Shandong SDBALLS Industry Co., LTD was established based on the Shengdian Steel ball Factory. With more than 30 years of production experience, it is a professional steel ball manufacturer in China. SDBALLS has been one of the leading Chinese companies in producing, selling, and distributing carbon steel balls, stainless steel balls, bearing balls, and hunting shots.
About Company
SHANDONG SDBALLS INDUSTRY CORP LTD.
World Leadership With High Precision Ball Products
SDBALL is located in Shandong, China, with easy access to the port due to its proximity to major highway intersections. Now has two factories covering an area of 8,000 square meters, with more than 200 sets of modern and efficient production equipment, and the annual production of steel balls is more than 5,000 tons. The products are 100% exported and sold in more than 50 countries. They are all proven to be world brands Made in China at the most competitive prices and high quality.
The main products are carbon steel balls, stainless steel balls, chrome steel balls, hunting balls, and grinding balls, ranging from 0.5mm to 150mm, including metric and imperial sizes, standard sizes, and extra large and small sizes. Suitable for hardware, bearings, wheels, bicycles, toys, chemicals, military, and other industrial fields. Our customized service projects provide customers with the market demand for the most cost-effective products. We are now the leading manufacturer of grade 100 to 2000 semi-precision balls in China. It is also a reliable long-term supplier to some of the world's best-known companies.
As an ISO9002:2000 certified company, we have strict quality control throughout every manufacturing stage. We adhere to the "professional quality, preferential price, integrity service" business policy, which will prove that we are your best choice! Our goal is to become a well-known brand and comprehensive service provider in the world steel ball industry and to provide high-quality and qualified balls made in China for the world.
SHANDONG SDBALLS INDUSTRY CORP LTD.
Our Manufacturing
Raw Material,wire drawing:
The wire rod is drawn to the required size, in closer tolerances, so it can be used in cold forging.
Cold forging:
Ball blanks are cold or hot-headed from rolls of wire rods or bars, depending on their size and the material. The heading machine cuts off a short cylinder whose length depends on the size of the balls. Then a moving die with a concave spherical cup feeds the cylinder into a matching cup in a fixed die and makes it the spherical shape.
Flashing:
The rolling between plates with concentric grooves eliminates the heading witness marks and increases the precision of the ball. In this operation, the spheres are ground between two concentric pressure plates to correct the spherical 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.
The balls are hardened, if required, by heating them to a high temperature in an atmospherically controlled furnace and then quenching them into a liquid bath. They are then tempered to reduce their brittleness by heating them to a low temperature.
Descaling:
This step removes the residues and by-products from the preceding process.
Hard Grinding:
Here the hardened balls are ground to improve surface finish and geometrical parameters. Several careful grinding processes with ceramic wheels lead to a higher size precision in preparing the balls for the next final lapping operation.
Lapping:
The hardened ground balls are rolled between two cast iron plates. One plate is fixed while the other is rotated at a shallow speed. The real secret of the extreme quality of precision balls happens here. At this stage, the spherical and size are established and carefully inspected by ABMA customer requirements.
Polishing / Finishing:
The final production operation is polishing which adds shiny luster to the finished ball. Proprietary chemical and mechanical processes give the balls their final micro-smoothed finish, increasing wear resistance and product longevity.
Inspecting:
The balls are then inspected visually and mechanically inspected.
SHANDONG SDBALLS INDUSTRY CORP LTD.
Our Manufacturing Gallery Photo
Shandong SDBALLS Industry Co., LTD is established on the basis of Shengdian Steel ball Factory. With more than 30 years of production experience.
