How To Choose A Suitable Shoulder Milling Cutter?

Square shoulder milling cutters, 90-degree inserts are called shoulder milling cutters, and with large diameters are also called face milling cutters. Most of the square inserts belong to 45-degree or not 90-degree face milling inserts. Shoulder milling cutters account for 50-60% of all milling operations and can be a good substitute for general rake face milling; they can mill steps. Shoulder milling cutters can be used in many applications, including: plunge milling, ramp milling, circumferential interpolation milling, helical interpolation milling, drilling, face milling, etc.

Then how to choose the right shoulder milling cutter in a limited tool library?

In the metalworking industry, the concept of shoulder milling is increasingly common. One reason: Companies are choosing to invest in smaller machines with spindle tapers of 30 and 40 in order to reduce shop floor space. With the continuous improvement of casting and forging quality, reducing the depth of cut, the use of small diameter tools has also become a trend. Today, many CNC machined service manufacturers are finding that their machine tools require more tool magazine locations. They also require standard tool settings for increased flexibility, given the general reduction in production batches.

There are two ways to rotate the shoulder milling cutter: down milling and up milling. Climb milling: The rotation direction of the milling cutter is the same as the feed direction of the cutting, and the milling cutter bites the workpiece and cuts off the last chip at the beginning of the cutting. Up-cut milling: The rotation direction of the milling cutter is opposite to the feeding direction of the cutting. The milling cutter must slip on the workpiece for a period before starting to cut, starting with the cutting thickness at zero, and reaching the maximum cutting thickness at the end of the cutting.

The most typical square shoulder milling inserts on the market today are APMT and APKT. With the improvement of accuracy, the APKT series gradually replaced the APMT series. Its sizes include APKT1003 and APKT1604 for processing plants to choose from. In addition, with the continuous upgrading of major tool brands, more square shoulder milling cutters that meet different working conditions have been introduced, such as CoroMill end mills from Sandvik Coromant, and its matching milling insert is R390-11T308.

CoroMill 390 sets new performance standards in insert safety and part quality. Its success is based on the fact that it has an extremely wide range of applications, which is complemented by its excellent economic performance and high productivity in many applications.

Shoulder milling is used in many tasks, and by using Sandvik Coromant’s new generation of inserts and CoroMill 390, it is possible to increase cutting speeds, thereby increasing productivity and reducing part cost.

In general, shoulder milling is becoming increasingly popular as the metalworking industry moves towards smaller machines and higher quality castings. Shoulder milling provides a versatile and flexible solution for many applications, with benefits such as deeper sidewalls, natural play for complex tight setups, and the ability to use extra-large tools to expand tool assemblies. It also reduces tool type requirements for shoulder and open face milling operations.

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