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Welcome to Hubei provincial national resources imp.& exp.corp. we would be glad to welcome your enquries and will give you very fast feedback.
1.Advantage Of Company:
1.We are one of the leading manufacturer in steel ball industry in China.
2.We have professional sales team which takes in charge of international trading business by ourselves.
3.we are doing for the cooperation with customers which are from different countries, if you have any questions, please tell us,
| Grade | Diameter availale(Dw) | Basic diameter tolerance | Batch diameter variation(Vdwl) | Allowable ball diameter variation(Vdws) | Deviation from spherical from Sph | Surface roughness(Ra) |
| 10 | 1.588-25.4mm | +/-2.5 | 0.5 | 0.25 | 0.25 | 0.025 |
| 16 | 1.588-25.4mm | +/-2.5 | 0.8 | 0.4 | 0.4 | 0.025 |
| 24 | 1.588-25.4mm | +/-2.5 | 1.2 | 0.6 | 0.6 | 0.05 |
| 48 | 1.588-25.4mm | +/-5 | 2.4 | 1.2 | 1.2 | 0.08 |
| 60 | 1.588-25.4mm | +/-10 | 3 | 1.5 | 1.5 | 0.10 |
| 100 | 1.588-25.4mm | +/-12.5 | 5 | 2.5 | 2.5 | 0.125 |
| 200 | 1.588-25.4mm | +/-25 | 10 | 5 | 5 | 0.2 |
| 500 | 1.588-25.4mm | +/-50 | 25 | 13 | 13 | - |
| 1000 | 1.588-25.4mm | +/-125 | 50 | 25 | 25 | - |









A: It is 30 days if the goods are not in stock, it is according to quantity.
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
1. Customer OEM or ODM is available;
2. Welcome for factory visiting for direct discussing;
3. FOB Guangzhou / Shanghai / Qingdao or CFR / CIF are available;
4. Good quality, favorable price and strong service backup;
5. Certificate of Origin / Form-E / Form-A available for customs clearance;
6. Professional consulting is available from Mr. Z. Y. Ding – Factory Director;
a) Tel: +86-27-8578 0609 b) www.HNRchina.cn
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