Chesterfield-based Dormer Pramet (www.dormerpramet.com) has launched a new milling grade for general machining applications in a variety of common engineering materials.

Suitable for both finishing and roughing, even in unfavourable cutting conditions, the M8330 grade is said to provide a reliable and versatile option when machining steels and cast iron — with or without coolant.

The new grade is also suitable for stainless steel, super-alloys and hardened steels.

M8330 replaces the existing 8230 grade and features a nano-layered PVD coating that is designed to offer increased resistance to thermal cracks, improved toughness and greater impact strength.

Complementing more than 90 different existing types of Pramet milling inserts, M8330 is also available in a completely new range of inserts for copy milling.

RCMT10 inserts offer high rates of metal removal (up to 5mm depth of cut) and good durability.

Designed to allow a high feed per tooth, RCMT10 is available in three geometries to support operations in a range of materials: geometry F is for stainless steels, super-alloys and low-carbon steels; geometry M is for steels and stainless steels; and geometry R is for cast iron and hardened materials.

Dormer Pramet has also expanded its current line of SRC copy-milling cutters. SRC10 is a series of small-diameter cutters available in sizes from 25 to 66mm, and in a variety of types; these include end mills, modular and shell mills.

A double-negative design is used to provide a stable cutting action, even during roughing, making these cutters suitable for operations such as face milling, helical interpolation, ramping, progressive plunging and high-feed cutting.

All SRC10 cutters incorporate through-coolant, a high number of teeth and a pocket design that gives maximum support to inserts.