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HSK-A63 (HSK63A) DIN 69893 Weldon holder with coolant channels Ø6–40 mm

Kortools
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Price €93.45
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Select a product variant:

Individual variants may differ in price

Select HSK63A-SLA06-65K HSK63A-SLA08-65K HSK63A-SLA10-65K HSK63A-SLA12-80K HSK63A-SLA14-80K HSK63A-SLA16-80K HSK63A-SLA18-80K HSK63A-SLA20-80K HSK63A-SLA25-110K HSK63A-SLA32-110K HSK63A-SLA40-125K
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Product description

HSK-A63 (HSK63A) DIN 69893 Weldon holder with coolant channels, Ø6–40 mm

Weldon (side-lock) milling holder with an HSK-A63 taper to DIN 69893 (ISO 12164) and coolant channels. The tool is clamped by the side flat of the shank (Weldon, DIN 1835 B) and a clamping screw, so the cutter does not rotate in the holder even in heavy milling. Coolant supplied through the spindle centre flows through channels to the front face of the holder, around the tool, and reaches the cutting zone even when the tool has no internal coolant channels.

Available bore diameters: 6, 8, 10, 12, 14, 16, 18, 20, 25, 32 and 40 mm. Length L = 65 mm (Ø6–10), 80 mm (Ø12–20), 110 mm (Ø25 and Ø32) and 125 mm (Ø40). Select the variant when purchasing.

Applications

  • clamping end mills, drills and other tools with a Weldon flat shank (DIN 1835 B)
  • milling with coolant delivered onto the tool from the holder front face, also with tools without internal coolant channels
  • roughing and heavy machining: rigid clamping, the tool does not rotate in the holder
  • CNC milling machines and machining centres with an HSK-A63 spindle (DIN 69893) and through-spindle coolant

Specification

Taper type HSK-A63 (DIN 69893 / ISO 12164)
Tool clamping Weldon (side-lock): shank flat and clamping screw
Bore diameter d 6–40 mm (depending on variant)
Clamping screws 1 screw (Ø6–20 mm) or 2 screws (Ø25–40 mm)
Coolant AD version: coolant through the spindle centre exits through channels at the holder front face, around the tool
Holder runout ≤ 0.005 mm
Balance grade at least G6.3 (many pieces are balanced to G2.5 at 25,000 rpm: ask us and we will check the label of the specific piece)
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), DIN 6359 / DIN 1835 B (Weldon bore)

Balance grade: at least G6.3. Many HSK-A holders of this type are balanced to G2.5 (more precise). If you need G2.5 for high spindle speeds, write to us before purchasing — we will check the label of 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 Weldon holder with coolant channels Ø6–40 mm

The photo shows a standard HSK-A63 Weldon holder with one clamping screw; the coolant channel version has coolant outlets on the front face, as shown in the drawing, and sizes Ø25–40 have two clamping screws.

Variant d [mm] D [mm] L [mm] M (screw) Number of screws
HSK63A-SLA06-65K 6 25 65 M6 1
HSK63A-SLA08-65K 8 28 65 M8 1
HSK63A-SLA10-65K 10 35 65 M10 1
HSK63A-SLA12-80K 12 42 80 M12 1
HSK63A-SLA14-80K 14 44 80 M12 1
HSK63A-SLA16-80K 16 48 80 M14 1
HSK63A-SLA18-80K 18 50 80 M14 1
HSK63A-SLA20-80K 20 52 80 M16 1
HSK63A-SLA25-110K 25 65 110 M18×2 2
HSK63A-SLA32-110K 32 72 110 M20×2 2
HSK63A-SLA40-125K 40 80 125 M20×2 2

d – bore diameter (tool shank), D – body diameter, L – length from the HSK flange face (spindle side) to the holder front face, M – clamping screw thread.

Read the complete designation of the selected variant. For example, HSK63A-SLA16-80K means an HSK-A63 taper, a Weldon (SLA) holder for a Ø16 mm shank and length L = 80 mm, K – with coolant channels.

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 diameter d = tool shank diameter (e.g. an end mill with a Ø16 shank = variant SLA16).
  • The tool shank must have a Weldon flat (DIN 1835 B); the clamping screw presses on this flat.
  • The holder coolant channels work when the spindle supplies coolant through the centre (AD version).

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 a standard Weldon holder?
It has channels through which the coolant from the spindle exits at the holder front face, around the tool. In a standard Weldon holder the coolant flows only through the centre, so it reaches the cutting edges only through the tool's internal channels.

Does the tool need a Weldon flat?
Yes. The holder clamps shanks with a flat to DIN 1835 B (Weldon). For shanks with an inclined flat (Whistle Notch, DIN 1835 E) choose a Whistle Notch holder.

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