- Product Details
- {{item.text}}
Quick Details
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Model Number:
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12.7 mm
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Application:
-
Bearing
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Surface:
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Polishing Finish
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Grade:
-
G25
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Size:
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12.7 mm
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Name:
-
bearing ball
-
Stocks:
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Rich
-
Package:
-
Industry packing
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Feature:
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Corrosion Resistance
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Hardness:
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HRC 58-62
Quick Details
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Material:
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Stainless steel
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Place of Origin:
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Zhejiang, China
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Brand Name:
-
NTL
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Model Number:
-
12.7 mm
-
Application:
-
Bearing
-
Surface:
-
Polishing Finish
-
Grade:
-
G25
-
Size:
-
12.7 mm
-
Name:
-
bearing ball
-
Stocks:
-
Rich
-
Package:
-
Industry packing
-
Feature:
-
Corrosion Resistance
-
Hardness:
-
HRC 58-62
12.7 mm 304 stainless steel bearing ball
How a Ball is Made
Heading: In the first step, heading machines cut wire into short lengths and form it into spherical shapes between dies.
Deflashing : The flash line, a ridge left by the forming dies, is removed as balls roll between heavy, cast iron plates.
Soft Grinding: Similar to deflashing, except that a grinding stone is used to improve precision.
Heat-treating: Carbon steel balls are next carburized and hardened. Heat treatment imparts the desired hardness and case depth.
Descaling: This step removes the residues and by-products from the heat-treating process.
Hard Grinding: Slow, meticulous grinding assures proper sizing and sphericity, with tolerances as close as ±.0001".
Lapping: Several proprietary lapping processes can bring balls to the requirements of ISO 3290 Grade 10 - 48.
Finishing: Proprietary chemical and mechanical processes give the balls their final micro-smoothed finish, for increased wear resistance and product longevity.
Inspection : All products pass through at least two 100% inspection stages, using proprietary, automated inspection processes
We are the professional manufacturer of steel grinding ball. Our products have been exported to more than 40
countries in the world and all have enjoyed a great reputation. The specification of our products as following:
1.Chemical composition:
|
Item |
C |
Cr |
Si |
Mn |
S |
P |
Cu |
Mo |
Ni |
Hardness |
|
Element |
0.6-1.2% |
≤ 1.0 |
0.15-0.6 |
0.6-1.5 |
≤ 0.04 |
≤0.04 |
≤0.1 |
≤0.25 |
≤0.1 |
55-65 |
2.Specification and Hardness of Grinding Media Ball
Weight and Microstructure of Forged Steel Ball
|
Norminal Diameter |
Diametrical Tolerance(mm) |
Approx Weight of Single Ball(kg) |
Average Number of One MT |
Microstructure |
|
25mm/1'' |
+1.5,-0.5 |
0.064 |
15625 |
M+B+C (M-Martensite;B-Bainitic;C-Carbide) |
|
30mm/1.25'' |
+1.5,-0.5 |
0.11 |
9090 |
|
|
40mm/1.5'' |
+2.0,-1.0 |
0.26 |
3846 |
|
|
50mm/2'' |
+2.0,-1.0 |
0.51 |
1961 |
|
|
60mm/2.5'' |
+3.0,-2.0 |
0.89 |
1124 |
|
|
70mm/2.75'' |
+3.0,-2.0 |
1.4 |
714 |
|
|
80mm/3.25'' |
+3.0,-2.0 |
2.1 |
476 |
|
|
90mm/3.5'' |
+3.0,-2.0 |
3 |
333 |
|
|
100mm/4'' |
+4.0,-3.0 |
4.1 |
244 |
|
|
110mm/4.5'' |
+4.0,-3.0 |
5.47 |
283 |
Industry packing
Carton box+Pallet or as customer's requirement
Production process including raw material cutting, machine processing, grinding, accessories cleaning, assemble, cleaning, stoving, oil coating, cover pressing, testing, package.
2.How to control the products quality?
Combining advanced equipment and strict management, we provide high standard and quality bearings for our customers all over the world.
3. What is the transportation?
If small quantity , we Suggest to send by express, such as DHL,UPS, TNT FEDEX. If large quantity, by sea.
4. Can we design packaging?
Yes. Default is regular packing, and we can make customer's own packing.
5. Can you provide OEM service?
Yes, we work on OEM orders. Which means size, quantity, design, packing solution, etc will depend on your requests; and your logo will be customized on our products.
6. Could you tell me the delivery time of your goods?
3-7 days stock goods and other goods according to the quantity about 3-21 days.
7. Can you give me discount on bearing?
Yes, of course. Pls. send me your Email, you’ll get more
