SK (ISO) tool holders
SK (ISO) ER Collet Chucks – SK30, SK40 and SK50 (DIN 69871)
An ER collet chuck holds round-shank cutting tools in a DIN 6499 ER collet, closed by an ER clamping nut, for drilling, reaming and milling. PTP makes them with an SK (ISO) shank (DIN 69871 / ISO 7388-1) in SK30, SK40 and SK50: ER16 to ER50 collets, gauge lengths 60–300 mm, 59 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, TIR 0.005 mm max, balanced G2.5 @ 25,000 rpm.
ER Collet Chucks, SK (ISO) shank
PTP catalogue drawing, dimensions in mm
All 59 SK (ISO) ER collet chucks
One table per taper size. Every ordering code opens its own page with its dimensions (mm).
SK30 ER collet chucks: 10 ordering codes
| Ordering code | Collet | Clamping Range | Nut Ø (d) | Gauge Length (GPL) | GPL Long |
|---|---|---|---|---|---|
| 47ISO30ER1660 | ER16 | 1–10 mm | 28 mm | 60 mm | – |
| 47ISO30ER16100 | ER16 | 1–10 mm | 28 mm | 100 mm | – |
| 47ISO30ER2060 | ER20 | 1–13 mm | 32 mm | 60 mm | – |
| 47ISO30ER20100 | ER20 | 1–13 mm | 32 mm | 100 mm | 120 mm |
| 47ISO30ER2560 | ER25 | 1–16 mm | 42 mm | 60 mm | – |
| 47ISO30ER25100 | ER25 | 1–16 mm | 42 mm | 100 mm | – |
| 47ISO30ER3260 | ER32 | 2–20 mm | 50 mm | 60 mm | – |
| 47ISO30ER32100 | ER32 | 2–20 mm | 50 mm | 100 mm | – |
| 47ISO30ER20150 | ER20 | 1–13 mm | 34 mm | 150 mm | – |
| 47ISO30ER25150 | ER25 | 1–16 mm | 42 mm | 150 mm | – |
SK40 ER collet chucks: 22 ordering codes
| Ordering code | Collet | Clamping Range | Nut Ø (d) | Gauge Length (GPL) | GPL Long |
|---|---|---|---|---|---|
| 47ISO40ER1670 | ER16 | 1–10 mm | 28 mm | 70 mm | – |
| 47ISO40ER16100 | ER16 | 1–10 mm | 28 mm | 100 mm | – |
| 47ISO40ER2070 | ER20 | 1–13 mm | 34 mm | 70 mm | – |
| 47ISO40ER20100 | ER20 | 1–13 mm | 34 mm | 100 mm | – |
| 47ISO40ER2570 | ER25 | 1–16 mm | 42 mm | 70 mm | 150 mm |
| 47ISO40ER25100 | ER25 | 1–16 mm | 42 mm | 100 mm | – |
| 47ISO40ER3270 | ER32 | 2–20 mm | 50 mm | 70 mm | 200 mm |
| 47ISO40ER32100 | ER32 | 2–20 mm | 50 mm | 100 mm | – |
| 47ISO40ER4080 | ER40 | 3–26 mm | 63 mm | 80 mm | – |
| 47ISO40ER40100 | ER40 | 3–26 mm | 63 mm | 100 mm | – |
| 47ISO40ER50100 | ER50 | 10–34 mm | 78 mm | 100 mm | – |
| 47ISO40ER50160 | ER50 | 10–34 mm | 78 mm | 160 mm | 250 mm |
| 47ISO40ER16200 | ER16 | 1–10 mm | 28 mm | 200 mm | – |
| 47ISO40ER20150 | ER20 | 1–13 mm | 34 mm | 150 mm | – |
| 47ISO40ER20200 | ER20 | 1–13 mm | 34 mm | 200 mm | – |
| 47ISO40ER25150 | ER25 | 1–16 mm | 42 mm | 150 mm | – |
| 47ISO40ER25200 | ER25 | 1–16 mm | 42 mm | 200 mm | – |
| 47ISO40ADER16150 | ER16 | 1–10 mm | 28 mm | 150 mm | – |
| 47ISO40ADER32150 | ER32 | 2–20 mm | 50 mm | 150 mm | – |
| 47ISO40ADER32250 | ER32 | 2–20 mm | 50 mm | 250 mm | – |
| 47ISO40ADER40150 | ER40 | 3–26 mm | 63 mm | 150 mm | – |
| 47ISO40ADER40200 | ER40 | 3–26 mm | 63 mm | 200 mm | – |
SK50 ER collet chucks: 27 ordering codes
| Ordering code | Collet | Clamping Range | Nut Ø (d) | Gauge Length (GPL) | GPL Long |
|---|---|---|---|---|---|
| 47ISO50ER1680 | ER16 | 1–10 mm | 28 mm | 80 mm | – |
| 47ISO50ER16100 | ER16 | 1–10 mm | 28 mm | 100 mm | – |
| 47ISO50ER2080 | ER20 | 1–13 mm | 34 mm | 80 mm | – |
| 47ISO50ER20100 | ER20 | 1–13 mm | 34 mm | 100 mm | – |
| 47ISO50ER2580 | ER25 | 1–16 mm | 42 mm | 80 mm | 160 mm |
| 47ISO50ER25100 | ER25 | 1–16 mm | 42 mm | 100 mm | – |
| 47ISO50ER3280 | ER32 | 2–20 mm | 50 mm | 80 mm | 200 mm |
| 47ISO50ER32100 | ER32 | 2–20 mm | 50 mm | 100 mm | – |
| 47ISO50ER4080 | ER40 | 3–26 mm | 63 mm | 80 mm | – |
| 47ISO50ER40100 | ER40 | 3–26 mm | 63 mm | 100 mm | – |
| 47ISO50ER50100 | ER50 | 10–34 mm | 78 mm | 100 mm | – |
| 47ISO50ER50160 | ER50 | 10–34 mm | 78 mm | 160 mm | – |
| 47ISO50ER16200 | ER16 | 1–10 mm | 28 mm | 200 mm | – |
| 47ISO50ER20150 | ER20 | 1–13 mm | 34 mm | 150 mm | – |
| 47ISO50ER20200 | ER20 | 1–13 mm | 34 mm | 200 mm | – |
| 47ISO50ER25150 | ER25 | 1–16 mm | 42 mm | 150 mm | – |
| 47ISO50ER25200 | ER25 | 1–16 mm | 42 mm | 200 mm | – |
| 47ISO50ER32150 | ER32 | 2–20 mm | 48 mm | 150 mm | – |
| 47ISO50ER32200 | ER32 | 2–20 mm | 48 mm | 200 mm | – |
| 47ISO50ADER16150 | ER16 | 1–10 mm | 28 mm | 150 mm | – |
| 47ISO50ADER16250 | ER16 | 1–10 mm | 28 mm | 250 mm | – |
| 47ISO50ADER25250 | ER25 | 1–16 mm | 42 mm | 250 mm | – |
| 47ISO50ADER25260 | ER25 | 1–16 mm | 42 mm | 260 mm | – |
| 47ISO50ADER25300 | ER25 | 1–16 mm | 42 mm | 300 mm | – |
| 47ISO50ADER32200 | ER32 | 2–20 mm | 48 mm | 200 mm | – |
| 47ISO50ADER32250 | ER32 | 2–20 mm | 48 mm | 250 mm | – |
| 47ISO50ADER32300 | ER32 | 2–20 mm | 48 mm | 300 mm | – |
Questions about SK (ISO) ER collet chucks
Which pull stud does an SK ER collet 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 ER collet chuck?
DIN 6499 ER collets (ER16, ER20, ER25, ER32, ER40 and ER50), the ER clamping nut of that size (slotted 36CCNER16, 36CCNER20, 36CCNER25, 36CCNER32, 36CCNER40 and 36CCNER50; hex ER-A 36CCNER16A and 36CCNER20A) and, for coolant-through tools, an ER sealing ring (ER16, ER20, ER25, ER32 and ER40).
ER collets DIN 6499 Slotted ER collet nuts Hex ER collet nuts ER sealing rings ER collet size chart