Recent Blogs
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.
Oblique-Disk Reciprocator: Brown Item 95
Explore the oblique disk and upright resting follower in Brown item 95. Calculate ideal sinusoidal displacement and full stroke from contact radius and disk tilt.
Triangular Eccentric: Threefold Form and Height Comparison
Explore a schematic triangular form and compare two defined geometric heights. The calculation does not determine a cam profile or follower stroke.
Yoke-bar Reciprocator From Disk Crank: How It Works, Diagram, Formula and Uses Explained
Watch a disk crank drive a guided yoke. Compare ideal position, stroke, velocity and acceleration from crank radius, angle and rotational speed.
Endless-spiral Cylinder Crank Substitute Mechanism: How It Works, Diagram, Formula & Uses
Explore a closed helical barrel cam with rounded reversals. Calculate stroke, cycle rate, mean axial speed and straight-flank clearance play.
Slider-crank Linkage Mechanism: How It Works, Diagram, Formula, Parts, and Real-World Uses
Slider-crank Linkage explained: how it converts rotation to linear motion, real engine and pump examples, sizing math, and tolerance rules from FIRGELLI engineers.
Reciprocating Transmission: In-line Slider-crank Geometry
Calculate stroke, rod length, slider displacement and full-cycle mean speed for an ideal in-line slider crank. Forces and machine performance are not modeled.
Variable Crank Throw: Ideal Stroke and Screw Adjustment
Calculate ideal stroke from crank radius and stroke change per radial screw turn. Compare radius with an explicitly entered symmetric span; actual slot capacity and...
Positive Shuttle Motion: Valid Closed-Groove Cam Schedule
Positive Shuttle Motion drives a carriage back and forth with locked timing — how it works, formula, design tradeoffs, and named examples in textile and...
Internal Rack Reciprocator: Pitch Speed and Nominal Rate Calculator | FIRGELLI
Calculate metric pinion pitch diameter, pitch-line speed and nominal traverse rates from an entered stroke. Tooth handoff and real cycle dynamics are not solved.
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.
Combination Disk-and-arm Reciprocator Mechanism: How It Works, Parts, Formula and Uses
Explore a rotating disk, rocker arm and guided slider. Change link dimensions to compare output stroke and rightward/leftward travel times at constant crank speed.
Doubling the Length of a Crank Stroke: How the Rack-and-Pinion Mechanism Works
Explore a crank-driven rack stroke doubler. Set crank radius, rod length and pinion size to calculate output stroke, live speed and sampled peak speed.
Complex Alternating Reciprocal Motion Mechanism Explained: How It Works, Parts, Diagram and Uses
Explore compound reciprocation from a fixed sun, equal planet gear and slotted yoke. Calculate slider position, span and additional reversals as the pin offset changes.
Air-pump Movement Mechanism: How It Works, Diagram, Parts, Formula and Industrial Uses Explained
Explore a geared crank-slider air-pump drive. Calculate piston stroke, cycle rate, frequency and mean piston speed from crank offset, motor rpm and gear ratio.
Shuttle Motion Mechanism: How Slider-Crank Reciprocation Works, Parts, Uses & Diagram
Explore a generic crank-driven shuttle carriage on straight guides. Calculate stroke, rod length, cycle rate and mean speed from selected dimensions.