Mechanical Principles (1930): cast, story & where to watch
1930 · Film · ★ 6.7

Released in 1930, Mechanical Principles is a notable film directed by Ralph Steiner.
What it’s about. Close up we see pistons move up and down or side to side. Pendulums sway, the small parts of machinery move. Gears drive larger wheels. Gears within gears spin. Shafts turn some mechanism that is out of sight. Screws revolve and move other gears; a bit rotates. More subtle mechanisms move other mechanical parts for unknown purposes. Weights rise and fall. The movements, underscored by sound, are rhythmic. Circles, squares, rods, and teeth are in constant and sometimes asymmetrical motion. These human-made mechanical bits seem benign and reassuring.
How it landed. With an audience score of 6.7/10, Mechanical Principles has drawn a solid, mixed-to-positive response.
Where to watch. Streaming options change often. See the full, country-by-country breakdown on our where to watch Mechanical Principles page.
Frequently asked
- Where can I watch Mechanical Principles (1930)?
- Streaming, rental and purchase options for Mechanical Principles change frequently. Check our where-to-watch page for the latest availability in your country.
- Is Mechanical Principles worth watching?
- Mechanical Principles holds an audience score of 6.7 out of 10. Reactions are mixed, so it may depend on taste.