Recent Blogs
Crank to Oscillating Rod Reciprocating Mechanism: How It Works, Diagram, Formula & Uses
Explore a crank-driven oscillating rod. Calculate output angular range, one-way tip arc, minimum transmission angle and full-turn closure from four link lengths.
Hoeken Straight-Line Example: Animation and Path Calculator | FIRGELLI
Scale a defined Hoeken four-bar and compare travel, sampled deviation and crank period. See the approximately straight working interval and curved return.
Rod End Bearing Mechanism: How It Works, Parts, Diagram, and Linkage Uses Explained
Rod End Bearings (Heim joints) handle misalignment in linkages — see how they work, load ratings, failure modes, and selection rules for motorsport and CNC...
Origami Vertex Angle Calculator: Kawasaki Condition | FIRGELLI
Check four sector angles at one origami vertex. See alternating angle sums, total angle and deviation from Kawasaki’s local flat-foldability condition.
Bell-crank Lever (changing Direction of Force): Mechanism, Diagram, Animation & Calculator Explained
Bell-crank lever explained: how this 90° force-redirecting linkage works, with formulas, worked examples, and real uses in aircraft controls and machinery.
Variable-radius Lever: Ideal Arm-length Calculator
Interpolate an assumed mechanical-advantage ratio and divide a total lever span into effort and resistance arms. Actual fulcrum motion and force capacity are not calculated.
Toggle-joint Cam Movement: Ideal Symmetric-link Force Calculator
Explore a cam acting on a toggle knee. Compare ideal symmetric-link reactions and knee offset, with an entered scaling factor separate from real losses.
Slider-crank Reversing Mechanism: How It Works, Diagram, Parts, Formula and Uses Explained
Slider-crank reversing converts continuous rotation into reciprocating linear motion. See how it works, formula, worked example, and shaper-machine uses.
Doubling the Length of a Crank Stroke: How the Rack-and-Pinion Mechanism Works
Explore a crank-driven rack stroke doubler. Set crank radius, rod length and pinion size to calculate output stroke, live speed and sampled peak speed.