Hoffmann Group Home
  • 500.000 listed articles
  • Delivery in 48h
  • TÜV certified quality of delivery
      • Menu
      Article no.: 302844

      HiRunER precision ER collet chuck BT 40 A = 100

      Brand: GARANT
      Machining strategy HSC
      Machining strategy HPC
      Shape ADB
      Balance quality G at rotational speed G 2.5 at 25,000 rpm
      Concentricity ≤ 3
      Arbor standard JIS B6339
      Arbor standard ISO 7388-2

      HiRunER precision ER collet chuck BT 40 A = 100

      on request
      In stock
      2 pieces in stock
      On request
      Item no longer available
      Available in 1-3 working days
      Available in 4-6 working days
      Available in 1-2 weeks
      Subsequent delivery
      Unit price
      from  CHF 152.00
      plus VAT at the current rate Prices plus delivery costs
      for ER collets (ER)



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


      • 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.


      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. 308760 − 308806, PS wrenches No. 308810 − 308830, ER collets No. 308881 − 309434, Fahrion brand ER collets 308901 - 309434, ER clamping wrenches No. 309748 − 309749.


      • 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.

      Technical Data

      Balance quality G at rotational speed
      G 2.5 at 25,000 rpm 
      BT 40 A = 100 
      Balluffchip bore
      ≤ 3 µm
      loading spinner image
      loading spinner image