Haas VF-2

The Haas VF-2 is a 40-taper vertical machining center, and the size most general job shops settle on. Travels are 762 × 406 × 508 mm (30.00 × 16.00 × 20.00 in), with the spindle nose working between 102 mm and 610 mm (4.0 to 24.0 in) above the table. The table itself is 914 × 356 mm (36.0 × 14.0 in) with three T-slots on 125 mm (4.92 in) centres and a 1,361 kg (3,000 lb) load limit. The narrow table relative to the X travel is the practical planning constraint: the full 762 mm of X is there, but with only 356 mm of table width, multi-part setups run in a row rather than a grid.

The inline direct-drive spindle is rated 22.4 kW (30.0 hp) to 8,100 rpm and produces 122.0 Nm (90.0 ft-lbf) at 2,000 rpm. With the gearbox that becomes 339 Nm (250 ft-lbf) at 450 rpm, which changes the machine's character: the base spindle handles aluminium and light steel comfortably, while the gearbox is what makes sustained roughing in tougher alloys realistic. Taper is available as CT40, BT40 or HSK-A63; the spindle is liquid cooled with air/oil injection bearing lubrication.

Rapids are 25.4 m/min (1,000 ipm) on all three axes with a maximum cutting feedrate of 16.5 m/min (650 ipm). Axis thrust is 11,343 N (2,550 lbf) on X and Y and 18,683 N (4,200 lbf) on Z — the extra Z thrust is what carries drilling loads. The 20-pocket carousel changer runs 4.20 s tool-to-tool and 4.50 s chip-to-chip, taking tools up to 89 mm (3.5 in) diameter and 5.4 kg (12.0 lb). A carousel is slower than an arm changer, and on tool-heavy programs those seconds accumulate; on typical job shop work with long cuts between changes, they rarely show up.

The machine weighs 3,539 kg (7,800 lb) and holds 208 L (55 gal) of coolant. It runs on 220 VAC three-phase at 70 A or 440 VAC three-phase at 35 A, and needs 113.0 L/min at 6.9 bar (4 scfm at 100 psi) with a 5.5 bar (80 psi) minimum. Those service figures deserve attention before delivery — in small shops the compressor, not the electrical supply, is usually the constraint that bites first.