Recent Blogs
Switching Mechanism: Snap Action and Sensitivity Scenarios
Explore snap-action switch concepts and a hypothetical linear sensitivity exercise. The entered percentages are assumptions, not switch specifications.
Stiction: Breakaway Force and Friction Calculator | FIRGELLI
Compare static breakaway force, sliding resistance and applied-force margin with an animated force ramp and a worked example.
Star Wheel Mechanism: How It Works, Diagram, Parts, Formula and Industrial Uses Explained
Star Wheel Mechanism explained — how the indexing geometry works, real applications in bottling and machine tools, plus a worked example with numbers.
Sprocket Mechanism: How Chain Drives Work, Pitch Diameter Formula, Parts and Uses Explained
How a sprocket works, with the chain-pitch math, tooth-count rules, and a worked drive-sizing example for conveyors, bikes, and industrial machinery.
Spring-loaded Camming Device Mechanism: How It Works, Cam Angle Geometry & Parts Explained
Spring-loaded camming devices (SLCDs) protect trad climbers in parallel-sided rock cracks. How the cam geometry works, sizing rules, and real placement examples.
Spline (mechanical) Explained: How It Works, Diagram, Parts, Formula and Real-World Uses
Spline shafts transmit torque while allowing axial slide. Learn the geometry, formulas, and real applications in automotive, aerospace, and CNC machinery.
Solenoid Valve Mechanism: How It Works, Diagram, Parts, Cv Sizing and Uses Explained
See a normally closed solenoid valve open and close, and calculate basic liquid Cv, Kv and an equivalent orifice diameter.
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.
Slide Valve Mechanism Explained: How It Works, Diagram, Parts, Port Timing & Steam Engine Uses
Explore D slide-valve admission and exhaust connections, and calculate nominal full-port travel, eccentric throw and linear advance from selected port and lap dimensions.
Shuttle Valve Mechanism Explained: How It Works, OR Logic Diagram, Parts, Uses & Sizing Formula
See how a ball shuttle valve connects either inlet to a common outlet and blocks the other inlet. Compare incompressible-liquid Cv sizing assumptions.
Shock Absorber Mechanism Explained: How It Works, Parts, Damping Formula and Cutaway Diagram
See a monotube shock absorber in cutaway, with piston oil flow and a floating gas separator. Compare selected linear damping force and dissipation.
Servomechanism Mechanism Explained: How Closed-Loop Control Works, Parts, Diagram, and Uses
Servomechanism explained — how closed-loop feedback control works, real industry examples, sizing formula, and worked CNC example for engineers and integrators.
Servo (mechanism) Explained: How It Works, Parts, Block Diagram, and Uses
Servo mechanism explained — closed-loop position control, error feedback, and gain tuning for robotics, CNC, and aerospace actuators. Built by engineers.
Self-adjusting Ladder Mechanism Explained: Pawl-and-Rack Leveling, Parts, Diagram and Calculator
How a self-adjusting ladder works, with the leg-leveling formula, a worked example for orchard picking, and diagnostic tips for uneven ground stability.
Schmidt Coupling Mechanism Explained: How It Works, Parts, Diagram and Uses
Schmidt couplings transmit constant-velocity torque between parallel shafts with large radial offset. Used in printing, paper, and metal-forming machinery.
Rotary Actuator Mechanism Explained: How It Works, Parts, Torque Formula and Industrial Uses
How a Rotary Actuator works, the torque formula, sizing math, and real industrial examples from valve automation to robotics. Practical engineering guide.
Roneo Machine Mechanism: How a Rotary Stencil Duplicator Works, Parts, Diagram and Output Formula
How a Roneo stencil duplicator works, the rotary drum mechanism behind it, and why offices ran millions of copies on it before xerography arrived.
Roller Chain Mechanism Explained: How It Works, Parts, Pitch, and Sprocket Speed
Roller Chain explained — how the pin, bushing, and roller transmit torque, why pitch matters, and how to size chain drives for conveyors, motorcycles, and...
Rigid Coupling Mechanism Explained: How It Works, Parts, Diagram, Formula & Calculator
Rigid couplings join two shafts in perfect alignment to transmit torque without backlash. See sleeve, flange, and clamp types, sizing math, and real industrial uses.
Remington Rolling Block: Historical Illustration and Display Controls
Explore a historical Remington rolling-block illustration with separate pivots, adjustable drawing arcs and viewing speed. Outputs describe the display only.
Remington-Keene Magazine Rifle: Historical Animation and Display Timing
Explore a historical Remington-Keene bolt-action schematic with adjustable viewing speed and a calculator for animation intervals and pause percentage.
Ratchet (device) Mechanism: How It Works, Parts, Tooth Geometry, and Real-World Uses Explained
How a ratchet works, with formulas, real industrial examples, tradeoffs vs sprag and roller clutches, and a worked sizing example for a winch pawl.
Pushrod: Ideal Hollow-Column Buckling Screen
Pushrod mechanisms transmit linear force between a cam and valve or actuator and lever. Learn how engine pushrods, RC linkages, and aircraft controls work.
Block and Tackle: Supporting-Parts and Ideal Work Ledger
How a Pulley works, with the formula, real industrial examples from cranes to elevators, and engineering tradeoffs vs gears, levers and hydraulics.