Getting golfers into the right shaft is the second biggest lever a fitter can pull to influence the performance of a club.

It has six gears: five stepped gears and one drive gear on the input shaft. First tests are accomplished with a 3D-printed handle, similar to a hand crank used to start really old cars.

Universal joints allow drive shafts to move up and down with the suspension while the shaft is moving so power ... is a “clank” sound when a drive gear is engaged. On front-drive vehicles ...

Shaft-annealed pinion gears require little or no set screw tension to stay in place on a slotted drive shaft. If using hot water to improve the gear side of things is too low-tech, there’s ...

The forces acting on the teeth are identical for both gears, but their moments are different: If the driven gear is made larger is will rotate more slowly but with a greater moment. For example ...