BT40 ER collet chucks
BT40 ER20 Collet Chucks (MAS 403): Gauge Lengths 70, 100, 150 and 200 mm
BT40 ER20 collet chucks hold round-shank drills, reamers and end mills in a DIN 6499 ER20 collet, closed by the ER20 clamping nut (M12x1.5). PTP makes them with a BT shank (MAS 403 / JIS B6339, ISO 7388-2 type J) in gauge lengths of 70, 100, 150 and 200 mm, for tool shanks of 1–13 mm. Ordering codes: 4. BT40 holders are pulled into the spindle by an M16 MAS-BT or JIS B6339 pull stud. Taper AT3 or better, TIR 0.005 mm max, balanced G2.5 @ 25,000 rpm.
BT40 ER20 collet chucks: 4 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) |
|---|---|---|---|
| 47BT40ER2070 | 1–13 mm | 34 mm | 70 mm |
| 47BT40ER20100 | 1–13 mm | 34 mm | 100 mm |
| 47BT40ER20150 | 1–13 mm | 34 mm | 150 mm |
| 47BT40ER20200 | 1–13 mm | 34 mm | 200 mm |
BT40 ER20 collet chuck
PTP catalogue drawing, dimensions in mm
Questions about BT40 ER20 collet chucks
What is the clamping range of a BT40 ER20 collet chuck?
1–13 mm. ER20 collets to DIN 6499 clamp tool shanks from 1 to 13 mm, one collet for each size step.
Which pull stud does a BT40 ER20 collet chuck need?
An M16 BT40 pull stud: MAS-BT with the head angle your drawbar takes (45°, 60° or 90°), or JIS B6339 with a 15° head.
Which nut and collets fit a BT40 ER20 collet chuck?
ER20 collets to DIN 6499 and the ER20 clamping nut: slotted 36CCNER20 or hex 36CCNER20A. For coolant-through tools, an ER20 sealing ring (8 sizes, 36CCNER20SR060 to 36CCNER20SR130).
ER collets DIN 6499 Slotted ER collet nuts Hex ER collet nuts ER sealing rings