BT Collet Chucks
BT30, BT35 and BT40 collet chucks for CNC routers: 38 ER collet chucks from ER16 to ER40, and 2 SYOZ25 holders. They are balanced to 25,000 RPM at G2.5, with 0.0001" runout (T.I.R.) measured from taper to collet pocket, and come with a PowerCOAT nut. Each holder is lab certified for accuracy and balance and comes with its report.
| Taper | Collet | Gauge lengths | Notes |
|---|---|---|---|
| BT30 | ER16 | 60 to 120 mm | hex nut |
| BT30 | ER20 | 63.5 to 135 mm | hex nut; 70 mm also without slots |
| BT30 | ER25 | 60 to 135 mm | slotted nut |
| BT30 | ER32 | 60 to 100 mm | slotted nut; 60 and 90 mm Komo versions without slots |
| BT30 | ER40 | 80 mm | slotted nut |
| BT30 | SYOZ25 | 70 mm | with nut; also with 38 mm flats |
| BT35 | ER32 | 76 mm | for Heian routers |
| BT40 | ER16 | 70 to 180 mm | hex nut |
| BT40 | ER20 | 70 to 150 mm | hex nut |
| BT40 | ER25 | 70 to 150 mm | slotted nut |
| BT40 | ER32 | 70 to 150 mm | slotted nut |
| BT40 | ER40 | 80 to 150 mm | slotted nut |
Largest tool shank by collet size: ER16 .406", ER20 .512", ER25 .630", ER32 .788", ER40 1.023".
Collets: ER collets by size and SYOZ & EOC Collets. BT30 and BT40 shrink fit holders: BT Shrink Fit Holders. Retention knobs (pull studs): Retention Knobs & Tool Forks.
Brand names are trademarks of their owners, used here only to show compatibility.