SK50 ER collet chucks
SK50 (ISO 50) ER25 Collet Chucks (DIN 69871): Gauge Lengths 80, 100, 150, 200, 250, 260 and 300 mm
SK50 (ISO 50) ER25 collet chucks hold round-shank drills, reamers and end mills in a DIN 6499 ER25 collet, closed by the ER25 clamping nut (M18x1.5). PTP makes them with an SK shank (DIN 69871 / ISO 7388-1) in gauge lengths of 80, 100, 150, 200, 250, 260 and 300 mm, for tool shanks of 1–16 mm. Ordering codes: 7. SK50 holders are pulled into the spindle by an M24 DIN 69872 pull stud. Taper AT3 or better, TIR 0.005 mm max, balanced G2.5 @ 25,000 rpm.
SK50 (ISO 50) ER25 collet chucks: 7 ordering codes
Every ordering code opens its own page with the drawing and every dimension (mm).
| Ordering code | Clamping Range | Nut Ø (d) | Gauge Length (GPL) | GPL Long |
|---|---|---|---|---|
| 47ISO50ER2580 | 1–16 mm | 42 mm | 80 mm | 160 mm |
| 47ISO50ER25100 | 1–16 mm | 42 mm | 100 mm | – |
| 47ISO50ER25150 | 1–16 mm | 42 mm | 150 mm | – |
| 47ISO50ER25200 | 1–16 mm | 42 mm | 200 mm | – |
| 47ISO50ADER25250 | 1–16 mm | 42 mm | 250 mm | – |
| 47ISO50ADER25260 | 1–16 mm | 42 mm | 260 mm | – |
| 47ISO50ADER25300 | 1–16 mm | 42 mm | 300 mm | – |
SK50 ER25 collet chuck
PTP catalogue drawing, dimensions in mm
Questions about SK50 ER25 collet chucks
What is the clamping range of an SK50 ER25 collet chuck?
1–16 mm. ER25 collets to DIN 6499 clamp tool shanks from 1 to 16 mm, one collet for each size step.
Which pull stud does an SK50 ER25 collet chuck need?
An M24 SK50 pull stud: DIN 69872 with a 15° head.
Which nut and collets fit an SK50 ER25 collet chuck?
ER25 collets to DIN 6499 and the ER25 clamping nut: slotted 36CCNER25. For coolant-through tools, an ER25 sealing ring (11 sizes, 36CCNER25SR060 to 36CCNER25SR160).