Recent Blogs
Sarrus Linkage Mechanism: How It Works, Parts, Formula, Diagram and Uses Explained
Sarrus Linkage explained — the spatial straight-line mechanism behind deployable solar arrays, scissor lifts, and folding optics. With formula and worked example.
Prismatic Pair: Declared Sliding-Friction Ledger
Prismatic Pair explained — the sliding lower-element joint behind every Linear Actuator, machine slide and hydraulic cylinder. Specs, formulas, real builds.
Reversing Grooved Drum: Helix Lead Calculator | FIRGELLI
Calculate axial advance from groove diameter and lead angle. Explore constant-lead geometry, slope and the distinction between helix advance and a complete reversing stroke.
Grooved Barrel Cam: Reciprocating Timing Calculator | FIRGELLI
Convert rise, dwell and return angles into milliseconds at a selected cam rpm. Check the 360-degree angle sum and explore a schematic barrel-cam cycle.
Cylindrical Cam Mechanism Explained: How a Drum Cam Works, Parts, Formula and Uses
Explore a closed barrel-cam groove with cycloidal rise and return. Calculate selected follower travel, signed axial velocity, groove slope and rise time.
Reciprocating-rack Crank Substitute Mechanism Explained: How It Works, Parts, Formula and Uses
Explore Brown movement 119 with an endless rack and guided pinion. Calculate cycle time and mean rack speed from stroke and full-cycle rate.
Scott Russell Linkage Mechanism Explained: Diagram, Formula, Stroke and Uses
Scott Russell linkage explained — how this straight-line mechanism converts rotary motion into perfectly linear travel for test rigs, lifts, and lab equipment.
Reciprocating Motion: Whitworth-type Quick-return Timing Comparison
Compare assumed working and return crank sweeps at constant input speed. The diagram illustrates a quick-return linkage; actual carriage stroke is not solved.
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.
Combined Rectilinear and Rotary Motion: Shaft Transmission Calculator
Explore a shaft transmission that combines sliding and rotation. Calculate shared stroke, output turn amplitude, gear ratio and maximum axial speed.
Endless Rack Reciprocator Mechanism: How It Works, Parts, Formula and Uses Explained
Explore an endless rack with a vertically guided pinion. Calculate stroke, straight-run speed and full cycle time including the rounded-end reversals.
Rack and Pinion Mechanism: How It Works, Diagram, Formula, Calculator and Real-World Uses
Rack and Pinion explained — how the gear-and-bar mechanism converts rotation to linear motion, with formulas, real automotive steering examples, and design tradeoffs.
Worm Screw Rack: Animation and Lead-Speed Calculator
Calculate ideal rack speed from screw lead and rpm, then compare torque-speed power and an efficiency-scaled thrust estimate. Self-locking is not predicted.
Reciprocating Rectilinear Motion Mechanism: How It Works, Diagram, Formula and Uses Explained
Explore alternating gear sectors driving a double-sided rack. Calculate circular pitch, pitch radius, ideal engaged travel and sector sweep.
Mangle Rack: Fixed Pinion and Reciprocating Double Rack
Explore a fixed-axis pinion driving alternating upper and lower racks. Calculate ideal straight-engagement travel, speed and time; end-transfer timing is excluded.
Sliding Contact Mechanism Explained: How It Works, Diagram, Parts, Formula and Uses
Explore a block sliding in a fixed guide. Calculate Coulomb friction and frictional power from selected normal load, coefficient and speed.
Slider (mechanism) Explained: How It Works, Parts, Slider-Crank Formula, Diagram and Uses
How a slider mechanism works, where it fits in industry, plus a worked example with formulas, tradeoffs and FAQs from FIRGELLI engineers.
Lead-Screw Mechanical Translation Calculator
Explore a guided lead-screw drive and calculate ideal turns, travel, speed and torque-derived thrust using entered lead, speed, run time and efficiency.
Screw Traversing Ball Bearing Mechanism: How It Works, Diagram, Parts, Formula and Uses
Screw Traversing Ball Bearing explained — how this mill mechanism converts screw rotation into linear carriage travel, with worked numbers and named industrial examples.