ER11:刀杆直径16mm,螺母外径19mm,不含螺母长度35mm,含螺母总长:40mm,夹持范围1-8mm ER16:刀杆直径20mm,螺母外径24mm,不含螺母长度35mm,含螺母总长:45mm,夹持范围1-12mm ER20:刀杆直径25mm,螺母外径34mm,不含螺母长度50mm,含螺母总长:60mm,夹持范围1-16mm 材质:40crmnti 高精款本体精度:<0.005mm, ...