The next-generation Y-axis, sub-spindle 10-in chuck Doosan Puma 2600SY Mk II box guideway turning center series is now available. This series replaces the Puma 2600SY (Mark 1) and features a whole host of technology improvements and enhancements – all designed to make the machines more accurate, more productive and more reliable.
The new machines are equipped with a 10-in chuck but, unlike Puma 2600SY Mark 1 models, have a larger (81mm) bar diameter capacity, increasing their versatility. They are also supplied with built-in type spindles (as opposed to belt-driven spindles), which generate less vibration during cutting operations and, as a consequence, deliver improved part accuracies and process reliability, in addition to reduced tool wear.
And ensuring accuracy are a number of technology innovations:
• Six strategically positioned heat sensors that automatically monitor and compensate for any thermal displacement occurring during machining operations. Effects of thermal displacement have been reduced by up to 70%, compared to Mk I models.
• The built-in type spindles provided as standard on the new Puma 2600SY Mk II machines feature a reconfigured spindle bearing structure comprising 2x angular contact bearings and 2x taper roller bearings. The new structure improves C-axis positional accuracy and spindle run out (less than 6 micron) and the addition of taper roller bearings enable high accuracy, heavy duty machining.
• High performance NTN material (as opposed to Turcite) on its box guideway axes resulting in improved and more responsive axes’ movement and reduced axes wear.
Other performance improvements on the new Puma 2600SY Mk II include an improved milling turret design that incorporates a curvic coupling piston structure that delivers up to 12% more clamping force, improved durability of the machine’s Y-axis carriageway and a spindle air-purge function that helps prevent chip and coolant ingress.
Finally, the machines’ improved EOP (Easy Operation Package) functionality now includes crash avoidance capability and the OPRT machine status condition display screens ensure that the new machines are amongst the most accurate and reliable 10-in chuck lathes on the market.
For further details contact Puma Machine Tools on TEL: 011 976 8600 or visit www.pumamachinetools.co.za