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BREIF INTRODUCTION:
We are professional steel ball producer since 1997.
We supply various steel ball in carbon steel ball , chrome steel ball and SS ball.
1) Material: Carbon steel AISI 1010-1015, high carbon steel AISI1085 and chrome steel AISI 52100.
2) Size: 1/8", 3/16", 5/32", 1/4",5/16", 3/8".7/32"
3) Grade: G1000,G500,G200,G100
4) Hardness: HRC58-63,HRA78-80
5) Packing: Industry packing with carton ,PP woven bags, drum and commercial packing include poly bags, plastic box, steel box for one gross.
COMPANY INFORMATION:
At hengda(HD) steel balls manufacturing research, develop and continually test our steel balls to be confident we not only deliver the high quality steel balls, but the most effevtive service as well.
Engaged in steel balls area since1997, HD steel balls manufacturing focus on carbon steel balls, stainless steel balls, high chrome steel balls,bearing steel balls .The diameter from 0.5mm to 76.2mm. Their grade of accuracy is G10-G1000. High precision steel balls are mainly used for ball bearing, while semi-precision steel balls (grade100 to 1000) are applied to bicycle/motor cycle parts caster wheels,hardware, draw side, toys, game ball ,wheels, instruments, rail,pumps,polishing, Cosmetics ,the solid smash and so forth.
All the steel balls produced comply with GB/T 3082002 standard,which equivalent to the international standards ISO3290-1998, AFMBA1989 and DIN5401-93.
HD inspect and detect the roundness (Sphericity), Surface Integrity and diameter of steel balls with advanced equipment and consumptive instrumentation.
PRODUCTION PROCESS:
Raw Material,wire drawing:the wire rod is drawn to the required size,in closer tolerances so that it can be used in cold forging.
Cold forgig:Calculated length of wire is sheared and cold forged in a close die to give it the spherical shape.
Flashing: The rolling between plates with concentric grooves in order to eliminate the heading witness marks and to increase the precision of the ball, In this operation the spheres are ground between two concentric pressure plates to correct the sherical shape and remove the seam formed in the cold forging.
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 for the preceding process.
Hard Grinding: Here the hardened balls are ground to improve suface finish and geometrical parameters. Several careful grinding processes with ceramic wheels lead to a higher size precision preparing the balls for the next final lapping operation.
Finishing:Proprietary chemical and mechanical processes give the balls their final micro-smoothed finish, increasing wear resistance and product longevity.
Inspecting: All products pass through at least two 100% inspection stages, using proprietary,automated inspection processes.
PACKAGING & SHIPPING:
Standard Seaworthy Export Packing or packing as customer's requested:
1. Poly bag + Carton + Plywood box
2. Poly bag + Carton + Pallet
3. Poly bag + Woven Bag + Plywood box
4. Poly bag + Woven Bag + Pallet
5. Poly bag + Woven Bag + Steel Drum
Note:Carton: Standard export carton.
Pallet: Wooden or Iron pallet with plastic film against moisture
Special Notes:Materials should be suitable for customer's order.Tolerances should be within the allowable range of the order.
Payment:30% deposit, 70% by T/T before loading or L/C at sight;
A: We are professional factory of steel ball since 1997.
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
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