Recent Blogs
Throw-away Wheel Mechanism Explained: How Centrifugal Release Works, Parts, Uses, and Formula
How a throw-away wheel works, where it's used in foundries and pyrotechnics, plus a worked example sizing rim mass for a 200 RPM rotary launcher.
Throttle Valve Mechanism Explained: How It Works, Parts, Diagram, and Cv Flow Formula
How a Throttle Valve regulates fluid flow in engines, hydraulics, and HVAC — working principle, sizing formula, worked example, and failure modes from FIRGELLI.
Thomas Coupling Mechanism Explained: How It Works, Parts, Formula and Uses
Thomas Coupling explained — how the double-flex disc coupling handles shaft misalignment in pumps, generators and marine drives. Engineering guide from FIRGELLI.
Synchronization Gear Mechanism: How WWI Gun-Propeller Timing Works, Parts, and Uses Explained
Synchronization gear lets aircraft fire machine guns through a spinning propeller. Learn the timing math, history, and engineering behind it — FIRGELLI guide.
Switching Mechanism Explained: How It Works, Diagram, Parts, Formula and Uses
How a switching mechanism works, the snap-action geometry behind it, and where it shows up — from elevator controls to medical infusion pumps.
Stiction Mechanism Explained: Breakaway Force, Stick-Slip & Valve Control Diagram
Stiction is the static-to-kinetic friction jump that causes stick-slip, valve hunting, and servo dead-band. Learn how to measure, model, and design around it.
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
How a Solenoid Valve works — coil, plunger, seat, and orifice sizing. Real flow calcs, failure modes, and named applications across industry and irrigation.
Sliding Contact Mechanism Explained: How It Works, Diagram, Parts, Formula and Uses
Sliding Contact Mechanism explained — how sliding pairs transmit motion, real applications in CNC machines, presses, and engines, plus a worked sizing example.
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
Slide valve mechanism explained — how a sliding port plate directs steam or fluid flow, with worked example, design tradeoffs, and named locomotive applications.
Shuttle Valve Mechanism Explained: How It Works, OR Logic Diagram, Parts, Uses & Sizing Formula
Shuttle valve explained — how the OR-logic spool selects the higher of two pressure inputs, with worked example, sizing math, and aerospace and mining uses.
Shock Absorber Mechanism Explained: How It Works, Parts, Damping Formula and Cutaway Diagram
How a shock absorber works, the damping force formula, and worked examples for automotive, motorcycle, and industrial suspension design.
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 Rifle Mechanism: How the Rolling Block Action, Hammer Lockup, and Parts Work
How the Remington rolling-block rifle action works — breech geometry, hammer timing, and lockup forces — plus sizing math for armourers and historical-arms restorers.