Recent Blogs
Disc Brake Mechanism: How It Works, Parts, Formula, and Real-World Uses Explained
Explore a single-piston floating disc brake. Calculate ideal pad force and braking torque from hydraulic pressure, piston diameter, friction and effective radius.
Watt Parallel Motion: Linkage Illustration and Coupler Division
Explore a fixed illustrative Watt four-bar and calculate an inverse-length coupler division. Entered dimensions do not define a complete custom linkage.
External Geneva Drive: Index and Dwell
Explore an external Geneva drive and calculate index, engagement and dwell angles from slot count, plus the driver period from rotation speed.
Sliding Clutch-box Mechanism Explained: How It Works, Parts, Diagram, Formula and Uses
Sliding Clutch-box explained — how the sliding dog clutch engages gears in tractors, lathes, and gearboxes, with formulas, tolerances, and a worked example.
Spatial RSSR Linkage Mechanism: How It Works, Parts, Diagram and Uses Explained
The Spatial RSSR Linkage transfers rotation between non-parallel shafts using two ball joints. See how it works, the formula, and real industrial examples.
Bennett's Linkage Mechanism Explained: How It Works, Geometry, Formula, Uses & Animation
Explore Bennett’s spatial four-revolute linkage. Compare alternating lengths and twists, required-angle solutions and ideal closure, with mismatches shown as open chains.
Prouty-Noble Self-Winding Brake: Cone-Clutch Chain Spool
How the Prouty-Nooje automatic brake works in elevators and hoists — engagement physics, sizing formula, worked example, and failure modes from FIRGELLI engineers.
Barker's Mill / Water Wheel: How This Reaction Turbine Works, Parts, Formula and Uses Explained
How a Barker's Mill water wheel works — reaction-driven rotation, design formulas, real-world applications in milling and hydropower demonstrations.
Sliding-and-rotating Prism in Cylinder: How This Two-DOF Kinematic Pair Works, Parts, and Uses
Explore independent rotation and sliding of a hexagonal prism in a circular bore. Calculate its ideal corner envelope, section area and engagement ratio.
Helical Gear Pair: Ideal Force-Component Calculator | FIRGELLI
Calculate tangential and axial force magnitudes from torque, pitch diameter and helix angle. Contact ratio is entered, and gear strength and bearing life are not...
Gear-Tooth Higher Pair: Involute Gear Geometry Calculator | FIRGELLI
Calculate nominal spur-gear ratio, driven speed, centre distance and pitch-line speed. Explore how pressure angle changes the base circles and line of action.
Cylindrical Pair (revolute) Mechanism Explained: How It Works, Diagram, and Uses
Explore a journal with axial retaining collars. Calculate projected bearing area, nominal radial pressure and length-to-diameter ratio from load and dimensions.
Cylinder-on-cylinder Lower Pair Mechanism: How It Works, Diagram, Parts and Uses Explained
Explore independent sliding and rotation in a cylindrical joint. Compare bore and shaft diameters to calculate signed radial and diametral clearance.
Three-wiper Frame Reciprocator: Shaft Geometry
Explore Brown movement 128, with three wipers on one shaft driving one frame. Compare displayed wiper directions and tip-circle diameter; exact frame stroke is not...
Inverse Cam: Illustration and Circular Arc-to-Angle Calculator | FIRGELLI
View an illustrative profiled follower and convert circular arc length to central angle. The calculator does not predict cam-profile tolerance or output error.
Continuous Rotary Cam to Alternating Bar Mechanism Explained: How It Works, Parts, Diagram, Uses
Explore a three-lobed cam driving an opposed-roller yoke. Compare cycle rate, peak bar speed, inertia force and guide reaction for a harmonic profile.
Beveled Disk Cam to Rod Mechanism: How It Works, Diagram, Formula, and Uses Explained
Explore a rotating inclined disk driving a guided axial rod. Calculate stroke, peak velocity and acceleration from contact-track diameter, inclination and shaft speed.
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.
Swinging-block Linkage: Ideal Angle-ratio Calculator
Compare ideal larger and smaller crank-angle intervals and their constant-speed time ratio from entered crank radius and center offset.
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.
Inverted Slider-Crank: Oscillating-Axis Swing Calculator | FIRGELLI
Calculate the angular envelope of an oscillating axis from crank radius and trunnion spacing, with an explicit C greater than r condition. Piston travel and...
Engine Uncoupling via Slotted Ring (form 1): How the Mechanism Works, Parts & Uses Explained
Explore engaged slotted-ring coupling geometry. Compare pin diameter, slot opening, backlash take-up and ideal torque from a wall-normal force.
Endless-groove Disk and Vibrating Arm Mechanism: How It Works, Parts, Diagram and Uses
Explore a grooved face cam driving a fixed-length oscillating arm. Compare chord travel, swing angle, groove width and local centreline curvature.
Continuous Rotary via Two Paired Link Cranks: How the Mechanism Works, Parts & Uses Explained
Explore two crank pairs connecting parallel shafts. Compare phase offsets and normalized torque contributions from two ideal equal-force coupling rods.
Bell-crank Lever with Slotted Disk Crank Mechanism: How It Works, Diagram, Parts and Uses
How a Bell-crank Lever with Slotted Disk Crank converts rotary motion into timed angular output for indexing, valve gear, and textile machinery applications.