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A headshell is a head piece designed to be attached to the end of a turntable's or record player's tonearm, which holds the cartridge. [1] Standard catridges are secured to the headshell by a couple of 2.5 mm bolts spaced 1/2" apart. Older, non-metric cartridges used #2 (3/32") bolts. [2]
It is sometimes called the Swedish wheel or Ilon wheel after its inventor, Bengt Erland Ilon (1923–2008), [1] who conceived of the concept while working as an engineer with the Swedish company Mecanum AB, and patented it in the United States on November 13, 1972. [2] It consists of a series of rubberized external rollers set at a 45° angle ...
The Series II [10] arm was SME's first arm. It came in two variants the 3009 and 3012 (9" and 12" respectively) tone arms which were widely adopted for audiophile and broadcast use during the 1960s and 1970s, at the higher end of the market.
A tonearm with the dial for anti-skating adjustment.. Turntable anti-skating is a feature used in phonograph turntables to prevent skating of the tonearm.. Due to the offset between the cartridge's axis (which is approximately tangential to the disc) and the tonearm's pivot, the force applied (through friction) by the rotating disc to the cartridge tends to draw the tonearm toward the center ...
Tapered roller bearings were a breakthrough at the end of the 19th century because bearings used in wheel axles had not changed much since ancient times. They consisted of a cylindrical seat on the frame and part of the axle enclosed in a case or box that held a lubricant.
Straight wheel. To the top is an image of a straight wheel. These are by far the most common style of wheel and can be found on bench or pedestal grinders. They are used on the periphery only and therefore produce a slightly concave surface (hollow ground) on the part. This can be used to advantage on many tools such as chisels.