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    T640 • DIN 371 and 376 • Form C Semi-Bottoming Chamfer • Metric • For Cast Iron and Cast Aluminum

    Beyond™ Straight-Flute HSS-E-PM Taps • Through and Blind Holes

    Material Number4035468

    ISO Catalog IDT640M200X250R6HX-D6ANSI Catalog IDT640M200X250R6HX-D6

    T640 STFL mm Threading - 4035468 - Kennametal
    T640 STFL mm Threading - 4035468 - Kennametal
    T640 STFL mm Threading - 4035468 - Kennametal
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    T640 STFL mm Threading - 4035468 - Kennametal
    T640 STFL mm Threading - 4035468 - Kennametal
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    • K Cast Iron
    • N Non-Ferrous
    • Tapping: Through HoleTapping: Through Hole
    • Threading: Blind HoleThreading: Blind Hole
    • Class of Fit: 6HXClass of Fit: 6HX
    • DIN number 371DIN number 371
    • DIN number 376DIN number 376
    • Chamfer Form C (2–3)Chamfer Form C (2–3)
    • HSS-E-PMHSS-E-PM
    • Manufacturer’s Specs: MManufacturer’s Specs: M
    • Flood Coolant: TappingFlood Coolant: Tapping
    • Tapping Helix Angle: 0°Tapping Helix Angle: 0°
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    Drawings for 4035468
    Metric
    Inch
    Material Number4035468
    ISO Catalog IDT640M200X250R6HX-D6
    ANSI Catalog IDT640M200X250R6HX-D6
    GradeKP6525
    [D1-TDZ] Thread Diameter SizeM20 X 2,5
    [L] Overall Length 140 mm
    [L] Overall Length 5.51 in
    [L3] Thread Length 25 mm
    [L3] Thread Length .98 in
    [L2] Useable Length 64 mm
    [L2] Useable Length 2.52 in
    [D] Adapter / Shank / Bore Diameter16 mm
    [D] Adapter / Shank / Bore Diameter.6299 in
    [Z] Number of Flutes4
    Dimension StandardDIN 376
    Thread Tolerance Class ISO6HX-I
    See all Product Variants

    Workpiece Materials

    • Cast Iron
    • Non-Ferrous

    Uses and application

    • Tapping: Through HoleTapping: Through Hole
    • Threading: Blind HoleThreading: Blind Hole
    • Class of Fit: 6HXClass of Fit: 6HX
    • DIN number 371DIN number 371
    • DIN number 376DIN number 376
    • Chamfer Form C (2–3)Chamfer Form C (2–3)
    • HSS-E-PMHSS-E-PM
    • Manufacturer’s Specs: MManufacturer’s Specs: M
    • Flood Coolant: TappingFlood Coolant: Tapping
    • Tapping Helix Angle: 0°Tapping Helix Angle: 0°

    Features and benefits

    • KP6525 TiCN + TiN for cast iron and cast aluminum.

    Create Solution to calculate Feeds and Speeds

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    Tolerance

    shank tolerance
    D fractionalD inch
    .250–.375+0, -.0004
    .438–.625+0, -.0004
    shank tolerance
    Dtolerance h6 + / -
    6+0, -0,008
    8 10+0, -0,009
    12 16+0, -0,011
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    Product Name
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    RC3 Solid tap adapters
    RC3 Solid tap adapters
    1128251
    RC3TA160125M220
    RC3TA160125M220
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    RC2 Solid tap adapters
    RC2 Solid tap adapters
    1128590
    RC2TA160120M200
    RC2TA160120M200
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    ER Standard Tap Collets • Metric DIN and ISO
    ER Standard Tap Collets • Metric DIN and ISO
    1128795
    32ERTC160120M
    32ERTC160120M
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    ER Standard Tap Collets • Metric DIN and ISO
    ER Standard Tap Collets • Metric DIN and ISO
    1135985
    40ERTC160120M
    40ERTC160120M
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    RC3 Solid tap adapters
    RC3 Solid tap adapters
    1138531
    RC3TA160120M200
    RC3TA160120M200
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    RC2 Solid tap adapters
    RC2 Solid tap adapters
    1138641
    RC2TA160125M220
    RC2TA160125M220
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    DA L series - Tap Collets
    DA L series - Tap Collets
    1281839
    LTC160120M
    LTC160120M
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    ER Standard Tap Collets • Metric DIN and ISO
    ER Standard Tap Collets • Metric DIN and ISO
    1876644
    25ERTC160120M
    25ERTC160120M
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