Recent Blogs
Screw-cutting/slide Lathe Motion: How It Works, Diagram, Parts, Formula and Uses Explained
Screw-cutting lathe motion synchronises spindle rotation to carriage travel through a leadscrew and gear train, letting machinists cut precise threads on metal lathes.
Screw-cutting Variable Pitch Mechanism Explained: How It Works, Diagram, Formula and CNC Uses
Screw-cutting with variable pitch lets machinists generate threads whose lead changes along the axis. Learn the lathe gearing, math, and applications.
Screw Stamping-press Mechanism: How It Works, Diagram, Parts, Formula and Uses Explained
Explore a weighted-handle screw press and compare rotational kinetic energy at two selected speeds with unchanged inertia.
Right-and-left Hand Screw Nut Traverse Mechanism: How It Works, Parts, Diagram, and Uses
How a Right-and-left Hand Screw Nut Traverse drives bidirectional spooling on wire winders, textile bobbins, and lab stages — formula, worked example, and design tradeoffs.
Reverse-thread Cylinder Reciprocator Mechanism: How It Works, Diagram, Parts and Uses
See how opposite-hand grooves produce back-and-forth travel from continuous rotation. Calculate ideal axial speed and travel time from pitch, rpm and stroke.
Rectilinear Motion of Slide by Screw: How It Works, Diagram, Parts and Calculator Explained
Calculate ideal screw-driven slide speed, feed and travel from lead, RPM and turn count. Compare axial backlash with one screw lead.
Spiral Push Drill: Lead and Stroke Geometry
How a Persian drill converts push force into reciprocating rotation through a quick-thread spindle. Used in jewellery, watchmaking, and dental tool design.
Movable Lathe Head: Handwheel, Screw, and Center-Spindle Travel
Explore the handwheel-driven center spindle of a movable lathe head. Calculate ideal screw travel and final extension from lead, turns and starting extension.
Differential Micrometer Screw: Same-Hand Lead-Difference
Explore a same-hand differential micrometer screw and calculate shaft motion, nut motion and net output from the two thread leads and signed turns.
Reversing Grooved Drum: Helix Lead Calculator | FIRGELLI
Calculate axial advance from groove diameter and lead angle. Explore constant-lead geometry, slope and the distinction between helix advance and a complete reversing stroke.
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.
Wood Screw: Pitch, Advance and Ideal Work Calculator | FIRGELLI
Explore wood-screw geometry and ideal axial advance. Compare pitch, core diameter, work per turn and a frictionless force bound, separate from joint capacity.
Common Screw Bolt and Nut: Thread Pitch, Axial Travel and Helix Angle
Explore single-start bolt-and-nut motion. Calculate free axial travel from pitch and turns, and compare circumference and helix angle at the entered diameter.
Archimedes' Screw Mechanism: How It Works, Parts, Formula, Diagram and Calculator
See water pockets travel through an inclined screw. Compare annular sector volume, lead, starts and estimated displacement using a fixed illustrative fill factor.
Differential Screw (compound Pitch) Mechanism: How It Works, Diagram, Formula & Uses Explained
Explore two same-hand screw leads acting through fixed and guided nuts. Calculate signed output travel and ideal motion per degree from their lead difference.