A split frame lathe, otherwise known as "clamshells" because it can open up in half to reassemble around a pipe, is a tool that produces revolutionary cutting or beveling of in-line tube and pipe.  A split frame lathe with internalized protruding components, such as the TRIMAX, is an engineering control that reduces worker injuries and amputations from getting caught in pinch points normally produced by conventional split frame lathe designs where the tool modules revolve around stationary protruding components.

The TRIMAX system uses recirculating ball bearing technology to render the system rigid both axially and radially, providing the strength needed for fast, safe form tooling on heavy wall pipe.  Per the manufacturer, "the vastly improved rigidity of the TRIMAX system also opens the doors to new... possibilities of special applications never before achieved with a split-ring machining system.  The capacity to accept much larger cutting loads and forces without adversely affecting performance maximizes the special accessory configuration extensibility of this machining system."  The system models and pipe size capacity are as follows:

It is recommended users follow all manufacturer guidelines before using this equipment to ensure worker safety and compliance with applicable local, state or federal regulations.

Besides reducing the caught-in or -between hazard, another safety feature of the TRIMAX is an “Auto Lock” system that locks the head stock in place whenever the frame is separated. This eliminates the need for the operators to manually install locking pins to keep the head stock from rolling out onto their foot or onto other personnel that may be working bellow.

Le, Jean Christophe, MPH - CPWR The Center for Construction Research and Training

This solution page was adapted from a direct correspondence with the inventor Joel Walton.