Search results
Results from the WOW.Com Content Network
A jewel bearing is a plain bearing in which a metal spindle turns in a jewel-lined pivot hole. The hole is typically shaped like a torus and is slightly larger than the shaft diameter. The jewels are typically made from the mineral corundum , usually either synthetic sapphire or synthetic ruby .
The lower jewel is called the 'hole jewel', the upper one is the 'capstone' or 'end jewel'. This type of bearing is used in watches where friction is critical, such as in the balance wheel pivots. With ordinary bearings (shown in Watch jewel bearing.svg ), when the watch is vertical the shoulder of the shaft bears against the face of the hole ...
The cup-shaped depression in the top of the jewel is the oil cup; it's purpose is to hold the lubricating oil (yellow) in contact with the bearing shaft by capillary action. In wheels where friction is critical, a 'capstone' (shown in Watch jewel bearing and capstone.svg ) is added on the end to prevent the shoulder of the shaft from bearing ...
Adamant Namiki uses integrated manufacturing, handling its products from the raw material, to processing, through to polishing. Industrial jewels, such as diamond, sapphire, and ruby, are used for jewel bearings, sapphire substrates, [4] [5] exterior watch parts, semiconductor wire bonding capillaries, nozzles, LTCC [6] (Co-fired ceramic) and so on.
Jewel bearing of a balance wheel, supported by a lyre-shaped spring. The Incabloc shock protection system is the trade name for a spring-loaded mounting system for the jewel bearings that support the balance wheel in a mechanical watch, to protect the wheel's delicate pivots from damage in the event of physical shock, such as if the watch is dropped.
Nguyễn Hải Dương (born in Phong Điền District in Thừa Thiên Huế province on 15 April 1943) pen name and political name Nguyễn Khoa Điềm is a Vietnamese poet and government literary official. [1] [2] [3] He graduated from Hanoi National University of Education. [4] His work is included in the book, Six Vietnamese Poets. [5]
President Ngo Dinh Diem and family at his home in Hue (Central Viet Nam).jpg; President Ngo Dinh Diem on an inspection tour 350 km from Saigon (December, 1956).jpg; Portrait of Ngô Đình Diệm, from the book Ngo Dinh Diem of Viet-Nam.jpg; President Ngo Dinh Diem with the troops who defeated the Binh-Xuyen at Rung-Sat (May, 1955).jpg
Jewel Tower, a tower of the Palace of Westminster, in London, England; Fraternal jewels, the medals worn in both secular and religious fraternal organisations; Jewel beetles, the family Buprestidae; Jewel butterflies, various Lycaenidae; Jewel damselflies, the family Chlorocyphidae; Jewel bearing, a jewel-lined bearing commonly used in ...