BEST QUALITY OF STAINLESS STEEL BALL WITH LOW PRICE

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Tianjin
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Min Order Qty:
1000 pc
Supply Capability:
600000 pc/month

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Product Description:

 

Specifications

1 inch stainless steel ball bearing
1)100% original
2)High precision
3)good resistance and no spots
5)ISO 9001:2008 SGS

 

 

Product Description

440C bearing steel balls are our main product.

Our best precision of them is G16( the ball diameter variation is 0.4um max. )

Diameter from 2.0mm to 1'' are all ok to us.


Our hot sizes: 2.0mm 2.381mm 2.5mm 3.175mm(1/8'') 4.763mm(3/16'') 5.0mm 5.5mm 6.0mm 6.35mm(1/4'') 7.144mm(9/32'') 7.938mm (5/16'') 8.731mm 9.0mm 9.525mm(3/8'') 11.1125mm(7/16'') 12.7mm(1/2'') 9/16'' 5/8'' 3/4'' 1'' ...

Usually we also have some stock of them.

 

 

Technology

MATERIAL

C%

Si%

Mn%

P%

S%

Cr%

Mo%

Ni%

N

AISI440C

0.95-1.20

1.00
max

1.00
max

 0.03
max

 0.03
max

16.0-18.0 

0.4-0.75 

0.6

\

AISI420C

0.42-0.5

1.00
max

1.00
max

0.04
max

0.03
max

12.5-14.5

\

1.0

\

 

Precision(Grade)ball diameter variationdeviation from sphericalsurface soughnesslot diameter variationnominal ball deviation tolerance
VdwaSphRaVdwlTdn
 not over(um)    
G100.250.250.0250.5*
G160.40.40.0320.8*
G200.50.50.051*
G401.01.00.082*

 

 

Advantages

For high precision 440c stainless steel ball bearings, the roundness and surface roughness is very important.

For roundness, we use roundness measuring equipment.

For surface roughness, we use 100 times microscope and 500 times microscope.

We will check each Lot no. steel balls before packing.

 

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Q:Casting parts have poor surface finish. What sand is used to make them?
Now resin sand, coated sand and other processes are also very good surface.
Q:What should I pay attention to when designing a casting structure?
(2) in the prevention of metal mold casting misrun and cold partition should pay attention to the following problems: the structure of A casting thickness should be appropriate not too thin, especially when casting size when not too thin; the B should avoid a big level, because it makes the liquid metal in the casting. Rise slowly, and the air contact surface, easy oxidation, and because the metal type liquid metal heat quickly, quickly lose liquidity, easy to cause misrun and cold lap, slag and other defects; C casting shape should be streamlined to avoid sharp corners and has sharp change connection structure in order to facilitate the flow of liquid metal. 2 in the design of metal castings in a complex shape, if the production process is very difficult, should not affect the casting conditions, try to make the casting has simple shape, strong structure change, removed from metallic die for.
Q:How about casting parts for a year?
3, the resonance method is cast on its resonant frequency vibration 1060ndn, to eliminate the residual stress in casting.
Q:Casting pieces of plastic processing requirements can not fall off the skin,
You oily sludge!Is not the general market on the soil?If it isPlease use two groups of chemicals to reinforce the soilOr suggest your company?Do the putty or paint film after doingThat's better
Q:Where is the difference in performance between the rolled and cast parts of the same part?
Service performance: heat conductivity, friction reduction, shock absorption, heat resistance and corrosion resistanceTo compare these properties, it depends on the specific material, structure, and use of the parts. Otherwise, there is no comparisonS
Q:What kind of casting process is used for cast iron parts? And what are the cast steel parts adopted?
Corundum sand: the main mineral composition is corundum alpha -Al2O3, used for investment casting, ceramic mold casting shell materials. The olivine sand: the main mineral composition of olivine (MgFe) 2SiO4, used in cast iron, non-ferrous alloy castings and high manganese steel casting molding sand and the core sand. Silica resources in nature resources, but suitable for casting with high SiO2 content of natural silica sand is not too much. Since 1951, China has carried out a general survey of the casting sand resources in the territory, but mainly limited to the main traffic lines and major industrial cities. Survey results show that Chinese can be used for natural silica sand casting is very rich in resources, a wide range of distribution. Inner Mongolia Zhelimumeng, natural silica sand reserves amounted to hundreds of millions of tons, the particle shape close to the circular, the content of SiO2 is about 90%. Fujian, Jinjiang Dongshan sea sand, the content of SiO2 is 94 to 98%, with a low volume of mud, are good natural silica sand. Are Duchang, Yongxiu Jiangxi County Xingzi, a large number of Quaternary lacustrine deposition of silica sand, the content of SiO2 is about 90%, low iron content, alkaline oxide less, uniform size, is a good lake sand. Guangzhou, Hunan and other places have abundant easily broken weathered sandstone, processing artificial silica sand, the content of SiO2 in more than 96%, can be used for the production of steel castings. Jiangsu Nanjing red sand, sandy mud pure, moderate, strong permeability, good viscosity, high silica content, less water, fine particles, pulls out the casting is smooth, stable quality, can be made of cast iron and non-ferrous metal parts of the sand and core sand
Q:What method of casting does not rust? I think the sample is like oil
The surface of a general casting is easy to rust. In order to prolong the rusting period, antirust paint or antirust oil is usually sprayed. What you said should be anti rust oil.
Q:Casting parts in rocker arm drilling, reaming, roughness, block.
Radial drilling machine can achieve boring, reaming function, but as much as you want, according to your requirements and material to determine!
Q:What's the density of casting?
Uneven casting density is caused by uneven shrinkage of the casting during solidification.
Q:What kind of flaw detector is better for casting parts?
If the casting is very small, can be used for fixed magnetic detection machines, of course with fixed magnetic powder the testing machine, the best first contact the manufacturers, because the fixed magnetic particle testing machine belongs to the non-standard equipment, according to the workpiece size, different shape, manufacturing daily inspection and measurement.

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