95% Alumina Al2O3 Ceramic Motor Shaft Sleeve Bearing Bushing 4mm

• Refractoriness (℃): Refractoriness> 2000
• Feature: Long Time Materials
• Type: Heat-Resistant Material
• Shape: Pipe
• Material: Alumina
• Alumina: Sillimatin 60 C 530, Alsint 99.7 C 799
• Model NO.: GT-252
• Size: Od 8-50
• Color: White, Pink Cream
• End: Oec or Beo
• Application: High Temperature Resistant, High Wear Resistance
• Finish: Collar, Slot, Curve
• Transport Package: Plywood Case
• Specification: Rohs
• Trademark: shangtao
• Origin: Shanghai, China
• HS Code: 8547100000
• Production Capacity: 500000 PCS Per Year

Product Description

Gongtao company mainly produce alumina tubes, rods and various industrial ceramic parts, which are mainly used in thermalcouple temperature, liquid steel continous temperature, various industrial furnace(containig vacuum furnace, carburizing furnace, wire furnace, atmosphere furnace etc), especially widely used in petrochemical, spinning, electric, instrumentation, mechanical workout, military project etc industry.


Sillimatin 60 Type C 530, Alsint 99.7 Type C 799 and Pythagoras Type C 610, all complying with DIN VDE 0335.
The main applications are in the area of thermal processes. Protection tubes, insulators, radiant tubes, support tubes for electric heaters, beams, profiles, incineration aids and special fabrications.
The Impervious Materials are:
Alsint(Re-crystallised Alumina) is rated to 1700oC
Pythagoras(Aluminous Porcelain) is rated to 1400oC
The Porous Material is:
Sillimantin 60 and is rated at 1350oC
Sillimantin has better thermal shock resistance and is used mainly in furnace tubes, however can be used as an outer protection sheath if thermal shock is critical.

Our items are various and exported to many countries. Welcome to contact us!

Dimension		Outer dia. mm	Inner dia.mm	Length mm	Remark
Item
Thermocouple protection tube		7-120	1-110	10-2000	If you need others,we can customize for you.
Insulated tube	Single hole	2-120	1-110	10-2000
(inner core)	Double holes	1-10	0.4-2	10-2000
	Four holes	2-10	0.5-2	10-2000

Property of material:

Material	85 Al2o3	90 Al2o3	95 Al2o3	99 Al2o3
Al2o3	85%	90%	93%	99.30%
Fe2o3	≤ 1.0	≤ 0.5	≤ 0.5	≤ 0.3
Desnsity: g / cm3	3.4	3.5	3.6	3.85
Vickers Hardness	≥ 8.6	≥ 8.8	9	9
Water Absorption:%	≤ 0.2	≤ 0.1	≤ 0.085	≤ 0.01
Refractoriness:°C	1580 °C	1600 °C	1650 °C	1800°C
Flexural Strength:Mpa	180	200	240	280
Wear Rate( at room temperature,  erosion, 100 grinding)%	≤ 3	≤ 2.5	≤ 1	≤ 0.5

 

Feature	Application	Main usage
1.Great mechanical strength	Electric appliance industry                                      Automotive industry	1.Heat treatment furnace  and toughened furnace
2.High softening temperature
3.Good resistance to thermal impact
4.Small thermal expansion coefficient	Mechanical industry               Engineer industry	2.Inner liner tube and heating  tube in electric furnace
5.Good chill and abrupt heat properties
6. Resistance to acid and alkali corrosion