HSK-A63 / HSK-A100 (HSK63A / HSK100A) DIN 69893 Weldon Side-Lock Holder
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5-axis vise with hard jaws
Self-centering machine vise. Hard jaws included.
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Product code: F157-9441A
Product description
HSK-A63 / HSK-A100 Weldon side-lock holder DIN 69893 (HSK63A, HSK100A)
Weldon (side-lock) end mill holder with an HSK-A63 or HSK-A100 taper to DIN 69893 (ISO 12164). The tool is secured by its Weldon flat and a clamping screw, providing rigid, secure clamping that prevents the end mill from rotating in the holder even during heavy rough milling.
HSK-A63: bore diameters from 6 to 40 mm in lengths from 65 to 160 mm. HSK-A100: bore diameters from 8 to 50 mm in lengths from 80 to 130 mm. Select the variant when purchasing.
Applications
- holding end mills with a Weldon flat
- rough milling and heavy machining where rigid, secure clamping is required
- CNC milling machines and machining centres with an HSK-A63 or HSK-A100 spindle (DIN 69893)
Specification
| Taper type | HSK-A63 or HSK-A100 (DIN 69893 / ISO 12164), according to the variant code |
| Tool shank type | Weldon (side-lock) |
| Bore diameter | 6–50 mm (depending on variant) |
| Clamping screws | 1 screw (Ø6–20 mm) or 2 screws (Ø25–50 mm) |
| 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) |
| Coolant | AD version (central coolant supply) |
| 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 (HSK-A63 and HSK-A100) 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. If your spindle supplies coolant in a different way, write to us before purchasing.
Dimension table
The photo shows a holder with one clamping screw; sizes Ø25–50 have two clamping screws.
HSK-A63 (HSK63A)
| Variant | d [mm] | D [mm] | L [mm] | M (screw) | Number of screws |
| HSK63A-SLN06-65 | 6 | 25 | 65 | M6 | 1 |
| HSK63A-SLN06-100 | 6 | 25 | 100 | M6 | 1 |
| HSK63A-SLN06-160 | 6 | 25 | 160 | M6 | 1 |
| HSK63A-SLN08-65 | 8 | 28 | 65 | M8 | 1 |
| HSK63A-SLN08-100 | 8 | 28 | 100 | M8 | 1 |
| HSK63A-SLN08-160 | 8 | 28 | 160 | M8 | 1 |
| HSK63A-SLN10-65 | 10 | 35 | 65 | M10 | 1 |
| HSK63A-SLN10-100 | 10 | 35 | 100 | M10 | 1 |
| HSK63A-SLN10-160 | 10 | 35 | 160 | M10 | 1 |
| HSK63A-SLN12-80 | 12 | 42 | 80 | M12 | 1 |
| HSK63A-SLN12-160 | 12 | 42 | 160 | M12 | 1 |
| HSK63A-SLN14-80 | 14 | 44 | 80 | M12 | 1 |
| HSK63A-SLN14-100 | 14 | 44 | 100 | M12 | 1 |
| HSK63A-SLN14-160 | 14 | 44 | 160 | M12 | 1 |
| HSK63A-SLN16-80 | 16 | 48 | 80 | M14 | 1 |
| HSK63A-SLN16-100 | 16 | 48 | 100 | M14 | 1 |
| HSK63A-SLN16-160 | 16 | 48 | 160 | M14 | 1 |
| HSK63A-SLN18-100 | 18 | 50 | 100 | M14 | 1 |
| HSK63A-SLN18-160 | 18 | 50 | 160 | M14 | 1 |
| HSK63A-SLN20-80 | 20 | 52 | 80 | M16 | 1 |
| HSK63A-SLN20-100 | 20 | 52 | 100 | M16 | 1 |
| HSK63A-SLN20-160 | 20 | 52 | 160 | M16 | 1 |
| HSK63A-SLN25-110 | 25 | 65 | 110 | M18×2 | 2 |
| HSK63A-SLN25-160 | 25 | 65 | 160 | M18×2 | 2 |
| HSK63A-SLN32-110 | 32 | 72 | 110 | M20×2 | 2 |
| HSK63A-SLN32-160 | 32 | 72 | 160 | M20×2 | 2 |
| HSK63A-SLN40-125 | 40 | 80 | 125 | M20×2 | 2 |
HSK-A100 (HSK100A)
| Variant | d [mm] | D [mm] | L [mm] | M (screw) | Number of screws |
| HSK100A-SLN08-80 | 8 | 28 | 80 | M8 | 1 |
| HSK100A-SLN10-80 | 10 | 35 | 80 | M10 | 1 |
| HSK100A-SLN12-80 | 12 | 42 | 80 | M12 | 1 |
| HSK100A-SLN14-80 | 14 | 44 | 80 | M12 | 1 |
| HSK100A-SLN16-100 | 16 | 48 | 100 | M14 | 1 |
| HSK100A-SLN18-100 | 18 | 50 | 100 | M14 | 1 |
| HSK100A-SLN20-100 | 20 | 52 | 100 | M16 | 1 |
| HSK100A-SLN25-100 | 25 | 65 | 100 | M18×2 | 2 |
| HSK100A-SLN32-100 | 32 | 72 | 100 | M20×2 | 2 |
| HSK100A-SLN40-105 | 40 | 80 | 105 | M20×2 | 2 |
| HSK100A-SLN50-130 | 50 | 100 | 130 | M24×2 | 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.
How to select
- Check whether the spindle has an HSK-A63 or an HSK-A100 interface and select a variant with that taper: the code starts with HSK63A or HSK100A.
- Bore diameter = end mill shank diameter (e.g. an Ø16 end mill = a 16 bore).
- The end mill must have a Weldon flat (clamping screw fastening).
- Longer versions provide greater reach; shorter versions provide maximum rigidity.
FAQ
Will it fit my machine?
The holder has an HSK-A63 or HSK-A100 shank to DIN 69893 (ISO 12164), according to the variant code. 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 Weldon differ from ER?
Weldon secures the end mill by its flat and a screw, providing greater rigidity during heavy milling; ER is a general-purpose system for plain shanks.
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