Article no.: 307557 20

Hydraulic clamping chuck HT 20 mm

Brand: HOLEX
Arbor standard ISO 12164-1
Arbor standard DIN 69893
Concentricity ≤ 3
Shape A
Machining strategy HSC
Machining strategy HPC
Balance quality G at rotational speed G 2.5 at 25,000 rpm

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  • Very high total rigidity due to optimised design.
  • With Balluffchip bore.
  • Axial length adjustment available, adjustment travel 10 mm.
  • Flexible due to the use of reducing sleeves.


  • Very high transmitted torque (550 Nm), providing high process reliability.
  • Ideal damping characteristics, resulting in optimum surface finishes, increased tool life and spindle protection.


  • Especially for heavy-duty milling.
  • For clamping tools with shank tolerance h6.

Supplied with:

Hexagon socket drive with T-handle.

Optional extras:

Coolant pipe No. 309880, coolant pipe wrench No. 309890


Caution in the case of extra-long tools and TPC machining.

Technical Data

Clamping ⌀ D1
20 mm
HSK-A 100 short
Arbor standard
ISO 12164-1; DIN 69893
Balance quality G at rotational speed
G 2.5 at 25,000 rpm
≤ 3 µm
Machining strategy
Overhang dimension A
90 mm
External ⌀ D
52.5 mm
Reach L1
61 mm
suitable reducing adapter
302150; 302155; 302160; 302165
Type of product
Hydraulic clamping chuck

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