Machinable PTFE-based shapes

Quadrant Engineering Plastic Products (Reading, Pa.) has its Fluorosint range of rod, tube and sheet materials, from which highly wear-resistant, low-friction sealing rings and bearings can be machined, with the introduction of its Fluorosint HPV grade. The products, which chemically link mica with PTFE, reportedly

Quadrant Engineering Plastic Products (Reading, Pa.) has its Fluorosint range of rod, tube and sheet materials, from which highly wear-resistant, low-friction sealing rings and bearings can be machined, with the introduction of its Fluorosint HPV grade. The products, which chemically link mica with PTFE, reportedly have a dynamic coefficient of friction (dry vs. steel) of 0.14 to 0.15, a K-factor (an indicator of wear resistance) of 25,000, Rockwell hardness of R54 and service temperature range of -240°C to 260°C (-400°F to 500°F), offering performance greater than parts made from unfilled PTFE. Machined parts can be used with or without external lubrication, reportedly allowing them to wear evenly without erratic motion in low-speed start/stop applications that require zero stick-slip. Finished parts (material can be supplied in near-net shape) exhibit wear behavior superior to bronze, powdered metals and steel, will neither rust nor corrode in alkaline or acidic environments and are FDA-compliant for food processing equipment.