NEWLONG Sewing Machine Parts
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Tolerances: tight tolerances allow old and new parts to be completely interchangeable, always providing the same level of fit
Hardening: all steel components are hardened to provide high resistance to wear and high durability. Hardness characteristics between steel, mating components are matched to ensure that lubrication criteria are always met.
Coatings: parts are coated to inhibit oxidation (rusting) in some cases, or in other cases, to provide a durable treatment to parts that are exposed to bags and products
Finish: some parts have a very smooth surface. In some cases, this is needed to reduce frictions