[Thông báo] Lịch Nghỉ Tết Nguyên Đán 2026. Xem chi tiết
Announcement of Lunar New Year Holiday 2026. See more
[Thông báo] Thay Đổi Về Thủ Tục Hải Quan Và Giao Nhận Hàng Hoá Theo Thông Tư 121/2025/TT-BTC. Xem chi tiết .
[Notice] Change to Customs Procedures and Cargo Delivery under Circular 121/2025/TT-BTC. See more .
Lubrication-free bushings/washers are bearing components that don't require lubricating oil. Since bearings usually receive a lot of frictional resistance that generates heat, lubricants such as oil or grease are used to prevent the seizing or abnormal wear that this frictional heat could otherwise cause. Lubrication-free bushings don't need lubricating oil because the bearing body has a lubricating structure made possible by lubricating oil in the bearing body, or by embedded solid lubricant or the like. Lubrication-free washers are washers that can receive thrust loads, and have the same lubricating structure as lubrication-free bushings. They are usually used together with lubrication-free bushings. Lubrication-free bushings and washers are both highly effective under conditions where using lubricants is difficult due to the operating environment or structure. They also greatly reduce maintenance costs by eliminating the need for regular lubrication, and enabling stable operation over long periods.