SK (ISO) tool holders
SK (ISO) Heavy-Duty Hydraulic Chucks – SK30, SK40 and SK50 (DIN 69871)
A heavy-duty hydraulic chuck is a hydraulic chuck for milling that takes HIS reduction sleeves. PTP makes them with an SK (ISO) shank (DIN 69871 / ISO 7388-1) in SK30, SK40 and SK50: bores Ø12–32 mm, gauge lengths 58–90 mm, 7 ordering codes in all. They are pulled into the spindle by DIN 69872 pull studs: M12 on SK30, M16 on SK40 and M24 on SK50. Taper AT3 or better.
Heavy-Duty Hydraulic Chucks, SK (ISO) shank
PTP catalogue drawing, dimensions in mm
All 7 SK (ISO) heavy-duty hydraulic chucks (HYDH)
One table per taper size. Every ordering code opens its own page with its dimensions (mm).
SK30 heavy-duty hydraulic chucks (HYDH): 2 ordering codes
| Ordering code | Bore Ø (d) | Gauge Length (GPL) | C | L |
|---|---|---|---|---|
| 47ISO30HYDH1269 | 12 mm | 69 mm | 42 mm | 35 mm |
| 47ISO30HYDH2090 | 20 mm | 90 mm | 50 mm | 46 mm |
SK40 heavy-duty hydraulic chucks (HYDH): 2 ordering codes
| Ordering code | Bore Ø (d) | Gauge Length (GPL) | C | L |
|---|---|---|---|---|
| 47ISO40HYDH1258 | 12 mm | 58 mm | 42 mm | 35 mm |
| 47ISO40HYDH2072.5 | 20 mm | 72.5 mm | 50 mm | 46 mm |
SK50 heavy-duty hydraulic chucks (HYDH): 3 ordering codes
| Ordering code | Bore Ø (d) | Gauge Length (GPL) | C | L |
|---|---|---|---|---|
| 47ISO50HYDH1269 | 12 mm | 69 mm | 42 mm | 35 mm |
| 47ISO50HYDH2083 | 20 mm | 83 mm | 50 mm | 46 mm |
| 47ISO50HYDH3290 | 32 mm | 90 mm | 72 mm | 56 mm |
Questions about SK (ISO) heavy-duty hydraulic chucks (HYDH)
Which pull stud does an SK heavy-duty hydraulic chuck take?
The pull stud of its taper size: M12 on SK30, M16 on SK40 and M24 on SK50. Use a DIN 69872 pull stud with a 15° head.
What goes with an SK heavy-duty hydraulic chuck?
Hydro intermediate sleeves (HIS) reduce the Ø12, 20 and 32 mm bores to smaller tool shanks, Ø3–25 mm.