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
Learn to use, read, care for, lubricate, and calibrate micrometers for precision measurements in a machine shop.
Hands-on restoration of a Lucas horizontal boring mill by installing belts, clutch components, lubrication, and motor power, then testing operation.
A hands-on repair walkthrough for replacing worn feed worm gears and reassembling the feed mechanism on a Marvel band saw.
Learn to restore and use a Norton Multi-Oilstone for effective tool sharpening. Covers reconditioning, restoration, and practical application techniques for chisels and other tools.
Detailed restoration process of a vintage cane mill, including turning roller journals, pressing gears, and evaluating castings. Learn hands-on techniques for preserving industrial machinery.
Restore precision to a worn four-jaw chuck through expert turning and grinding techniques, reviving its accuracy for machining projects.
Learn to measure angles and tapers accurately using a taper micrometer. Master this specialized tool for precise measurements in machining and engineering applications.
Explore the setup and testing of cutters on a 19th-century metal planer, powered by flat belts. Gain insights into vintage machinery operation and restoration techniques.
Restore a monster cane mill by brazing broken nickel welds on the main cast iron base. Learn techniques for repairing vintage machinery and preserving industrial heritage.
Discover the detailed process of crafting a pouring mandrel for babbitt bearings in vintage machinery restoration, focusing on specialized techniques for cane mill rollers.
Master the process of creating a custom motorcycle seat frame bushing through detailed machining techniques and practical metalworking demonstrations on a lathe.
Explore a failed machining project for antique brake drum castings, learning valuable lessons in precision engineering and problem-solving for vintage automobile restoration.
Learn to inspect and refresh jointer bearings, avoiding unnecessary replacement. Master techniques for maintaining vintage machinery efficiently.
Learn to machine a precise 45-degree angle using a metal planer, exploring techniques and tips for accurate metalworking on vintage machinery.
Discover techniques for modifying a metal planer crank handle, enhancing functionality and efficiency in vintage machinery restoration.
Get personalized course recommendations, track subjects and courses with reminders, and more.