Harley Davidson Engine  cutaway

This has got to be one of the largest bench vise’ ever made.

Source: https://imgur.com/SWqMdtg

Watch How Steel Ribbons Are Shaped into Cookie Cutters

Constant-velocity joints (aka homokinetic or CV joints) allow a drive shaft to transmit power through a variable angle, at constant rotational speed, without an appreciable increase in friction or play. They are mainly used in front wheel drive vehicles, and many modern rear wheel drive cars with independent rear suspension typically use CV joints at the ends of the rear xle halfshafts and increasingly use them on the propshafts (drive shafts).

Macro-Gif of a drill head.

This stunning, working engine took 2,500 hours to build from scratch

300 Ton Crankshaft in the World’s Biggest and Strongest Diesel Engine (109,000HP) [429x643]

Source: https://openpics.aerobatic.io/

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simple past