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HiRunER precision ER collet chuck 20

Article no.: 302843 20

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for ER collet size Unit price incl. VAT
  • Arbor standard: JIS B6339; ISO 7388-2
  • Shape: ADB
  • Balance quality G at rotational speed: G 2.5 at 25,000 rpm
  • Concentricity: ≤ 3
  • Machining strategy: HSC; HPC

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    Product details

    Technical Data

    Clamping ⌀ D1 1-13 mm
    Adapter BT 40 A = 70
    Arbor standard JIS B6339; ISO 7388-2
    Shape ADB
    Balance quality G at rotational speed G 2.5 at 25,000 rpm
    Concentricity ≤ 3 µm
    Machining strategy HSC; HPC
    Clamping range 1 mm - 13 mm
    Overhang dimension A 70 mm
    External ⌀ D 38 mm
    Spare ER clamping nut No. 309617 20
    ER chuck key No. 309748; No. 309749 20
    Balluffchip bore yes
    Type of product Collet chuck

    Identification numbers & Classifications

    Article number 302843 20
    EAN / GTIN 4062406520137
    Manufacturer number 302843 20

    Description

    Version:

    External and internal tapers are ground. All shanks are hard turned for smooth running. Including RFID / Balluffchip bore, high-performance clamping nut (up to 25000 rpm).

    Advantage:

    • Excellent concentricity in the system (chuck + collet + clamping nut), 3µm radial run-out with a 2µm collet, 6µm radial run-out with a 5µm collet.
    • Extremely strong holding force (up to factor 2 better than the standard ER chuck).
    • Vibration reduction effect due to 2-part clamping nut.

    Application:

    For clamping tools with plain shank in collets to DIN 6499 − Form A and B.

    Supplied with:

    Precision clamping nut.

    Optional extras:

    Pull studs (PS) No. 308760308802, PS wrenches No. 308820308835, ER chuck keys No. 309757, 309758 (for 11M and 16M); ER collets Fahrion No. 308901309434. ER collets No. 308901309432, hook spanner 628400 or torque wrench 309749 or 628520.

    Note:

    • Clamps only nominal ⌀ up to shank ⌀ tolerance h 10.
    • Do not use the clamping nut in combination with a sealing washer.
    • Use it in only combination with Fahrion collets.
    • The blue design ring must be removed for Fahrion HP 2µm ER collets.

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