jewel bearing การใช้

• It was due to the fact that the increased demand for Jewel bearing for military purposes.
• A "'jewel bearing "'is a plain bearing in which a metal jewel-lined pivot hole.
• Temperature-compensated balance wheels began to be widely used in watches during this period, and jewel bearings became almost universal.
• Hard stones such as ruby and sapphire were often used as jewel bearings to decrease friction and wear of the pivots and escapement.
• The needle is mounted on a low-friction pivot point, in better compasses a jewel bearing, so it can turn easily.
• It is part of the Swatch Group and specializes in producing jewel bearing stones, sapphire crystals and ceramic components for the watch making industry.
• Hard stones such as diamond, ruby, and sapphire were often used as jewel bearings to decrease friction and wear of the pivots and escapement.
• Jewel bearings, introduced in England in 1702 by the Swiss mathematician Nicolas Fatio de Duillier, also came into use for quality watches during this period.
• Jewel bearings are used in precision instruments where low friction, long life, and dimensional accuracy are important, but their largest use is in mechanical watches.
• Switzerland's most important exports during the war were precision machine tools, watches, jewel bearings ( used in bombsights ), electricity, and dairy products.
• It required a 17 jewel bearings, stem wound and set, with hacking, a power reserve of 36 hours and a 30-second daily accuracy rate.
• The world's unique tri-axial tourbillon movement for wristwatch with traditional jewel bearings only was invented by the independent watchmaker Aaron Becsei, from Bexei Watches, in 2007.
• In the three axis tourbillon movement, the 3rd ( external ) cage has a unique form which provides the possibility of using jewel bearings everywhere, instead of ball-bearings.
• If a gear staff ( axle ) and a jewel bearing hole were designed to be a given size, then the parts that most closely met those design goals were used in the highest grade watches.
• The staff itself does not move relative to the jewel bearing, but the whole bearing is carried in a metal bushing that is free to move in the metal endpiece, under the control of the spring.
• Benrus documents were submitted and showed that it imported the movement and dial setting, dial stem and springbars and that the case, crown, attachments, packaging material, and jewel bearings were all domestically produced.
• The pivots and jewel bearings that support a watch balance wheel are fragile in comparison to the mass they must support, and without shock protection are the part of the watch most likely to be damaged under impact.
• In 1957, Adamant separated from Namiki Precision Jewel Co ., Ltd . It started sales of jewel bearings for watches and clocks and began to manufacture cap jewel, hole jewel, impulse jewel and pallet stone.
• By the 1970s, the Kamani group as it came to be known, consisted of seven companies with several manufacturing units in Bombay, Bhavnagar and Jaipur, and doing business in varied fields ranging from metals to rubber and chemicals to jewel bearings not to mention power, in both national and global markets.
• A critical requirement for accuracy is low static friction ( stiction ) in the bearings of the pendulum; this is achieved by various means ranging from double ball bearing with a superimposed oscillatory motion to dither the bearing above its threshold or through the use of gaseous or fluid bearings or by the alternative method of floating the gyroscope in a fluid and restraining the residual mass by jewel bearings or electromagnetic means.