Technical Description
The OKK HM1250S is a high-performance 4-axis horizontal machining center featuring substantial travels of 66.93" (X-axis), 55.12" (Y-axis), and 48.82" (Z-axis), designed for heavy-duty machining applications. It is equipped with two pallets measuring 49.21" x 49.21" each, supporting a maximum pallet load capacity of 6,600 lbs, facilitating efficient workpiece handling and increased productivity. The machine incorporates a CAT 50 spindle taper powered by a 35 to 40 hp motor, with a spindle speed of up to 8,000 rpm, and optional upgrade to 12,000 rpm, enabling versatile cutting operations across various materials.
The HM1250S is outfitted with a 60-position automatic tool changer, supporting tools up to 55 lbs in weight and 23.62" in length, with rapid tool change times optimized for reduced cycle durations. Advanced features include through-spindle coolant delivery at 1,000 psi for enhanced cutting performance and chip evacuation, rigid tapping capability, and full B-axis pallet contouring with 0.001° indexing for complex machining tasks. Precision measurement systems such as Blum laser auto tool length measurement and Renishaw touch probes facilitate accurate setup and in-process inspection. The machine’s robust construction includes heavy load capacity linear roller guides, pre-tensioned ball screws, and spindle chiller units, contributing to high rigidity and thermal stability. Rapid traverse rates reach up to 1,889 inches per minute, maximizing throughput. Weighing 72,000 lbs, the OKK HM1250S offers superior machining capability combined with durability and precision, suitable for demanding manufacturing environments.
