Hyundai WIA KBN135C

The Hyundai WIA KBN135C is an enhanced version of the KBN135 floor-type CNC horizontal boring machine, sharing the same 135 mm spindle diameter and core architecture but adding higher table capacity, faster tool changes, and improved rapid traverse speeds. The KBN135C is designed for shops processing heavier workpieces at higher throughput rates while maintaining the extreme torque and reach that define the KBN boring machine platform.

The three-step gear-driven spindle is identical to the KBN135, delivering 3,112/2,617 Nm of torque at 2,000 RPM from 22/18.5 kW (30/25 hp) through a BT50 taper. The same 3,000/2,000/1,600 mm (118/78.7/63 in) X/Y/Z travels and 700 mm W-axis quill extension provide the reach and flexibility for large workpiece machining. Where the KBN135C distinguishes itself is in productivity improvements: the table load capacity increases to 15,000-20,000 kg (33,069-44,092 lb), rapids improve to 10 m/min from 8 m/min, and tool change time drops dramatically to 33.2 seconds from 70 seconds.

The higher table load capacity is the most significant upgrade — at 15,000-20,000 kg, the KBN135C handles the heaviest castings and weldments encountered in power generation, shipbuilding, and heavy equipment manufacturing. The 2,000 x 1,800 mm rotary table accommodates these massive workpieces with the positioning accuracy that precision boring demands.

The faster 33.2-second tool change time approximately halves the non-productive time per tool change compared to the KBN135, which adds up significantly on complex multi-tool programs. Combined with 10 m/min rapids (25% faster than the KBN135), the KBN135C delivers measurably higher throughput on the same workpieces. At $600,000-$900,000 new, the premium over the KBN135 is justified for shops with heavier workpieces or higher production requirements.