Courses from 1000+ universities
17 years ago, Krishna Kumar started offering free PMP prep online. Today, it’s a leading digital upskilling platform that helps millions upskill in AI, cybersecurity, data science, and more.
600 Free Google Certifications
Fundamentals of Neuroscience, Part 1: The Electrical Properties of the Neuron
Organic Chemistry 1
Mountains 101
Organize and share your learning with Class Central Lists.
View our Lists Showcase
Learn to use, maintain, and calibrate micrometers for precise measurements in machine shops, covering types, parts, reading techniques, and proper care.
Step-by-step guide for DIY installation of a MRCOOL 36,000 BTU mini-split air conditioner, covering unboxing, mounting, drilling, compressor setup, and system features.
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.
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 measure angles and tapers accurately using a taper micrometer. Master this specialized tool for precise measurements in machining and engineering applications.
Restore a monster cane mill by turning bearing journals on small crush rollers. Learn techniques for vintage machinery restoration and metalworking.
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.
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.
Master the process of creating a custom motorcycle seat frame bushing through detailed machining techniques and practical metalworking demonstrations on a lathe.
Discover techniques for modifying a metal planer crank handle, enhancing functionality and efficiency in vintage machinery restoration.
Master TIG brazing techniques for repairing a Buckeye steam whistle, focusing on red brass restoration and vintage machinery preservation.
Learn to machine a precise 45-degree angle using a metal planer, exploring techniques and tips for accurate metalworking on vintage machinery.
Discover the detailed process of crafting a pouring mandrel for babbitt bearings in vintage machinery restoration, focusing on specialized techniques for cane mill rollers.
Learn practical metalworking techniques for creating a custom trolley cross beam, including single-point threading and castle nut milling operations using machine shop equipment.
Get personalized course recommendations, track subjects and courses with reminders, and more.