Recent Blogs
Whitworth Quick-return: Angular Timing and Clearance Comparison
Compare ideal working and return crank sweeps, plus clearance against an assumed 0.050 mm reference. Stroke, linkage closure and wear are not calculated.
Slotted Lever Motion Mechanism Explained: How It Works, Quick Return Geometry, Parts and Uses
Explore a crank and slotted lever, its tangent reversal positions, and the ideal work-to-return time ratio.
Quick-Return Motion: Declared Crank-Arc Timing Ledger
Quick return mechanism explained — how the unequal forward and back stroke speeds up shaper, slotter and metalworking machines. Formulas, ratios and worked example.
Reciprocating Motion: Whitworth-type Quick-return Timing Comparison
Compare assumed working and return crank sweeps at constant input speed. The diagram illustrates a quick-return linkage; actual carriage stroke is not solved.