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New FAQ November 2019

For section "Milling"
QUESTION
What is a router?
ANSWER
In machining, the term "router" has several meanings. It may refer to a rotating tool for hollowing out ("routing") wood and plastic materials. "Router" refers also to a 3-axis CNC machine for cutting soft materials, such as wood, using a rotating tool. In metalworking, a "router" usually means an endmill, intended for milling aluminum at high cutting and feed speeds.
QUESTION
Flute or chip gullet?
ANSWER
In milling cutter terminology, both words designate a chip space or a chip pocket – the shaped area of a milling cutter body that is intended for the flow of chips that are formed as a result of cutting. This space must be sufficient to enable a free, unrestricted chip flow. The term "chip gullet" is generally used to specify the chip space of indexable milling cutters, whereas "flute" is mainly applied to a solid mill design, where it means a helical groove that ensures chip flow and produces a sharp cutting edge or a mill tooth by one of its edges.
QUESTION
Chip breaker or chip former?
ANSWER
A chip breaker is an area of a tool rake face that is specially shaped for breaking or controlling (forming) the produced chip. The term "chip breaker" is commonly used in turning operations, where breaking a long chip is one of the key success factors. In milling, the term "chip former" is generally used, as milling is an interrupted, "chip breaking" cutting process that focuses on chip forming.
For section "Shop Talk (Professional slang)"
QUESTION
Spanner or wrench?
ANSWER
Both words mean the same: a tool, mainly operated by hand, for tightening/untightening parts like bolts, nuts etc. or for preventing a rotational movement of the parts. "Spanner" is more common in UK English and "wrench" in US English.
QUESTION
BAHCO
ANSWER
Swedish company founded by Johan Petter Johansson, inventor of the plumber pipe wrench. Today, the word "Bahco" is also used as a slang term for an adjustable pipe wrench.
QUESTION
Crest Cut End Mill
ANSWER
Slang term derived from "CREST-KUT®" end mills; refers to a specific design featuring a wavy cutting edge, which was initially introduced for high speed steel milling cutters.
For section "Engineering Materials"
QUESTION
What is Vitallium and how to machine this material?
ANSWER
Vitallium is a cobalt (Co)-chrome (Cr) alloy that contents approximately 60% of Co, 30% of Cr, 8% of molybdenum and some other elements. Vitallium was developed in the 1930's, and is now used mainly in joint replacement surgery and dental medicine. The alloy is hard-to-machine. Cutting data should be set according to recommendations, related to ISCAR material groups 34 and 35.