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Jewel Bearing Ruby Sapphire Cup Jewel Bearing

Jewel Bearing Ruby Sapphire Cup Jewel Bearing is generally used with a semi-spherical pivot or in a design that fits a ball bearing between two cup jewels. Cup jewels are widely used for vertical shaft applications.

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Description

Jewel Bearing Ruby Sapphire Cup Jewel Bearing
A cup jewel is generally used with a semi-spherical pivot or in a design that fits a ball bearing between two cup jewels. Cup jewels are widely used for vertical shaft applications.

Typical Applications: Meters, Compasses, Heat Monitors

Cup jewel bearings are generally used in vertical shaft applications.
WDQ OPTICS offers high-quality Cup jewel bearings for wide industrial applications such as electronic meters, hot water meters, liquid measuring instruments, movement system of single-phase, and triphase KHW meter.
UltiTech has the capability of creating high-precision cup jewels as per customers’ specifications from Sapphire or Ruby.
Common types of cup jewels include spherical cup jewel bearing, conical cup jewel bearing, single-cup jewel bearing, and double cups jewel bearing.
Material: Synthetic sapphire/ruby single-crystal α-Al2O3, natural agate, crystallite glass and ceramic, etc.

MAIN MADE CORUNDUM PROPERTY
General	Chemical Formula	Al2O3
	Crystal System	Trigonal
	Class	Hexagonal-scalenohedral
	Melting Temperature	2030°c
Thermal	Thermal Expansion	Parallel to C-axis: 6.7× 10-6

		Perpendicular to C-axis: 5.0×10-6
	Specific Heat	0.18 Cal/gmoK（25℃）
Mechanical	Density	3.98 ~ 4.1g/cm3
	Hardness	9Moh’s Scale
		（Hv）≥1700kg/mm2
	Modulus Of Elasticity	340-380Gpa
	Compressive Strength	2.1Gpa
	Tensile Strength	0.19Gpa
Optical	Index of Refraction	Parallel to C-axis:1.769

		Perpendicular to C-axis:1.76
	Index of IR Transmission	85%
Electrical	Electrical Resistance	1016 Ω/cm(25°c)
	Dielectric Constant	7.5-10
Chemical	Corrosion Resistance	Can not be corroded by acid or alkali at normal temperature, only can be corroded by HF at 300°c

Those parts are manufactured according to the customer’s design and specifications, synthetic sapphire blank, cup bearing, stick, balls, windows, and other special parts according to the customer's drawings or request.

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