Why ABS Is Used for Functional Parts
ABS stands out from other common materials because of what you can do with it after printing. It sands cleanly, drills without cracking, and responds to acetone vapour smoothing — a process that melts the outer surface just enough to fuse layer lines together and produce a finish that closely resembles injection moulding. This makes it a practical choice for functional parts that need to look finished, not just functional.
Its impact resistance is another reason ABS remains widely used in engineering applications. Where PLA tends to snap under sudden stress, ABS deflects and absorbs the load before fracturing. Combined with its higher heat tolerance, this makes it well suited for parts that live in warm environments, sit inside electronic enclosures, or handle mechanical loads over time.
PETG filament offers a good midpoint between ease of printing and functional performance. For applications requiring strong UV resistance outdoors, ASA filament shares similar mechanical properties to ABS with the addition of weatherproofing. Your choice between these materials comes down to the specific demands of the environment the part will operate in.
Printing ABS Successfully
ABS is more sensitive to print conditions than PLA. It requires a heated bed set between 90°C and 110°C and benefits significantly from an enclosure that keeps ambient air temperature stable. Rapid temperature changes during printing cause the material to contract and lift off the bed, which is the most common failure point when printing ABS in an open-frame printer. Keeping the environment consistent around the print resolves most warping issues. For first layer adhesion, a thin coat of hairspray or a dedicated 3D printing adhesive on the bed surface works reliably for most setups.