Makino SLIM3n

The Makino SLIM3n is a compact vertical machining center for high-volume production, built around a fixed 600 mm x 400 mm (23.6 in x 15.7 in) table with 500 mm (19.7 in) of X travel and 400 mm (15.7 in) each of Y and Z. Its HSK-A50 spindle comes in two specifications: 16,000 rpm as standard and 8,000 rpm as the alternative.

The fixed table is the choice that defines this version. Makino says it gives freedom in fixture design, a larger envelope, higher fixture weight and a simple interface for a wide range of work. The listed workpiece limit is 975 x 500 x 580 mm (38.4 in x 19.7 in x 22.8 in) and 400 kg (881 lb), larger than the table itself, so overhanging parts and tall fixtures are possible within the travels. The SLIM3n APC gives up that freedom for a 550 mm x 300 mm (21.6 in x 11.8 in) pallet that can be loaded while the other is cut.

The frame is a closed design with a pair of long supporting columns, laid out with finite element analysis for rigidity. All three axes rapid at 50,000 mm/min (1969 ipm), and the cutting feedrate runs from 1 - 20,000 mm/min (0.04 - 787 ipm). For drilling and tapping production parts, where most of the cycle is short moves between holes, the rapid rate does more for cycle time than the cutting feed ceiling.

The 26-tool ATC magazine is standard and uses an armless, direct tool pick, with an integral door that needs no separate actuators. Nozzle and flush coolant are standard, and the machine's structure slopes so chips run off quickly. A lift-up chip conveyor can be integrated at the rear for jobs that generate a lot of chips; plan for it if the parts are mostly pocketing.