parallel keys

In music theory, a major scale and a minor scale that have the same tonic note are called parallel keys and are said to be in a parallel relationship. The parallel minor or tonic minor of a particular major key is the minor key based on the same tonic; similarly the parallel major has the same tonic as the minor key.

Parallel keys Square keys are used for smaller shafts and rectangular faced keys are used for shaft diameters over 6.5 in (170 mm) or when the wall thickness of the mating hub is an issue. Set screws often accompany parallel keys to lock the mating parts into place.

Parallel keys, also known as straight keys, have been in use for centuries.

What Is the Difference Between Relative Keys and Parallel Keys? In music theory, relative scales and parallel scales are not the same thing. A relative minor scale uses all the same notes as its related major scale; a parallel minor scale has the same tonic (or first note of the scale) as its related major scale.

A key attached to one member of a pair and which permits relative axial movement is known as feather key. It is a special type of parallel key which transmits a turning moment and also permits axial movement.

D major

parallel keys have different key signatures, but seeing them on the circle of fifths illustrates their consistent key relationship: minor keys always appear three degrees counterclockwise from their parallel major key.

Feather Keys are shaft keys that transmit torque from a shaft to a driven component. The feather keyway design is similar to parallel keys, except they are manufactured with radiused ends.

Parallel Keys. Parallel keys, also called straight keys, include square and rectangular styles. The shafts they are used on usually have a slot running their length to accommodate the keys. Technicians install them by lining up the key slots in the shaft and component being attached to the shaft and pressing in the key ...

C minor C major

For instance, if we consider the C major scale, its parallel minor scale would be C minor. This is because they both share the same tonic note, C. Likewise, if we take the A minor scale, its parallel major scale would be A major.

Parallel square and rectangular keys are normally side fitting with top clearance and are usually retained in the shaft rather, more securely than in the hub. A Woodruff Key is a half moon shaped key that is inserted into a curved slot in the shaft.