Hardinge Kellenberger K1000

The Hardinge Kellenberger K1000 is the largest and most capable model in the K-series cylindrical grinding platform, designed for heavy-duty precision grinding of large shafts, rollers, and cylindrical components. With center distance options of 1,000 mm and 1,600 mm, center heights of 200, 250, or 300 mm, and workpiece capacity up to 600 mm diameter and 300 kg weight, the K1000 handles industrial-scale workpieces that exceed the capacity of the K10 and K100.

The external grinding spindle delivers 10 kW through a water-cooled motor, driving grinding wheels in three size options: 300 x 40 mm, 400 x 63 mm, or 500 x 120 mm at peripheral speeds up to 63 m/s for CBN superabrasive grinding. The high-frequency internal grinding spindle reaches speeds up to 90,000 RPM with up to 15 kW power, enabling precision bore grinding on large-diameter workpieces. The B-axis provides 240-degree swivel range at 30 RPM for compound-angle grinding setups.

Axis travels include up to 1,670 mm on Z and 365 mm on X, with feed rates of 20,000 mm/min and 10,000 mm/min respectively. Scale resolution of 0.00001 mm on both axes and 0.00001-degree B-axis encoder resolution deliver sub-micron positioning. Roundness accuracy reaches 0.4 microns standard and 0.2 microns with fly grinding techniques, matching the K100's precision specifications on significantly larger workpieces.

The K1000 runs on a Fanuc 31i-B CNC control with a 19-inch touchscreen and Kellenberger's BLUE Solution grinding software. Machine weight ranges from 5,700 to 6,700 kg depending on center distance. The footprint spans 3.7 x 2.2 m to 4.8 x 2.2 m. New K1000 machines price between $450,000 and $700,000. The machine competes with the Studer S41, Junker Jumat 6000, and Toyoda GL6Ai-200 in the large-format precision cylindrical grinder segment. Specs sourced from Kellenberger published data.