What is abreast milling?

Abreast milling is the method of simultaneous milling of several parts that are positioned in a row parallel to the milling cutter axis.

What is "pure iron" and how can it be machined?

Pure iron is the general name of low-carbon non-alloy steel that features an extremely high content of iron (Fe) with an overall trace of other chemical elements of up to 0.1%.
Pure iron is referred to commercially as ARMCO (American Rolling Mill Corporation). Shop talk language refers pure iron as "Armco-Iron". Also, pure iron is referred to as "soft magnetic iron".
To machine pure iron, it is recommended to follow ISCAR’s Group 1 (P1) - Material Group Classification guide when selecting the suitable cutting tool and determining the initial cutting data.

What is "pure iron" and how can it be machined?

Pure iron is the general name of low-carbon non-alloy steel that features an extremely high content of iron (Fe) with an overall trace of other chemical elements of up to 0.1%.
Pure iron is referred to commercially as ARMCO (American Rolling Mill Corporation). Shop talk language refers pure iron as "Armco-Iron". Also, pure iron is referred to as "soft magnetic iron".
To machine pure iron, it is recommended to follow ISCAR’s Group 1 (P1) - Material Group Classification guide when selecting the suitable cutting tool and determining the initial cutting data.

Die sinking

in die and mold making, this means machining 3D cavities, especially deep cavities.

Flat drill

normally, this is a synonym for a spade drill, but it often relates to a flat-bottom drill.

Fly bar, flybar

a fly cutter carrying two toolbit inserts.

Jobber drill

an all-purpose twist drill, usually of medium length.

Master (gauge) insert

a specially selected insertmounted on a cutting tool to measure the tool dimensions or to check the tool accuracy parameters.

Parallel land

the wiper flat of a milling cutter. The term "parallel" highlights that the land is generally parallel to the machined surface.

Pocketing

milling pockets and cavities, specifically deep cavities.