Pinch wheel
Encyclopedia
Pinch wheel or pinch roller was the name used for the plastic
or rubber
wheels in an 8-track cartridge, used to guide and align the magnetic tape
. Rubber rollers were known to degrade over time, creating a maintenance issue.
Plastic
A plastic material is any of a wide range of synthetic or semi-synthetic organic solids used in the manufacture of industrial products. Plastics are typically polymers of high molecular mass, and may contain other substances to improve performance and/or reduce production costs...
or rubber
Rubber
Natural rubber, also called India rubber or caoutchouc, is an elastomer that was originally derived from latex, a milky colloid produced by some plants. The plants would be ‘tapped’, that is, an incision made into the bark of the tree and the sticky, milk colored latex sap collected and refined...
wheels in an 8-track cartridge, used to guide and align the magnetic tape
Magnetic tape
Magnetic tape is a medium for magnetic recording, made of a thin magnetizable coating on a long, narrow strip of plastic. It was developed in Germany, based on magnetic wire recording. Devices that record and play back audio and video using magnetic tape are tape recorders and video tape recorders...
. Rubber rollers were known to degrade over time, creating a maintenance issue.