Recent Blogs
Freight-car Truck Mechanism: How the Three-Piece Bogie, Friction Wedge, Bolster & Side Frames Work
Freight-car truck explained — how the bogie suspension, side frames, and bolster carry 286,000-lb gross rail loads through curves at 60+ mph in heavy haul...
Spring-loaded Camming Device Mechanism: How It Works, Cam Angle Geometry & Parts Explained
Spring-loaded camming devices (SLCDs) protect trad climbers in parallel-sided rock cracks. How the cam geometry works, sizing rules, and real placement examples.