Stylus Chip

When playing back a record, the most important part for both cartridge and record is the stylus which comes into direct contact with the record groove and picks up its fine vibration.

Adamant Namiki's record styluses are produced with meticulous care from the diamond material to processing, finishing, and even assembly to the cantilever to achieve ideal tracing of the record groove.

Our production process utilizes the most advanced polishing technology for the tip of the stylus that comes in contact with the groove. Our products are widely adopted by famous cartridge makers both domestically and overseas for luxury cartridges.

To guarantee quality, products are checked and quality assurance is carried out with a variety of inspection equipment including an electron microscope.

Adamant Namiki's record styluses produce hi-fi analog playback. The diamonds used for our styluses are the same high quality as those used in rings or other jewelry. This is because high grade diamonds can be processed much more precisely.

The tip of the the diamond stylus is produced with micro precision. A circular stylus has a diameter of .5 mil (0.0127mm), and an elliptical stylus has a diameter of .3 x .7 mil.

(a) Top-quality octahedral diamond is used as the raw material.

(b) Diamond powder is used to polish along the crystal axis.

In order to process the tip, the crystal is inserted into a metal rod and carefully polished.

(c) The point can be formed into desired shape, such as round or ellipse.

Afterwards, the crystal is removed from the metal rod and the opposite end is cut down.

Specifications of tips by shape

Type of tip Symbol r(μ) R(μ) T(μ) G(μ)
MicroRidge - MR 2 ~ 3 70 ~ 80 70 ~ 80 6 ~
Type III - Ⅲ 5 ~ 8 35 ~ 45 16 ~ 21 5 ~ 9
Elliptical - E /.3 x .7mil 5 ~ 10
(.2 ~ .4mil)
15 ~ 20
(.6 ~ .8mil)
Spherical - R / .5mil 10 ~ 15 (.4 ~ .6mil)
- R / .6mil 13 ~ 18 (.5 ~ .7mil)
- R / .7mil 15 ~ 20 (.6 ~ .8mil)
MicroRidge Symbol(B)- MR r(μ)2 ~ 3 R(μ)var70 ~ 80 T(μ)15 ~ 21 G(μ)6 ~
Type III Symbol(B)- III r(μ)5 ~ 8 R(μ)35 ~ 45 T(μ)16 ~ 21 G(μ)5 ~ 9
Elliptical Symbol(B)- E /.3 x .7mil r(μ)5 ~ 10(.2 ~ .4mil) R(μ)15 ~ 20(.6 ~ .8mil)
Spherical
Symbol(B)- R / .5mil R(μ)10 ~ 15 (.4 ~ .6mil)
Symbol(B)- R / .6mil R(μ)13 ~ 18 (.5 ~ .7mil)
Symbol(B)- R / .7mil R(μ)15 ~ 20 (.6 ~ .8mil)

MicroRidge

Type III

Elliptical

Spherical

Contact area ( Stylus pressure = 1.8gram )

Point Contact Line Contact
Spherical 0.7mil Spherical 0.5mil Elliptical 0.3x0.7mil Line Contact MicroRidge
Front View
A - A'
Side View
Contact Area 30.5μm2 23.4μm2 20.6μm2 46.7μm2 62.1μm2
L1/L2 1 1 1.8 6 9
Point Contact / Spherical 0.7mil Front View A - A' Side View Contact Area30.5μm2 L1/L21
Point Contact / Spherical 0.5mil Front View A - A' Side View Contact Area23.4μμm2 L1/L21
Point Contact / Elliptical 0.3x0.7mil Front View A - A' Side View Contact Area20.6μμm2 L1/L21.8
Line Contact / Line Contact Front View A - A Side View Contact Area46.7μμm2 L1/L26
Line Contact / MicroRidge Front View A - A Side View Contact Area62.1μμm2 L1/L29

How various types of reproducing styli contact record groove

How various types of reproducing styli contact record groove

Reproducing styli are different in shape from cutting stylus witch cuts record groove. This is the reason why tracing distortion at the maximum amplification is inevitable.

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