New JOHNFORD ST-40BH | CNC Turning Center

Description

The Johnford ST-40BH is a heavy duty, high precision CNC turning center cast from Meehanite iron. Full advantage of the 35HP (50HP opt.) spindle motor and 4 speed gear box is taken by the one piece, 60 degree slant bed design. Built in classic style, the 60 degree slant bed is a torque tube design. The torque tube, or hole cast through the center of the slant bed, provides an extremely rigid bed and excellent heat dissipation. The square box ways provide the rigidity for heavy duty turning. Hand scraped Turcite - B applied to all mating sliding surfaces ensures high rapid traverse rates and accurate positioning. To ensure precision and thermal stability the headstock, tailstock, and saddle are all mounted on the same plane at a 60 degree angle. The coolant tank is separate from the machine base to prevent heat transfer from the coolant to the machine casting which ensures precision and promotes easy clean out and maintenance. To further ensure accuracy and precision, the ballscrews are double nut type and pretensioned to eliminate thermal growth.

The precision spindle structure is mounted using precision double row roller bearings in conjunction with angular contact ball bearings for high rigidity and accuracy. The spindle quill inner and outer linings are precision ground for fit with the spindle, thus ensuring extreme concentricity and accuracy. The spindle is driven by a 35HP high torque motor which provides plenty of power. For applications requiring high torque at low RPM’s, a four speed gear box is standard. A 50HP spindle motor is an option for heavy duty machining on large diameters.

A 12 station bi-directional turret or optional BMT live turret provides .5 second indexing as well as coolant through the tool holders. A full Cf axis with live tools is available for applications requiring milling operations. In addition, a true linear Y axis is optionally available with +/- 4” of travel for 3 axis milling ability. The true linear Y axis provides turret movement perpendicular to the X axis for complex off-center milling functions. Perpendicular axes also simplify machine alignment in the event of an accident. Your choice of Fanuc controllers are available to suit any need and provide the latest control technology and the world’s best reliability.