HSK-A63 (HSK63A) DIN 69893 slim shrink fit chuck 3°, Ø3–16 mm
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5-axis vise with hard jaws
Self-centering machine vise. Hard jaws included.
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Product code: 6BA4-322C1
Product description
HSK-A63 (HSK63A) DIN 69893 slim shrink fit chuck 3°, Ø3–16 mm
Slim shrink fit chuck with a HSK-A63 taper to DIN 69893 (ISO 12164) taper. The clamping section has a 3° angle (standard shrink fit chuck: 4.5°), so the chuck is narrower at the front: for a Ø6 mm shank the front diameter D is 12 mm (standard: 21 mm). A cylindrical-shank tool is clamped without a collet: the heated bore of the chuck expands, the shank is inserted to the set depth, and as the chuck cools down it clamps the shank around its full circumference. The tool is removed after heating the chuck again.
A shrink fit chuck requires an induction shrink fit unit: without heating, the tool cannot be inserted or removed. The shrink fit unit is not included.
Available for shank diameters Ø3–16 mm in length L = 80 mm (Ø3–8), 85 mm (Ø10), 90 mm (Ø12) and 95 mm (Ø16), and in extended versions L = 120 and 160 mm. Select the variant when purchasing. Diameters Ø3 and Ø4 mm have no stop screw thread (G “–”): set the tool by its insertion depth.
Applications
- clamping end mills, drills and reamers with cylindrical shanks, most often made of solid carbide, especially small diameters
- machining in deep and narrow cavities: the slim 3° clamping section reduces the risk of collision
- precise machining: holder runout ≤ 0.003 mm
- high tool clamping force
Specification
| Taper type | HSK-A63 (DIN 69893 / ISO 12164) |
| Tool clamping | shrink fit, slim clamping section with a 3° angle |
| Tool shank diameter d | 3, 4, 6, 8, 10, 12 or 16 mm (depending on variant) |
| Tool shank | cylindrical, with a diameter equal to d of the variant |
| Chuck diameter at the front face D | 9–22 mm (depending on variant) |
| Length L | 80–160 mm (depending on variant) |
| Holder runout | ≤ 0.003 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) |
| Coolant | AD version (central coolant supply) |
| Tool projection setting | thread G for a stop screw in the bore (dimension table), adjustment range 10 mm; the smallest diameters have no thread G (“–” in the table) |
| Tool insertion and removal | induction shrink fit unit (not included) |
| Standard | DIN 69893 / ISO 12164 (taper) |
Balance grade: at least G6.3. Many shrink fit chucks of this series are balanced to G2.5 at 25,000 rpm (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. If your spindle supplies coolant in a different way, write to us before purchasing.
Dimension table
| Variant | d [mm] | D [mm] | D1 [mm] | L [mm] | L2 [mm] | L1 [mm] | G |
| HSK63A-SFS03-80 | 3 | 9 | 14 | 80 | 54 | – | – |
| HSK63A-SFS03-120 | 3 | 9 | 18.4 | 120 | 94 | – | – |
| HSK63A-SFS03-160 | 3 | 9 | 22.5 | 160 | 134 | – | – |
| HSK63A-SFS04-80 | 4 | 10 | 15.4 | 80 | 54 | – | – |
| HSK63A-SFS04-120 | 4 | 10 | 19.4 | 120 | 94 | – | – |
| HSK63A-SFS04-160 | 4 | 10 | 23.5 | 160 | 134 | – | – |
| HSK63A-SFS06-80 | 6 | 12 | 17.4 | 80 | 54 | 36 | M5 |
| HSK63A-SFS06-120 | 6 | 12 | 21.4 | 120 | 94 | 36 | M5 |
| HSK63A-SFS06-160 | 6 | 12 | 25.5 | 160 | 134 | 36 | M5 |
| HSK63A-SFS08-80 | 8 | 14 | 19.4 | 80 | 54 | 36 | M6 |
| HSK63A-SFS08-120 | 8 | 14 | 23.4 | 120 | 94 | 36 | M6 |
| HSK63A-SFS08-160 | 8 | 14 | 27.5 | 160 | 134 | 36 | M6 |
| HSK63A-SFS10-85 | 10 | 16 | 21.8 | 85 | 59 | 42 | M8×1 |
| HSK63A-SFS10-120 | 10 | 16 | 25.4 | 120 | 94 | 42 | M8×1 |
| HSK63A-SFS10-160 | 10 | 16 | 29.5 | 160 | 134 | 42 | M8×1 |
| HSK63A-SFS12-90 | 12 | 18 | 24.4 | 90 | 64 | 47 | M10×1 |
| HSK63A-SFS12-120 | 12 | 18 | 27.4 | 120 | 94 | 47 | M10×1 |
| HSK63A-SFS12-160 | 12 | 18 | 31.5 | 160 | 134 | 47 | M10×1 |
| HSK63A-SFS16-95 | 16 | 22 | 28.7 | 95 | 69 | 50 | M12×1 |
| HSK63A-SFS16-120 | 16 | 22 | 31.4 | 120 | 94 | 50 | M12×1 |
| HSK63A-SFS16-160 | 16 | 22 | 35.5 | 160 | 134 | 50 | M12×1 |
d – bore diameter (tool shank), D – chuck diameter at the front face, D1 – diameter at the base of the 3° tapered section, L – length from the flange face (spindle side) to the chuck front face, L2 – length from the front surface of the flange to the chuck front face, L1 – maximum shank insertion depth, G – thread of the stop screw for setting the tool projection (adjustment range 10 mm), N – stop screw adjustment range (10 mm), “–” – no thread.
Read the complete designation of the selected variant. For example, HSK63A-SFS12-90 means a HSK-A63 taper, a slim 3° shrink fit chuck (SFS) for a Ø12 mm shank and length L = 90 mm.
How to select
- Check that the spindle has an HSK-A63 interface (form A, size 63).
- Diameter d = tool shank diameter (e.g. an end mill with a Ø12 shank = a variant with “12” in the code). The shank must be cylindrical.
- Choose the slim version for small tools and deep, narrow cavities; under heavy load a shorter, thicker 4.5° chuck is stiffer.
- An induction shrink fit unit is needed to insert and remove the tool.
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, so the designation “HSK63” alone is not sufficient to confirm the selection.
Do I need a shrink fit unit?
A shrink fit chuck requires an induction shrink fit unit: without heating, the tool cannot be inserted or removed. The shrink fit unit is not included.
Which tools can be clamped?
Tools with a cylindrical shank with a diameter equal to d of the selected variant, most often made of solid carbide. The insertion depth must not exceed L1 from the dimension table.
How does it differ from a standard shrink fit chuck?
It has a slim clamping section with a 3° angle instead of 4.5°, so it is narrower at the front (for Ø6 mm: D = 12 mm instead of 21 mm). This makes work in deep and narrow cavities easier. The tool clamping method is the same.
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