著者

赤尾 祐司

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.62, no.219, pp.1-12, 2018-12-10 (Released:2020-12-15)

参考文献数

37

被引用文献数

1

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It has been 17 years that we developed the watch lubricant “AO-oil” which resolves the problems of existing watch lubricant, i.e. “gelation”, “metal corrosion”, and “temperature dependence of watch lubricant's viscosity”, caused by time decay. AO-oil has been developed especially with focusing on base oil and viscosity modifier, which extends the life of timepieces and enhances reliability. Furthermore, by enforcing higher lubrication and stability I found that the lifetime can be extended much longer. As to this development, an optimal additive has to be selected by focusing on antiwear/extreme-pressure agent and antioxidation agent. Hence, now I report on this new watch lubricant “AO-oil”.

著者

赤尾 祐司

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.61, no.217, pp.1-12, 2017-12-10 (Released:2018-10-11)

参考文献数

9

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From May 2015, leather products come in contact with human skin may not be placed on the EU market by REACH regulation if they are shown to contain over 3 ppm of Hexavalent Chromium (Cr VI). For watch strap, a large amount of chromium is contained because of chromium tanning. Even if only Trivalent Chromium is contained when manufacturing the straps, it was already proved that Hexavalent Chromium is generated subsequently by oxidation. Therefore, Hexavalent Chromium (Cr VI) Elimination Agent was developed. This agent restores Hexavalent Chromium to Trivalent Chromium and prevent oxidation of Trivalent Chromium.

著者

赤尾 祐司

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.45, no.1, pp.27-33, 2001-03-10 (Released:2017-11-09)

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With the purpose of improving performance of lubricant at low temperature and unifying lubricants to be used, we made new synthetic lubricant for watch mechamism. In this paper, we selected ester oil among several kinds of synthetic oils. We found that ester, as base oil, was superior in performance at low temperature and cahracteristic of evaporation rate, which has three ester groups in one molecule synthesized with tri-methylopropane and alkyl acid. We defined that the viscosity of the above mentioned lubricant should be 15cSt to 1000cSt at its used temperature range(-30 to 80°C). We found by evaluating performance of watches that the consumption electric current and the voltage to start moving with the lubricant at the used temperature are both almost same as with the existing lubricants. We also found by evaluating durability by accelerating test that the performance of the train wheel movement for twenty years is almost same. From the above we can obtain the new lubricant for watches which is superior in performance at low temperature and which we can apply for every part in watches.

著者

赤尾 祐司

出版者

一般社団法人 日本時計学会

雑誌

マイクロメカトロニクス (ISSN:13438565)

巻号頁・発行日

vol.45, no.1, pp.27-33, 2001

参考文献数

2

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With the purpose of improving performance of lubricant at low temperature and unifying lubricants to be used, we made new synthetic lubricant for watch mechamism. In this paper, we selected ester oil among several kinds of synthetic oils. We found that ester, as base oil, was superior in performance at low temperature and cahracteristic of evaporation rate, which has three ester groups in one molecule synthesized with tri-methylopropane and alkyl acid. We defined that the viscosity of the above mentioned lubricant should be 15cSt to 1000cSt at its used temperature range(-30 to 80°C). We found by evaluating performance of watches that the consumption electric current and the voltage to start moving with the lubricant at the used temperature are both almost same as with the existing lubricants. We also found by evaluating durability by accelerating test that the performance of the train wheel movement for twenty years is almost same. From the above we can obtain the new lubricant for watches which is superior in performance at low temperature and which we can apply for every part in watches.