Recent Blogs
Mortise Lock Mechanism Explained: How It Works, Parts, Diagram, and Sizing Formula
How a Mortise Lock works — internal lever mechanism, backset and case sizing, BHMA grades, and where commercial doors use it. Engineering breakdown from FIRGELLI.
Geared Continuous Hinge Mechanism: How It Works, Parts, Diagram & Load Calculator
Geared continuous hinge explained — how the meshed gear teeth carry load along the full door length, where to use it, and how to size...
Hinge Mechanism Explained: How It Works, Parts, Diagram, Calculator and Load Formula
How a hinge works as a single-axis revolute joint, with formulas, load math, and real-world examples from architectural hardware to aerospace door fittings.