GS Tooling 531414 CAT40 4.00 ER20 Collet Chuck

• Collet System : ER • Collet Series: ER20 • Shank Type: Taper Shank • Taper Size: CAT40 • Projection (Decimal Inch): 4 • DIN Coolant option - standard • All Ground Body • Factory Balanced to save spindle life tool life and increased productivity • Threaded through holes for a back-up screw (tool stop) or coolant through when removed • Wrench not included • Premium balanced to G2.5 @ 30 000 rpm