Roku-Roku HC-658

The Roku-Roku HC-658 is a vertical machining center arranged for dry graphite work, with travels of 23.6 x 19.6 x 15.7 in (600 x 500 x 400 mm), an HSK-E40 spindle and linear scales on all three axes. Roku-Roku's current lineup does not include it. The listed figures come as two sets of rows that disagree in places, so the rows that agree are the ones to work from and the rest need checking on the machine.

The dry-cutting equipment is the clearest part of the table. Coolant tank capacity is given as none. In its place there is an integrated graphite dust management system, with an Amano PiE-30 dust collection system listed as standard, plus spindle air purge and air blast through the spindle, both standard. Oil mist with a collector is optional, and spindle lubrication is grease packed. A shop that needs flood coolant should read those rows as a limit.

On precision, the rows that do not conflict are a spindle runout of < 1.0 µm at the spindle nose and linear scales on X, Y and Z, listed as standard at 0.00001mm. The axes are driven by linear motors.

The machine stands 113 in (2,870 mm) high on a floor space of 118 x 118 in (3000 x 3000 mm), with the table 31.5 in (800 mm) from the floor and 7.8 to 23.6 in (200 to 600 mm) between table and spindle nose. It needs 200 to 220 V at 22 kVA and 21 cu.ft./min of air at 72 psi.

Several headline rows appear twice with different values: spindle speed, spindle power, tool capacity, table size and load, rapid traverse and the accuracy figures. Read the spindle nameplate, count the tool pockets and ask for the inspection sheet before quoting any of them.