Sandvik Coromant Introduces CoroMill® MR80 for Efficient Face and Profile Milling

Sandviken, Sweden – Sandvik Coromant, a cutting tool specialist, has launched a new milling concept, CoroMill® MR80, primarily designed for challenging roughing operations in a wide range of face and profile milling applications in steel and stainless steel. ​

“CoroMill® MR80 is a double-sided round insert concept with a higher number of inserts as compared to regular round insert cutters”, says Sangram Dash, Global Product Application Specialist (Indexable Milling Tools), Sandvik Coromant. “It is ideally suitable for low depth of cut—up to 3 mm—face milling and profile milling applications in both steel and stainless steel.”

Originally designed for machining cast stainless components in the automotive sector, particularly turbochargers and exhaust manifolds, this product has been further developed to cater to steel milling applications, which require the security of a round cutting edge—such as the die and mold segment. As a result, CoroMill® MR80 is a highly capable and versatile milling concept, offering both higher productivity and economical machining in a wide range of operations while never compromising on security.

“The round cutting edge is considered to be the most secure edge for challenging materials as well as tough cutting conditions,” explains Dash. “Furthermore, the shim provides additional security for the cutter body, protecting against coining deformation and machining accidents, while also securing the insert in the tip seat by restricting micro-movements during cutting.”

An economical solution, CoroMill® MR80 features double-sided inserts with 12 indexing possibilities when operated within a 3 mm depth of cut. “That means more parts for each set of inserts,” says Dash. “Also, a higher number of inserts on a cutter body enables a higher table feed and increased productivity. On top of that, the overall security and reliability mean less damage to the cutter body and inserts—which in the end helps to cut costs.” Thanks to its lightweight cutting geometry, it is also possible to use CoroMill® MR80 as a problem-solver in difficult machining situations—even at long overhangs.

“Often automotive-cast stainless components, due to their intricate shapes, are mounted on a fixture that may not be suitable for higher cutting loads,” says Dash. “And often in die and mold, the cutter must go deep into the mold cavity, mounted on a long adaptor. In both cases, the cutting forces must be limited so that vibration can be avoided. Even if CoroMill® MR80 is a double-sided negative concept, it works with fairly low cutting forces and is a suitable solution for such applications.”

The CoroMill® MR80 assortment offers cylindrical and Arbor cutter bodies with diameters ranging from 32-100 mm, 3-12 cutting teeth, even pitch, and shim-protection. All cutter bodies feature an internal coolant supply. The double-sided E-L50 inserts offer true and easy indexing (6 + 6), with a 3 mm recommended depth of cut.

Image Source: Sandvik Coromant

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