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General Characteristics of the Latest ISCAR Lines of
Indexable Tools for 90˚ Milling

No mismatch
In machining square shoulders by indexable milling tools, the shoulder height can be more than
a tool depth of cut (D.O.C.) that is determined by the length of cutting edge of an insert clamped in
the tool. In this case the shoulder machining needs two or more continuous passes. Ensuring true
90˚ shoulder profile without a detectible border, steps, marks or burrs between the passes –
no mismatch – is an essential feature of modern precise indexable milling tools intended for milling
square shoulders.
Use of such tools substantially improves productivity by eliminating additional finish cuts and ensures
the high-accuracy profile with good surface finish. Perpendicularity of the shoulder wall to its base of
no more than 0.02 mm is today a normal requirement to the “no mismatch” milling tools.

HELITANG T490 is a family of milling tools that uses tangentially clamped inserts with four right-
hand helical cutting edges. The T490 inserts are available in 8, 12.5 and 16 mm long cutting
edges. The smallest tool diameter is 16 mm, with 2 teeth. The line offers the tools in different
configuration: end and face mills, replaceable milling heads for ISCAR MULTI-MASTER and
Milling Tools
FLEXFIT systems; and the tools are available with coarse or fine pitch. Most of the tools are
provided with holes for internal coolant supply. The tools are intended for milling square shoulders
at high rates, with no mismatch and they are capable of plunging as well.
The family features high durability and outstanding tool life, due to the tangentially oriented pocket,
the most advanced insert production technology and excellent grade combination.
It is interesting to note that none of ISCAR competitors can offer such a small tangential insert as
the T490 LN.. 0804PN-R with four cutting edges.

HELIDO H490, a family of tools for 90˚ milling, is an evolution of the original ISCAR HELIMILL line.
The H490 AN.. X laydown (radial) insert has 4 right-hand cutting edges. There are 3 standard sizes
of the insert with cutting edge lengths 8, 12 and 16 mm.
Insert construction is very thick and strong. It is clamped into a dovetail inclined pocket, which
provides a very rigid clamping, and has a wiper that leaves an excellent surface finish. Due to its
strong construction, unique chip deflector with positive rake angles and good grade combinations,
the family stands out high durability, low cutting forces and long tool life. The tools, which are
produced with coolant holes, can machine 90˚ shoulders with no mismatch, plunge with large
stepover and can perform milling slots and faces.
This family combines the most advantageous features of both the HELIMILL – helical cutting edge
and positive rake angles; and the MILL2000 – strong construction, most suited for heavy milling
applications.

3P ISCAR Premium Productivity Products
Since 2007 this symbol started coming into view on packages of various ISCAR products and on
pages of leaflets. The symbol stands for new tools, inserts and toolholders, which are
manufactured in accordance with the advanced designed principles and the latest technology,
and allow to the customer substantial productivity increase.
In addition to the progressive cutting geometry, the key features of the 3P cutting inserts are the new
SUMO TEC carbide grades with their special post-coating treatment.

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