Recent Blogs
Slotted Parallel Ruler Mechanism Explained: How It Works, Parts, Diagram, and Navigation Uses
Slotted parallel ruler explained — how the slot-and-pin geometry keeps drawn lines parallel, with worked examples for draughting, marine navigation and shipwrights.
Roller Parallel Ruler Mechanism Explained: How It Works, Parts, Diagram and Marine Navigation Uses
How a Roller Parallel Ruler works, the geometry behind its tracking accuracy, and why marine navigators still use it on paper charts today.
Parallel Ruler (form 2) Mechanism: How the Parallelogram Linkage Works, Parts, Diagram & Uses
Parallel Ruler form 2 explained — how the four-bar linkage holds true parallel motion across a drafting board, with formulas, tolerances, and worked examples.