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HSK-A63 (HSK63A) DIN 69893 CTSA precision power milling chuck Ø16–32 mm

Kortools
Availability:
Select a variant to see available quantity pcs.
with VAT without VAT
Price €182.34
(incl. 23% VAT)

Shipping costs are not included in the price.

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Select a product variant:

Individual variants may differ in price

Select HSK63A-CT16SA-90 HSK63A-CT20SA-90 HSK63A-CT25SA-105 HSK63A-CT32SA-105 HSK63A-CT32SA-120
Click Available to show variants with 24h shipping


Product description

HSK-A63 (HSK63A) DIN 69893 CTSA precision power milling chuck, Ø16–32 mm

Power milling chuck with an HSK-A63 taper to DIN 69893 (ISO 12164) in the CTSA precision version. A tool with a cylindrical shank of diameter d is clamped directly in the chuck bore, smaller shanks through SC straight collets. The tightened nut clamps the chuck onto the shank with high force, so the clamping stays rigid in heavy milling, and the holder runout is ≤ 0.005 mm.

Available bore diameters: 16, 20, 25 and 32 mm. Length L = 90 mm (Ø16 and Ø20), 105 mm (Ø25 and Ø32) and 120 mm (Ø32). Select the variant when purchasing.

Applications

  • roughing and heavy cutting with end mills with cylindrical shanks
  • machining of moulds and aerospace and energy equipment parts where high clamping force and rigidity are needed
  • precise work: runout ≤ 0.005 mm (standard HC power chuck: ≤ 0.008 mm)
  • smaller shank diameters through SC straight collets (collets not included)
  • CNC milling machines and machining centres with an HSK-A63 spindle (DIN 69893)

Specification

Taper type HSK-A63 (DIN 69893 / ISO 12164)
Tool clamping power clamping: clamping nut, bore for a cylindrical shank d
Bore diameter d 16, 20, 25 or 32 mm (depending on variant)
Smaller shank diameters with SC straight collets: Ø16: 3–12 mm; Ø20: 3–16 mm; Ø25: 3–20 mm; Ø32: 3–25 mm (collets not included)
Holder runout ≤ 0.005 mm
Balance grade at least G6.3 (if you need G2.5, ask before purchasing)
Coolant AD version (central coolant supply)
Nut tightening hook spanner or ball spanner for nut diameter D (dimension table)
Material case-hardened alloy steel (case depth 0.8 ± 0.2 mm)
Hardness HRC 56–60
HSK taper taper tolerance < AT3, surface roughness Ra < 0.2 µm
Standard DIN 69893 (taper)

Balance grade: at least G6.3. If you need G2.5 for high spindle speeds, write to us before purchasing — we will check the specific piece before shipping.

Coolant: AD version (coolant through the spindle centre). If your spindle supplies coolant in a different way, write to us before purchasing.

Dimension table

Dimension drawing – HSK-A63 (HSK63A) DIN 69893 CTSA precision power milling chuck Ø16–32 mm

The photo shows an HSK-A63 HC power milling chuck; the CTSA chuck is built as shown in the drawing.

Variant d [mm] D [mm] L [mm] SC collets: shanks [mm]
HSK63A-CT16SA-90 16 45 90 3–12
HSK63A-CT20SA-90 20 52 90 3–16
HSK63A-CT25SA-105 25 61 105 3–20
HSK63A-CT32SA-105 32 73 105 3–25
HSK63A-CT32SA-120 32 73 120 3–25

d – bore diameter (tool shank), D – outer diameter of the clamping nut (select the spanner for it), L – length from the HSK flange face (spindle side) to the holder front face, SC collets – range of smaller shanks clamped through straight collets. The drawing shows two versions: Type 1 (CT16, CT20) and Type 2 (CT25, CT32). Dimensions ℓ, L1 and L0 describe the inside and the neck of the holder and are not needed for selection.

Read the complete designation of the selected variant. For example, HSK63A-CT20SA-90 means an HSK-A63 taper, a CTSA power milling chuck with a Ø20 mm bore and length L = 90 mm.

How to select

  • Check that the spindle has an HSK-A63 interface (DIN 69893): HSK-A, HSK-E and HSK-F are different shank forms.
  • Bore d = tool shank diameter (e.g. an end mill with a Ø20 shank = CT20SA). A smaller shank can be clamped through an SC straight collet from the range in the table.
  • The tool shank must be cylindrical.
  • A hook spanner or ball spanner matching diameter D is needed to tighten the nut.

FAQ

Will it fit my machine?
The holder has an HSK-A63 shank to DIN 69893 (ISO 12164). Before purchasing, confirm the form and size of the spindle interface in the machine documentation. HSK-A, HSK-E and HSK-F are different shank forms, and 63 and 100 are different sizes, so the designation “HSK” alone is not sufficient to confirm the selection.

How does it differ from an HC power chuck?
It is the precision version of the power milling chuck: runout ≤ 0.005 mm, compared with ≤ 0.008 mm for HC. Both are designed for heavy milling with high clamping force.

How does it differ from an ER collet chuck?
A power milling chuck clamps the shank with much higher force and rigidity than an ER chuck, so it is suitable for heavy roughing. An ER chuck covers a wider range of diameters by changing the collet.

Are SC collets included?
No. SC straight collets for smaller shanks are selected separately; ask about availability.

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