Yes, we can, but it depends on the specific requirements. If the customer only requires a bright surface finish, we use a polishing process by default, which is highly efficient and cost-effective. If the customer also requires high dimensional accuracy and straightness (for example, for hydraulic piston rods or precision shafts), polishing often falls short, and grinding is necessary. Grinding is performed on a centerless grinding machine, which ensures both diameter tolerance and straightness requirements are met.

We deliver in 1-meter lengths by default. In addition to standard lengths, we can also customize any length according to your requirements. It should be noted that the maximum achievable length varies significantly depending on the rod diameter: small diameters (Φ ≤ 20 mm) can reach 6–8 meters; medium diameters (Φ 20–60 mm) are typically 4–6 meters; and large diameters (Φ ≥ 60 mm) generally do not exceed 4 meters. To ensure your application requirements are met, please provide specific diameter and length specifications when placing an order.

This depends on the delivery condition. If the customer orders bright-finished round bars, we measure the outer diameter at multiple cross-sections using an outside micrometer after peeling and polishing to ensure roundness meets ASTM or customer drawing requirements. There are no roundness requirements for black-finished round bars, as they are only semi-finished products. Customers will machine them after receipt, and the roundness of the finished product is guaranteed by the machine tools. Therefore, the surface quality and dimensional accuracy of black round bars are relatively less stringent, and their price is significantly lower.

Polishing refers to the mechanical grinding of the round bar’s surface using abrasives (such as grinding wheels or sanding belts) to achieve a bright, smooth finish. This process is particularly suitable for hot-rolled round bars, as their surfaces are often covered with a layer of scale that is difficult to remove. Polishing can thoroughly remove this scale and reveal the metal’s natural color. In contrast, during the manufacturing of cold-drawn rods, the inner walls of the die exert a polishing and hardening effect on the bar material. As a result, the bars naturally emerge from the die with a bright, fine-grained surface that requires no additional polishing.