BEST QUALITY OF STAINLESS STEEL BALL WITH LOW PRICE

BEST QUALITY OF STAINLESS STEEL BALL WITH LOW PRICE System 1

BEST QUALITY OF STAINLESS STEEL BALL WITH LOW PRICE

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 1000 pc

Supply Capability:: 600000 pc/month

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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 variation	deviation from spherical	surface soughness	lot diameter variation	nominal ball deviation tolerance
	Vdwa	Sph	Ra	Vdwl	Tdn
not over(um)
G10	0.25	0.25	0.025	0.5	*
G16	0.4	0.4	0.032	0.8	*
G20	0.5	0.5	0.05	1	*
G40	1.0	1.0	0.08	2	*

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.

Q: There is a little trace of polishingShock polishing is even worseElectrolysis can not be uneven, there is a slight bump: German winter three step mirror polishing 2013 new processYou can free proofing!

Q: Why does the precision casting factory not usually make iron castings?: The so-called precision parts is the size, roughness requirements of the piece. Cast iron parts generally do not reach the accuracy.

Q: Why does the surface of stainless steel casting mirror mirror ripple?: Because the grinding machine is layer by layer. And the material inside the casting is not completely uniform.

Q: How do casting parts remove stress?: Annealing treatment, according to different casting annealing treatment, eliminate thermal stress, if need to restore hardness or increase hardness, and then quenching treatment

Q: The cause of fracture and why there is no toughness: This question is too broad, see what the casting casting Oh in order to reduce the wayward cast steel, ductile iron, gray iron and white iron, you can choose the material according to their own requirements.

Q: How to cast iron and wrought iron collocation: So we can only watch and ear distinction: 1, see: Iron fracture is rough, showing a bead (for the sake of coarse grain iron), and wrought iron fracture is generally more smooth; if this is a new fracture, but also to see the dark and shiny born iron wrought iron pig iron is bright; the fracture is generally irregular, because it is very brittle, mostly is interrupted, (which is processed, it is very flat and wrought iron) must not be interrupted, mostly by certain way processed separately, so the fracture is generally neat; if the fracture is that is cutting, wrought iron, iron is not cutting; iron surface will not have pores, familiar iron porosity; if a piece of iron is a significant deformation (bending) that is wrought iron because of poor plasticity It doesn't have to be so deformed, it's really bent, or it's broken, or it's obviously cracked, and it doesn't bend very much. There are some details that can not be made clear. It is necessary to have some experience.

Q: What is the casting material?: Kdl1588n said in detail, casting a lot of material, steel, iron, aluminum, copper, zinc, etc. can be, valuable, as well as gold and silver, the most common on cast steel and cast iron, cast aluminum and so on.

Q: What is the difference between casting and stamping parts?: Separation process is also called blanking, the purpose is to make the stamping parts along a certain contour line from the sheet metal separation, at the same time guarantee the quality requirements of the separation section. Stamping is a highly efficient production methods, the use of compound die, especially the multi station progressive die stamping process can be completed in a multi machine, realized by belt uncoiling, leveling, punching, forming and finishing automatic production. High production efficiency, good working conditions, low production costs, can produce hundreds of parts per minute.

Q: When the blank is a casting, the margin is evenly distributed, how should rough machining?Please help friends from mechanical classes.There is another problem: in the NC milling plane contour machining, when the rough margin is large, how to deal with.Who can help in time, add 20 reward. Urgently!!: Even distribution is a good thing. Generally, the machining allowance of the casting is uneven.If the processing depends on how your processing techniques have been arranged.In the NC milling plane contour machining, when the rough margin is large, how to deal with.1. Return to the foundry, too large margin improvement.2. Then you can spend more time on it.

Q: What's the cause of the choking of the casting?,: 3. when casting the environment is humid, sand mold has not removed the moisture, when the casting, the moisture instantaneous transforms into the steam, causes the blowhole

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