NTC X-Axis Ball Screw NSK Dual/Split Nut
This image shows what the X-Axis service of the NTC Lasers entails. The THK Screw is a split nut type that moves the table back and forth by a belt driven fixed ball screw shaft. The ball screw drive pulley is connected to a heavy motor mounted underneath. This is a rather complicated assembly to get apart and rebuild. As not only is this refurbishment done on the floor, it is dirty and uncomfortable. If your X-Axis requires belt replacement, or an reserve extra installed to reduce future failure downtime, it requires a few hours of extra surgery and reassembly to be done properly. One of the addition drawbacks of this system, is that it has a rotation bearing gets most of the lubrication, with a passive amount finally reaching the interior ball nut. It is this reason why Ballscrew Guys suggests regular inspection and service of the X-Axis lube delivery system.