Ball mill
– a ball-nose milling cutter. The correct meaning of “ball mill” is a
grinding device for grinding materials into powder.
Bull-nose
– a milling cutter, a replaceable milling head or insert of toroidal
cutting profile.
Cubic
– metal removal rate (MRR) in cubic mm, cm or inches.
Feed mill
– a fast feed (high feed) milling cutter.
Grade
–a specific type of cutting tool material. In particular, “carbide grade”
relates to a type of cemented carbide.
High positive
– a feature of cutting geometry that relates mainly to the rake angle of a
tool. For tools with high positive geometry, the rake angle is
significantly greater than common values.
Inconel
– Inconel is the trade name for a group of more than 20
metal alloys made by Special Metals Corporation. When followed by a number
(e.g. Inconel 625), it is a specific material from a
family of nickel-chromium-based high temperature alloys. Without a number
following, Inconel often refers to a whole group of
nickel-based superalloys.
Nirosta
– stainless steel, normally austenitic.
Plunger
– a plunge milling cutter.
Porky
(porcupine) – an extended flute (long-edge) indexable
milling cutter
Positive insert
– this may relate to two different features of an indexable insert:
1. Insert where the insert bottom face is smaller than the insert top face.
2. Inclination of the insert cutting edge that generates a positive axial
rake of a tool, when the insert is mounted in the tool.
This dual meaning sometimes causes serious misunderstandings.
Slocombe (Slocomb) drill
– a center drill.
Slotter
– in milling, this term defines slot milling cutter;
however it normally refers to a type of planing machine tool.
Slotting
– Originally, this term defined a machining process where a single-point
cutting tool moves linearly and piston wise, and a workpiece is fixed or
moves only in linear direction. However, today this term relates more to
slot milling.
Slotting cutter
– Slot milling cutter (see above)
Titanium beta (β)
– in most cases it is a beta-annealed α-β-titanium alloy, although sometimes it
means a β-titanium alloy.
Whiskers
- whisker-reinforced ceramic.