Courses from 1000+ universities
AI got cheap enough that Duolingo’s most expensive plan may not survive it. I read the earnings call transcript and opened the app to see what is actually changing for learners.
600 Free Google Certifications
Artificial Intelligence
Data Science
Cybersecurity
L'Italiano nel mondo
Introduction to HTML5
Umano Digitale
Organize and share your learning with Class Central Lists.
View our Lists Showcase
Discover the process of installing new cross head wrist pins from Dragonfly Engineering in a steam stoker engine restoration project with Keith Rucker.
Discover precision machining techniques for creating cross head ways on a metal planer, essential for steam stoker engine restoration and vintage machinery maintenance.
Master the process of machining flywheels for scale model engines through detailed demonstrations of turning, boring, and finishing techniques on vintage machinery.
Dive into detailed restoration techniques for rebuilding and reassembling a vintage Sellers drill grinder's rocker arm mechanism through hands-on demonstration.
Master heat treating 4140 steel using a Hot Shot oven to create a K&T 2D face mill holder with vintage machining techniques and professional metalworking methods.
Master the complete rebuild process of a Monarch 28" lathe cross slide with detailed restoration techniques and vintage machinery expertise.
Master precision machining by creating a K&T 2D 30-taper face mill holder through detailed rough turning techniques on vintage machinery equipment.
Master precision grinding techniques for K&T 2D face mill holders using the Brown & Sharpe No. 13 Universal Grinder, focusing on achieving perfect squares and tapers.
Discover vintage machinery techniques through viewer mail responses, file sharpening methods, and steam engine indicator demonstrations in this hands-on workshop session.
See the ongoing repair of a Vulcan steam locomotive’s cylinder and piston.
Master steel frame and wooden top workbench fabrication techniques for your workshop in this hands-on metalworking and woodworking tutorial.
Discover the restoration process of a vintage John Deere Hercules cane mill as Keith Rucker demonstrates building a new base for this historic agricultural machinery.
Master precision machining techniques for steam engine valve sleeves through hands-on boring and turning operations on vintage machinery.
Demonstration of pouring Babbitt bearings for John Deere and Goldens’ cane mill machinery.
Master precision machining techniques by fabricating replacement pistons for a vintage steam stoker engine using traditional metalworking methods and machinery.
Get personalized course recommendations, track subjects and courses with reminders, and more.