Mazak VTC-800/30SR

The Mazak VTC-800/30SR is a long-table vertical machining center with 118 in (2,997 mm) of X travel, 32 in (813 mm) of Y and 28 in (711 mm) of Z, a CAT No.40 spindle that runs to 18,000 rpm, and rapids of 1,968 ipm (50 m/min) on all three axes. Within Mazak's VTC-800/30 group it is the model that can take the optional NC rotary table.

Mazak builds the series around a B-axis swiveling head. The head swings ±110°, a 220° range, and indexes in 0.0001° increments through a zero-backlash roller gear cam and servo motor. An index coupling can clamp the head at every 5°, which Mazak describes as suitable for heavy-duty cutting. With the head alone, vertical, horizontal and slanted faces can be machined in one clamping. Simultaneous 5-axis machining needs the optional NC rotary table, which Mazak states is compatible with the VTC-800/30SR only. That table uses the same roller gear cam as the B-axis, can be mounted horizontally or vertically, and can go on either side of the machine table.

The long table is the other half of the design. Mazak's table gives a maximum workpiece size of 138 in (3,505 mm) × 32.3 in (820 mm), the same dimensions as the 137.8″ × 32.28″ long table described for the series. A removable center partition is an option: it divides the machining area so one side can be loaded while the other is cutting, and Mazak notes that an NC rotary table can be mounted on each side.

The spindle is rated 35 kW (47 HP) (30 min. rating). Mazak describes it as able to cut aluminum, cast iron and steel, but the table publishes no torque figure and no continuous rating, so sustained heavy cuts should be planned from the output chart. The magazine holds 30 tools, which is modest for 5-axis work on parts this long. The VTC-300C, by comparison, has 1670 mm of X travel, 760 mm of Y, 660 mm of Z and 24 tools.