Indexable Carbide Inserts
A great deal of material removal operations, both milling and turning, utilize indexable (replaceable) tungsten carbide cutting tool inserts. The sheer variety of styles and types can confuse even experienced machinists. While is not possible to describe the merits and deficiencies of all the various types, we will attempt to provide a brief overview of standard nomenclature with an emphasis on those inserts currently being used by the UAH CoE Machine Shop CNC Department.
ISO (International Standards Organization) Inserts
As the name implies, inserts (and toolholders) in this category have been standardized so that the inserts from all manufacturers are essentially the same and are interchangeable. The numbering system for this standard is as follows:
Proprietary (Single source manufacturer) Inserts
Many of the inserts and toolholders we use have been developed by manufacturers to meet specific needs and improve specific processes. Since these developments are covered by patents, they are only available through a single source. Most of the proprietary inserts and toolholders we use are manufactured by Kennametal, Iscar, and Circle. A partial summary is listed below.
APKT 1003PDR-HM 328 Helimill insert for use in steels, corrosion resistant steels, exotics
APKR 1003PDR-HM 28 Helimill insert for use in aluminum alloys, and Machinable plastics
Self Grip insert for parting tool
NT3R KC850 Topnotch insert for OD threading
Topnotch insert for OD grooving
A3 3.91400-010 CS5 A3 deep grooving insert
Extremely small insert for small diameter boring applications