The smoothness of a stainless steel glass wheel lies primarily in the choice of materials for the wheel body and bracket, as well as the type and design of the bearings. Here are the key considerations:
1. Materials: The bracket is often made of 304 or 316 stainless steel. These materials contain a specific ratio of chromium and nickel, making them corrosion-resistant and structurally robust. They can withstand long-term salt spray testing without rusting, preventing bracket deformation from affecting wheel slippage. The wheel body commonly uses POM (polyoxymethylene) material, which is high-density, rigid, self-lubricating, wear-resistant, and easily recovers its shape after repeated impacts, reducing friction with the track. Models with a nano-lubricating coating further reduce sliding resistance.
2. Bearings: High-end products often use deep groove ball bearings from brands such as NSK in Japan. These bearings have small tolerances and are suitable for high-frequency sliding scenarios. Some single wheels have double bearings built in, which not only allows for up to 300,000 rotations, but also improves load-bearing capacity and stability. For humid environments, stainless steel needle roller bearings are used. They have small radial clearances and rely on roller rolling to replace sliding friction. They also have low resistance under heavy loads and require virtually no maintenance after using long-life grease. In addition, bearings with 2RS contact seals can prevent dust and water from entering, preventing impurities from affecting smoothness and extending service life.