Round Rod in PEEK CF30 3000 mm black

Round rod in PEEK CF30 is blank material for turned and milled parts that have to take high temperatures and high mechanical load. The carbon fiber at 30 percent gives stiffness and dimensional stability that unfilled PEEK does not reach, and the material handles 260 degrees continuously with short peaks toward 300 degrees.

The mechanical profile is heavy: tensile strength around 112 MPa according to ISO 527, ball indentation hardness 298 MPa and impact strength of 92 kJ per square meter. Thermal conductivity sits at around 0.66 W/mK, which is unusually high for a plastic and a concrete advantage in plain bearings where the frictional heat otherwise gathers in the surface and accelerates wear. Water absorption is 0.03 percent. The dimensional change with moisture is negligible, which is the whole reason to pick a CF grade in precision work.

Chemically the material handles fuels, hydraulic fluids, process chemicals and most solvents. Sterilization with steam, autoclave or gamma radiation does not harm the polymer. Fire rating V0 according to UL 94 opens the door to rail traffic, aviation and offshore.

The round rod is a classic blank for bushings, plain bearings, gears, valve stems, pump impellers and precision parts in semiconductor or medical technology production. It is also used for smaller runs of milled parts where the sheet would have given too much waste. The carbon fiber makes the material slightly electrically conductive, which is enough as ESD protection in applications close to electronics. If full electrical insulation is required, glass filled PEEK is the better choice.

For machining, sharp carbide tools, high cutting speed and conservative feed apply. The carbon fiber wears on the cutting edge, so count on more frequent changes in series production. Chip clearance has to be good, because fine carbon fiber dust is unpleasant to breathe in. Drilling, turning and milling work well with plenty of cooling, even though PEEK in itself takes dry machining. Mechanical fasteners are the first choice for joining, but epoxy adhesive after surface activation holds.

PEEK CF30 is justified when no cheaper material meets the requirements. If the choice stands between CF30 and GF30, CF30 is the choice for maximum stiffness and thermal dissipation, GF30 for electrical insulation and somewhat lower cost. We are glad to help with the material choice if the requirements are unclear.

The round rod is delivered in standard diameters and cut to the length you want in our cutting department. State diameter and length and we will come back quickly with what is in stock.