The LR-RT-240S precision locking nut for ceramic rings (locking ring / clamping nut) is an essential mounting component used in the cutting systems of CNC laser cutters. Its main function is to securely hold the ceramic insulator in place and press it firmly against the head body. This ensures perfect centering of the cutting nozzle and eliminates the risk of any operational play that could disrupt the stability of the signal from the height sensor under the influence of high auxiliary gas pressure.

The component features a precision-cut thread, allowing for trouble-free, repeatable manual installation during routine replacement of consumable parts. The LR-RT-240S nut is a reliable, durable replacement, fully compliant with the factory specifications for Raytools Fiber cutting heads (specifically the BT240S and BM109 models), which are widely used in CNC machines from manufacturers such as Gweike, Bodor, Senfeng, HSG, and many others.