Recent Blogs
Reversing Bevel Gears with Double-clutch Mechanism: How It Works, Parts, and Marine Uses Explained
See how opposed bevel gears and a sliding clutch select forward, neutral and reverse. Calculate ideal output speed and lossless torque from tooth counts.
Release Rotary Motion: Ball-Detent Torque Limiter Calculator
Estimate a ball-detent torque limiter’s ideal release threshold. Compare total preload, ball count, pitch radius, ramp angle and load torque.
Release Cam Mechanism: How It Works, Profile Geometry, Parts, and Trip Timing Explained
Calculate low-dwell, rise and high-dwell times from release-cam angles and shaft RPM. Explore the timing sequence and the limits of an abrupt release.
Rectangular and Noncircular Gears: Contact Radii and Instantaneous Speed
Explore the local speed relation behind noncircular gears. Calculate pitch-point radii and opposing output speed; complete rectangular gear profiles are not generated.
Rack Motion: Ideal Module and Pitch Geometry
Rack motion converts rotary input from a pinion into precise linear travel. Learn how engineers size rack and pinion drives in CNC, robotics, and industrial...
Pneumatic Grain Conveying: Declared Flow Ledger and Connected Suction-Blower Path
Pneumatic grain elevators move grain through pipes using high-velocity air. Learn how suction and blower systems lift wheat, corn and barley at port terminals.
Planetary Motion: Exact Fixed-Ring Speed Geometry
Planetary motion in gearing — how sun, planet and ring gears combine to deliver high torque density in robotics, automotive transmissions and wind turbines.
Movement 209: Rolling Contact with Partial Teeth and Forked Catch
Pinion driving wheel-arm mechanism explained — how the rotating pinion drives an arm-mounted gear to convert rotation into oscillation in textile and printing machinery.
Pin Wheel and Slotted Pinion: Three Selectable Speed Changes
How a pin-wheel and slotted pinion converts continuous rotation into stepped indexing motion — design rules, formulas, and real-world examples from packaging and watchmaking.
Oblique-Tooth Gears Form 2: Brown Movement 41
Explore the double-oblique gear pair in Brown movement 41. Calculate ideal driven speed, reduction ratio and mesh-event rate from tooth counts and input speed.
Oblique-Tooth Gears Form 1: Brown Movement 40
Explore the single-oblique tooth pair in Brown movement 40. Calculate ideal driven speed, reduction ratio and mesh-event rate from tooth counts and input speed.
Oblique-Shaft Gears Form 2: Brown Movement 43
Explore the shallow bevel-like gear pair in Brown movement 43. Calculate ideal driven speed, tooth-count ratio and mesh-event rate.
Oblique-Shaft Gears Form 1: Brown Movement 42
Explore crossed cylindrical helical gears on oblique shafts. Calculate ideal driven speed, tooth-count ratio and mesh-event rate for Brown movement 42.
Brown Movement 27: Three-Roller Carrier and Radial-Groove Wheel
Explore Brown movement 27: a triangular three-roller carrier and radial-groove wheel. Calculate roller pitch and radial-distance limits from center offset and orbit.
Multiple-Speed Gear Set: Three Selectable Fixed-Center Ratios
Compare three selectable spur-gear ratios at one shaft center distance. Calculate ideal output speed from tooth counts, input rpm and common module.
Rolling Contact: Ideal No-Slip Cylinder Ratio and Travel
Calculate the ideal ratio, opposite follower rotation, surface travel and center distance of two externally tangent cylinders rolling without slip.
Link Chain Hoist: Manual-Hoist Animation and Ideal Hand-Pull Calculator
Follow a manual chain hoist from hand chain to load hook. Calculate ideal hand pull from load mass and an entered mechanical advantage.
Irregular Vibratory Motion: Normalized Speed-Profile Calculator | FIRGELLI
Compare modulation depths implied by two peak-to-minimum speed ratios for a stated sinusoidal law. The plot does not calculate gears, machine vibration or screening performance.
Irregular Circular Motion: Eccentric Gear Train and Speed Calculator
Follow an eccentric circular gear and moving idler driving a fixed-axis output. Explore the speed variation of an illustrative gear-and-link arrangement.
Internal Worm Wheel: Ratio and Assumed-Efficiency Calculator | FIRGELLI
Calculate an ideal worm-input reduction, wheel speed, torque and power loss using an entered efficiency. Physical contact and self-locking are not determined.
Intermittent Spur Gear: Angular Closure Calculator | FIRGELLI
Compare toothed and locking angle shares and their signed difference from 360°. Tooth geometry, output travel and locking clearances are not calculated.
Intermittent Gears: Angular Segment Calculator | FIRGELLI
Compare toothed and locking angle shares and check whether they total 360°. Output travel, tooth geometry and working lock dimensions are not calculated.
Hypocyclic Gear Train: Fixed-Ring Count-Ratio Calculator | FIRGELLI
Compare ideal fixed-ring speed-ratio magnitudes and output rotation from ring and inner counts. Tooth profiles, output geometry and load capacity are not calculated.
Hunting Tooth Worm Gear: History and Pairing Calculator | FIRGELLI
Learn about Hiscox’s two-wheel hunting tooth arrangement and explore a separate modular pairing calculator for worm starts, wheel teeth and repeat intervals.
Globoid Spiral Gear Wheels: Spherical Spiral and Swinging Pinion
Explore a spherical spiral and a pinion carried on a swinging arm. Calculate the fixed-arm ratio and meridional pitch of a one-start example.