Print tough, long-lasting parts that won’t scratch or wear out from constant motion and friction, such as gears and washers. You can even tap or drill the parts without them cracking or shattering.

Use these filaments with fused filament fabrication (FFF) printers. Because of their relatively high melting point, a heated printer bed is recommended. These filaments also emit fumes when printing, so it’s best to use them in an enclosed printer or to remove the fumes with a fume exhauster. Store them in a sealed container with a desiccant so they don’t absorb moisture in the air, which can make them unusable.

Nylon 6/66 filaments are the strongest nylon filaments without a filler, but may warp while cooling.

Nylon 6/6 filaments grip printing surfaces more firmly and shrink less than other nylons, making them easier to print. Use them to form semi-flexible components and medium-stress parts.

Nylon 6/69 filaments stand up to chemicals for use in a variety of chemical processing applications. They’re also FDA Compliant 21 CFR 177.1395 and FDA Compliant 21 CFR 177.1500, so they can be used to produce parts that are intended for processing, handling, and packaging food and beverages.

Nylon 680 filaments are rated FDA Compliant 21 CFR 177.1395 and FDA Compliant 21 CFR 177.1500, so they can be used to produce parts that are intended for processing, handling, and packaging food and beverages. They also withstand ethylene oxide and steam sterilization processes, making them good for sterile environments.

Carbon-fiber-filled nylon filaments make rigid parts that are difficult to bend and break. Their parts can also be threaded and machined more easily than the same filaments without any filler. However, they’re abrasive, so only use them with abrasion-resistant nozzles.

Fiberglass-filled nylon filaments make strong parts that are less prone to warping or shrinking than the same filaments without any filler. However, they’re abrasive, so only use them with abrasion-resistant nozzles.

Tensile strength is the best measure of a filament's overall strength. Similar to the stress applied on a rope during a game of tug-of-war, it's the amount of pulling force a material can handle before breaking. A higher rating means a stronger filament. A tensile strength of 5,000 psi and above is considered good; 12,000 psi and above is excellent.

Maximum exposure temperature is the point at which a printed part will begin to deform. Above this temperature, your printed parts will start to lose structural integrity.