Recent Blogs
Dake Square Piston Engine: How It Works, Diagram, Parts, and Uses in Steam Hoists and Pumps
How the Dake Square Piston Engine works — the oscillating square piston mechanism that replaced crankshafts in 19th-century portable steam plants and pumps.
Columbia Stoker Mechanism Explained: Underfeed Retort, Worm Feed, Tuyere Parts and Sizing
Columbia Stoker explained — how this underfeed coal stoker feeds steam boilers, sizing the worm feed rate, real heritage power applications and design tradeoffs.
American Boiler Stoker Mechanism: How Underfeed Coal Firing Works, Parts, and Diagram
Learn how the American boiler stoker feeds coal automatically — ram strokes, retort sizing, air zoning, and worked-example combustion rates for power plants.
Jones Mechanical Stoker Explained: How It Works, Parts, Diagram, and Coal Feed Formula
How the Jones Mechanical Stoker feeds coal to locomotive fireboxes — screw conveyor, steam jets, distribution table, and sizing math for heritage steam crews.
Feed Worm and Air Blast Mechanism Explained: How It Works, Diagram, Parts, Uses and Sizing Formula
Feed Worm and Air Blast explained — how the screw conveyor and pneumatic dispersal feed pulverised fuel into industrial boilers, with formulas and a worked...
Bartrum and Powell Rotary Engine Mechanism: How It Works, Diagram, Parts and Uses Explained
How the Bartrum and Powell rotary steam engine works — abutment vane geometry, sealing limits, indicated power formula, and a worked rebuild example.
Lift Pump (form 1) Mechanism Explained: How It Works, Diagram, Parts, Uses, and Flow Calculator
Lift pump explained — how the suction-stroke mechanism raises water from wells, sizing math, real applications in farming, mining and heritage restoration.
Flexible Ball Joint Mechanism Explained: How It Works, Parts, Diagram, and Sizing Calculator
Flexible ball joints absorb thermal growth, vibration, and misalignment in hydraulic and steam piping. Learn the math, sizing, and failure modes engineers use.
Fairburn Bailing Scoop Mechanism Explained: How It Works, Parts, Geometry, and Flow Formula
Fairburn Bailing Scoop explained — how this hydraulic dewatering scoop lifts standing water, sizing maths, real mining and marine examples, and failure modes.
Drainage Wheel Mechanism: How Scoop Wheels Lift Water with Diagram, Animation, Parts and Calculator
Drainage wheel explained — how scoop-wheel pumps lift low-head water for fenland drainage, polder reclamation, and mine dewatering. Sizing formula and worked example.
Variable Reciprocating Motion Mechanism Explained: How It Works, Diagram, Formula and Uses
Variable reciprocating motion converts rotation into back-and-forth strokes with changing speed or length. See how it works, the formula, and real machine examples.
Variable Circular Motion Mechanism Explained: How Non-Circular Gears Create Dwell and Variable Speed
Variable circular motion explained — how non-circular gears, elliptical pairs, and eccentric drives produce changing angular velocity for indexing, packaging, and printing.
Sun and Planet Gear Mechanism Explained: How Watt's Epicyclic Drive Works, Parts, Diagram, Uses
Sun and Planet Gear converts reciprocating motion to rotary drive at 2:1 speed gain. See how James Watt's 1781 mechanism works, with formulas and real...
Internal Spur Gear and Pinion Mechanism: How It Works, Diagram, Parts, Formula and Uses Explained
Internal Spur Gear and Pinion explained — how the internally toothed ring and pinion transmit power in planetary drives, hoists, and automotive starters.
Geared Grip Tongs Mechanism Explained: How Meshed Gear Sectors Multiply Clamping Force
Geared Grip Tongs multiply hand force through meshed gear teeth at the pivot — used in foundries, blacksmithing, and recovery work to clamp hot or...
External/internal Mutilated Gear Reverse: How It Works, Diagram, Parts and Uses Explained
How an external/internal mutilated gear reverse works — toothless sectors flip drive direction without a clutch, used in textile, packaging, and reel drives.
Conical Bevel Pinion with Spiral Studs: Mechanism, Diagram, Parts, and Uses Explained
Conical bevel pinion with spiral studs explained — how the helical stud engagement transmits motion at right angles, with real specs and a worked sizing...
Mercury Switch Mechanism Explained: How It Works, Tilt Angle, Parts, and Uses
Mercury switch explained — how the tilt-activated liquid-metal contact works, where it's still used in HVAC and industrial sensing, plus a worked tilt-angle example.
Human Treadmill Mechanism Explained: Belt, Deck, Drive Roller, Incline Actuator and Motor Power
How a human treadmill mechanism works — belt, deck, rollers, drive motor — with formulas, sizing examples and real applications in fitness, rehab and gait...
Hotchkiss Magazine Gun Mechanism Explained: Gas-Operated Action, Strip Feed, and Parts Diagram
How the Hotchkiss Magazine Gun works — gas-operated rotary feed, fortress and naval use, cyclic rate calculations, and design tradeoffs explained by FIRGELLI engineers.
Hand Pump Mechanism Explained: How It Works, Parts, Uses, and Flow Rate Formula
How a hand pump works — piston, plunger, and diaphragm types explained with flow rate formulas, real applications, and sizing examples for off-grid water systems.
Bellows Coupling Mechanism Explained: How It Works, Diagram, Parts, Formula and CNC Servo Uses
Bellows couplings transmit torque between misaligned shafts in CNC and servo systems. Learn how they work, sizing math, failure modes, and selection tradeoffs.
Wire-bending Machine Mechanism Explained: How It Works, Parts, Springback Formula & Uses
How a CNC wire-bending machine works — rollers, mandrels, cut-off, and the springback formula. Real numbers from spring, automotive, and wire-form shops.
Taper Tube Rolls Mechanism: How Tapered Pole Roll Forming Works, Parts, Formula and Uses
Taper Tube Rolls reduce thick-wall tube into tapered shafts and poles. See the geometry, roll-pass design, and real mill examples used in tower fabrication.
Spring Friction Clutch Mechanism: How It Works, Parts, Formula and Factory Uses Explained
Spring Friction Clutch explained — how it works, torque formula, worked example, and real factory uses in textile, packaging, and machine-tool drives.