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M42 Cobalt Jobber Length

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PRODUCT CATALOG >> M42 Cobalt Jobber Length NAS 907J

Type 150 M42 Cobalt 135° Split point – Jobber Length
    M42 Cobalt Jobber Length — 135° Split Point
    Manufactured from M42 high speed steel contains 8% cobalt increasing hot hardness.

    Cobalt drills require rigidly held positive feed drilling equipment

    Recommended: use to drill hard tough metals, free machining stainless steel, titanium alloys and certain abrasive plastics.
    Adobe Acrobat PDF DOWNLOAD: PDF

 

Type 150-N TiN Coated, M42 Cobalt 135° Split point – Jobber Length
    TiN M42 Cobalt Jobber Length — 135° Split Point
    Manufactured from M42 High speed steel contains 8% cobalt increasing hot hardness.

    Titanium nitride coating for lubricity and extended tool life.

    Cobalt drills require rigidly held positive feed drilling equipment.
    Type 150-N TiN Coated, M42 Cobalt 135° Split point – Jobber Length DOWNLOAD: PDF

 

Type 150-ALN M42 Cobalt Titanium Aluminum Nitride Jobber Length 135° Split Point
    M42 Cobalt Titanium Aluminum Nitride – NAS 907J
    Titanium Aluminum Nitride can be used in machining stainless steel, nickel based and titanium alloys, not recommended for aluminum.

    Titanium aluminum nitride designed for use where extreme temperatures are found, allows for increased machining speeds up to 200%.

    Manufactured to NAS 907J specifications.
    Type 150-ALN M42 Cobalt Titanium Aluminum Nitride Jobber Length DOWNLOAD: PDF

 

Type 150-M METRIC, M42 Cobalt 135° Split point – Jobber Length
    METRIC — M42 Cobalt Jobber Length — 135° Split Point
    Manufactured from M42 High Speed Steel contains 8% cobalt increasing hot hardness.

    Cobalt drills require rigidly held positive feed drilling equipment.

    Manufactured to NAS 907J specification.
    Type 150-M METRIC, M42 Cobalt 135° Split point – Jobber Length DOWNLOAD: PDF

M42 exhibits excellent wear resistance by virtue of high heat-treated hardness (68 to 70 HRC), and the high cobalt content imparts the hot hardness.

As such, the cutting edges on tools made from M42 super high speed steel stay sharp and hard in heavy-duty and high-production cutting applications. M42 is also "less prone" to chipping when used for interrupted cuts and costs less when compared to the same tool made of carbide.

Reminder, that the cutting edge chipping is never acceptable and all efforts should be made to minimize or eliminate.

To increase the life of high-speed steel, tools are sometimes coated; one such coating is TiN -Titanium Nitride.

Most coatings generally increase a tool's hardness and or lubricity. While adding a layer of protection from heat do to friction between the material being drilled and the cutting edge.

A coating allows the cutting edge of a tool to cleanly pass through the material also assist to decrease the temperature associated with the cutting process and increase the life of the tool.

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