CNC Turning Center JS-108A

The JS-108A is a medium-sized cnc turning center built on the JS-108 platform, upgraded with a power turret so that milling and drilling can be done in the same set-up as turning. It keeps the same integrated 30-degree slant bed base, HT300 resin sand castings with double aging treatment, and hand-scraped casting mating surfaces that give the JS series its rigidity. The X/Z axis ball screws are pre-stretched, holding 0.01 mm positioning accuracy and +/-0.003 mm repeat positioning accuracy. An 11/15 kW servo spindle reaches 4200 rpm through an A2-6 head, while a 12-station servo power turret indexes at X/Z rapid traverse of 24/30 m/min. The machine swings Phi550 mm over the bed, turns discs up to Phi250 mm, and reaches 400 mm in length, with a Phi66 mm spindle through hole. An 8-inch hydraulic 3-jaw chuck with a matching hollow rotary cylinder holds the part, and the hydraulic programmed tailstock carries a Phi90 mm sleeve with MT5 taper. By integrating turning, milling and drilling into one clamping, it reduces both clamping error and workpiece turnover time, and it is certified to the ISO9001 quality management system. For shops that currently move a part from a lathe to a separate mill, the JS-108A consolidates that routing onto one machine.

Because the JS-108A combines turning with driven-tooling operations, its cycle and fixture layout are often specific to a customer's part. KingKAI's independent R&D team takes the customer's drawing, evaluates the process route, and turns a complex multi-operation part into a single-program machine, lowering the development risk that normally comes with first-time turn-mill work. The team also defines which operations move from a separate mill or drill press onto the machine, so the customer can phase the process migration without disrupting an existing line.

The power turret drills and taps cross holes in the same clamping as turning, eliminating the second set-up that a separate drill press would require.

The driven tools mill the flange face and drill the bolt circle in one cycle, so the bolt pattern stays concentric with the turned bore.

Off-center milling on a turned shaft removes the separate milling operation, and the rigid slant bed holds alignment across both processes.