we offer all kinds of BT ER Collet chuck
include (BT30 ,40,50 and ER11 ,ER16 ,ER20
ER25 ,ER32,ER40 and ER50 )
The protrustion length are difference from 20mm t0 200mm .
Offer balance by G2.5 and without future balance
Preicison : from 0.003 to 0.015
Holder hardend : 48-55 HRC
we offer custom collet chuck services
Bulk of kinds model in stock and fast delivery  .

Model  BT30-ER11-100
L1  100
L  148.4
d1 19
Thread  M12X1.75
Order No YS0812