Hq-tech - Machines!!!

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).

A silicon crystal being grown by the Czochralski process at the Raytheon Corp. semiconductor plant in Newton, Massachusetts, USA, in 1956 for use in the first silicon transistors. The transistor was invented in 1946, and the Czochralski process was first used to grow silicon crystals to make the first silicon transistors at Bell Labs in 1953, so this is one of the earliest silicon crystal production plants.

A casting mold for a wind turbine blade, courtesy r/Pics (1280 x 720).

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

                                        Snap On  1927

Arc furnace

Source: https://imgur.com/6KPYeAl