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The factory process behind metal lunch boxes often involved a series of intricate steps. First, the raw materials were sourced and cut into the appropriate sizes. Next, the metal sheets underwent printing, where vibrant colors were applied to create eye-catching designs. The pieces were then shaped, bent, and fused together, creating a sturdy construction that could withstand the rigors of daily use. Finally, a protective coating was applied to guard against rust, ensuring these lunch boxes would endure for years.
metal lunch boxes vintage factory

The 6000 Series Z bearing is a deep groove ball bearing with a single metal shield on one side. This design helps protect the bearing from dirt and debris while still allowing for easy access for lubrication. The 6000 in the bearing's name refers to the size and type of the bearing, while the Z indicates the presence of a shield.
In addition to standard deep groove ball bearings, the catalogue may also include specialized bearings with features such as shields or seals for improved protection against contaminants and moisture

single row deep groove ball bearing catalogue. These bearings are designed to operate in challenging environments and provide optimal performance and reliability.

single row deep groove ball bearing catalogue. These bearings are designed to operate in challenging environments and provide optimal performance and reliability.