Secomax™ CH2540 - Wiper inserts not just for increased surface finish

The new CH2540 has bimodal grain size distribution, where fine grained cBN (1 µm) with 15 µm grains added to the structure. One advantage of this type of structure is the crack deflection that the coarser grains cause.

Implementation of wiper geometries allows for feed rates of 300 percent of what could be attained with standard inserts, while achieving the same level of surface finish.

The tough CH2540 grade has once again proven successful during these cutting conditions.

At this customer has feed rate been increased from 0.14 mm/rev to 0.40 mm/rev and tool life from 500 parts to 800 parts.

This is not just a reduction of Time in cut with 65% it is also an increased tool life with 65%.

This is a true winning solution that will give the customer a real and quick cost saving.

For more information, please contact your local Seco representative, or our Advanced material (PCBN/PCD/CERAMIC) team.

Per Ola Jönander
737 82 Fagersta, Sweden
Office +4622340818
Mobile +46703163555
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Chip breaker on PCBN reduces down-time

In finishing turning of hardened steel components, where the hardness is 60-62 HRC with CBN, a chip breaker is not needed, but when the hardness is lower, problems with long chips can occur. This was the case at one customer machining components with a hardness of 50 HRC.

The solution was to use inserts with chip breaker, and chip breaking was improved, and as an added bonus tool life was also longer than with the competitor insert.

Seco Tools has been very active in the area of machining case hardened steel for many years.

After heat treatment, gearbox components like gears and shafts usually have a hardness of 60-62 HRC. During the subsequent hard turning, chip control is not a problem, the chips are brittle and will break also without a chip breaker.

When machining components with a lower hardness, there can be problems with long and stringy chips, which can scratch the surface, interfere with the tool holder and clamping or otherwise negatively impact the machining operation, increasing the need for machine stops to clean the machine.

In this case, the hardness of a shaft was only 50 HRC, and the customer had problems with chips scratching the surface. The Seco solution was to use a chip breaker insert.

With the chip breaker insert, there was no need to stop the machine and remove chips anymore, resulting in a much more trouble-free production, and reducing the machine down-time.

For more information, please contact your local Seco representative, or our Advanced material (PCBN/PCD/CERAMIC) team.

Henrik Sandqvist
SECO TOOLS Shanghai CO., Ltd. Building 4, No 797,
Puxing Road, Pujiang Town, Minhang District,
Shanghai 201114, China
Office: +86 21 5426 5849
Mobile: +86 185 1520 6942

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