Print-in-Place Engine Benchmark - The Bengine

Your printer, running the way it should.

87k downloads in the maker community

$8.99

Color: Gray

Printed in the USA when you order.

1.You order it
2.We print it fresh
3.It ships to you

No assembly required — prints in one piece with moving parts
Tests your printer's tolerance and precision with functional pistons
Perfect benchmark for calibrating new 3D printers or filaments
Inline engine design with cranks and cylinders that actually move
Great conversation starter and desktop display piece

The Bengine is a print-in-place engine benchmark that combines the fun of 3D printed toys with a practical printer test. This inline engine features moving pistons, connecting rods, and a crankshaft—all printed as a single piece with no assembly needed.

Designed as a benchmark tool, it challenges your printer's ability to handle tight tolerances and moving parts. The pistons glide smoothly within their cylinders right off the build plate, making it an excellent way to test new printer settings or filament types.

Print it using a 0.4mm nozzle at 0.2mm layer height with no supports required. The design relies on precise calibration, so disable any horizontal expansion compensation for best results. Once printed, you'll have a fully functional desktop engine that demonstrates both the capabilities of your printer and the possibilities of print-in-place design.