Recent Blogs
Four-pulley Two-speed Drive: Ideal Ratio Comparison
Compare two ideal no-slip speed ratios and their paired pitch-diameter sums. Equal diameter sums alone do not establish that the same belt fits both positions.
Shifting Device for Cone Pulleys: How It Works, Parts, Diagram, and Speed Ratio Calculator
How a shifting device for cone pulleys works on lathes, drill presses, and line-shaft machinery — belt fork geometry, ratio steps, and worked sizing example.