Climb milling vs conventional millingpros and cons

Milling is one of the most popular forms of machining and belongs to the chip milling group – in the shaping process, excess material is removed in the form of chips of repeatable form and size. Such machining methods allow the manufacture of parts of various shapes and complexity levels. Contemporary mills allow shaping a vast variety of parts 2D and 3D out of many types of material – from wood and polymers to metal alloys (eg. aluminum, steel, brass, copper). To show its full efficiency contemporary machining devices (especially numerically controlled) require dial-in good working parameters. These parameters should be adjusted to the processed material, technique of machining, and step in the process (eg. raw shaping or finishing). There are two key parameters in that area: climb milling and up-cut milling. Both of these are related to the direction of turning blades in relation to the machined area during feeding. Both have advantages and disadvantages and are recommended in different types of processing material. What are these differences and how to select the right technique for the material?

Climb vs conventional millingsurface finish

At RADMOT, we offer CNC milling services, CNC turning services, as well as many additional services, including washing, aluminum anodizing, laser marking and assembly. We have at your disposal over 80 modern machines in our machine park, all from renowned manufacturers. Download the presentation and check on which machine tools we produce CNC turned parts and CNC milled parts.

Up-cut milling, often called 'a traditional' is a form of machining when feed direction is opposite to the direction of cutting blade revolutions.  While using that technique chips are thrown in the direction of an unmachined surface in that pass of the spindle. Blades remove material 'from the bottom to the top'. Up-cut milling technique has the following features:

Climb milling vs conventional millingreddit

Due to the features mentioned above – especially better heat dispersion – climb milling is often used to process alloys. Provided 'natural' heat removal often can replace additional systems of the following. That makes milling metals with good temperature conductivity (eg. aluminum) simpler and way more effective. Among others – this is one of the most important reasons why CNC machining operators most often use climb milling.

What isclimb milling

Climb milling is the most popular type of metal machining. It is a technique where the feed rate has the same direction as the revolution of the cutting tool. In that situation, chips are thrown 'behind' the spindle, into the machined surface which decreases the possibility of build-up on the cutting tool or tangling ships around it. Climb milling is most often used in CNC machining, mainly due to the possibility of achieving a better quality surface. That technique characterizes:

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Just like in other machining parameters, the selection of the right technique of machining is a matter of an operator. While choosing the right type of processing he should take into consideration not only the direction of machining but also the tool life, selection of cutting edge, material type, and hardness of desired chip width and thickness.

Up-cut milling is popular in wood machining, especially in shops that use traditional mills with manual feeders. That technique is rarely used in milling metal, mainly because of high temperatures and higher risk of damaging surfaces and tools in case of wrongly dialed parameters of work. On the other hand – that technique finds its usage in milling heat-resistant alloys or in situations when firm mounting of the machined block is impossible. Up-cut milling is often used in machining polymers – mainly due to the direction of chip removal. Hot chips – while falling to the machined surface – can cause a thermal deformation. Removed in the direction of the unprocessed can be removed with the excess material.

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