is different. The practice shows: the HRC70 ballnose end mill manufacturer tells you that the end mill is more durable than the down milling. The surface roughness can also be reduced by 2 to 3 times during up-cut milling. But climb milling is not suitable for milling workpieces with hard skin.