High Performance Milling Chuck BT 40-20-90 JIS B 6339 (MAS-BT) HKS-system in wooden boxApplication: For mounting straight shank tools. All holders are made of forged steel Specific, low warpage hardened Surface hardened HRC 58~60 Hardening depth 0,8mm~0,9mm Taper angle tolerance < AT 3 according to DIN 2080 Surface roughness Ra < 0,4 m Tensile strength in the core of min. 800 N mm after DIN All functional surfaces fine machined

For sealing tools with internal cooling

For highest axial and radial loading

For internal machining with boring bars

For mounting straight-shank tools in collets

800 N/mm² after DIN

Only nominal size d can be clamped with sealing plug for internal cooling (applicable up to 21 bar) In order to achieve an optimum sealing the tool must be clamped on the complete length of the ground drill of the collet

For face machining

For mounting tools with straight shanks

- Higher repeat-accuracy

chip breaking

LSCX = Clamping depth

With clamping screw and axial adjustment bolt