single lip oil seal
Oil seals are generally constructed from materials that can withstand the specific chemical properties of the lubricant they are sealing. Common materials include rubber, silicone, and various elastomers. The design of an oil seal often incorporates a lip that rolls against a shaft or surface, creating a dynamic seal that can accommodate movement while maintaining its sealing capabilities.
dust seal vs oil seal



In addition to functional benefits, the double needle adds a unique decorative element to sewing projects. The parallel lines of stitching can enhance the visual appeal of seams, adding texture and dimension. Dense decorative stitches are achievable, which can elevate the overall design of garments and home decor items. Many sewists utilize the double needle for topstitching, giving their projects a polished, professional look without complex techniques.
what is the double needle with sewing machine for
