BT40-ER32 HiRunER precision ER collet chuck

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HiRunER precision ER collet chuck 32 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, ER clamping wrenches No. 309748 − 309749.


  • Clamps only nominal ⌀ up to shank ⌀ tolerance h10.
  • Clamping nut not in combination with sealing washer.


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