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2. Jack (device) - Wikipedia

   en.wikipedia.org/wiki/Jack_(device)

   The screw version of the bottle jack works by turning a large nut running on the threaded vertical ram at the neck of the body. The nut has gear teeth, and is generally turned by a bevel gear spigotted to the body, the bevel gear being turned manually by a jack handle fitting into a square socket. The ram may have a second screwed ram within it ...

3. Jackshaft - Wikipedia

   en.wikipedia.org/wiki/Jackshaft

   Modern jackshafts and countershafts are often hidden inside large machinery as components of the larger overall device. In farm equipment, a spinning output shaft at the rear of the vehicle is commonly referred to as the power take-off or PTO, and the power-transfer shaft connected to it is commonly called a PTO shaft, but is also a jackshaft.

4. Jackshaft (locomotive) - Wikipedia

   en.wikipedia.org/wiki/Jackshaft_(locomotive)

   A Crocodile of the Swiss Federal Railways.Each set of 6 driving wheels is driven by a jackshaft between the driving wheels, gear-driven by a pair of traction motors. A jackshaft is an intermediate shaft used to transfer power from a powered shaft such as the output shaft of an engine or motor to driven shafts such as the drive axles of a locomotive.

5. Jackscrew - Wikipedia

   en.wikipedia.org/wiki/Jackscrew

   A machinist's jack is a miniature screw jack used to support protruding parts of a workpiece or to balance clamping forces on that workpiece during machining operations. Aside from their size, these frequently look no different from the screw jacks used to lift buildings off their foundations.

6. Jacking gear - Wikipedia

   en.wikipedia.org/wiki/Jacking_gear

   The jacking gear motor is generally designed to rotate the shaft at approximately 1/10 rpm. Most jacking gear motors are rated at 5hp. The jacking gear motor assembly applies power and torque to the reduction gear by a flexible coupling or clutch that can freely engage and disengage to the high-pressure pinion (driving gear).

7. Pinion - Wikipedia

   en.wikipedia.org/wiki/Pinion

   the typically smaller gear in a gear drive train (although in the first commercially successful steam locomotive—the Salamanca—the pinion was rather large). [1] In many cases, such as remote controlled toys , the pinion is also the drive gear for a reduction in speed, since electric motors operate at higher speed and lower torque than ...