Class 4 long cylindrical roller bearings

Needle roller bearings and cylindrical roller bearings long rolling cylinders are its length and diameter Dw Lw ratio (Lw / Dw) is greater than 3, the difference is a long cylindrical roller bearing roller diameter greater than 5 mm, while the needle roller bearings of diameter less than 5 mm.
  The basic structure of needle roller bearings by a pair of rings, a set of needle, of which the outer wall and a hole with a guide.
  Needle roller bearings because the structure is compact, small radial size, load capacity, suitable for radial contour component restricted size. The bearings are generally only bear radial load, can not withstand axial load. Its lower speed limit.
  Long cylindrical roller Cylindrical roller bearing of the basic structure consists of one pair of rings, a group cage, a cylindrical roller head, is suitable for radial dimensions restricted, speed is not high part, can only bear radial load. The outer ring is not allowed when installing a tilt axis and the axis of the inner ring.   rocking motion, and often contained negative, the hoist is not easy to form a liquid lubricants in boundary lubrication conditions, long-term use without refueling and maintenance, refueling during the life of the bearing can be more more prolonged, currently applicable to metallurgical machinery, mining machinery, irrigation machinery, auto parts, construction machinery, agricultural machinery.
2, oil-free self-lubricating bearings: This product is a steel substrate, an intermediate layer sintered spherical bronze powder, surface rolling polytetrafluoroethylene [ptfe], and a mixture of lead and steel. It has a low coefficient of friction, wear and corrosion resistance. Oilless lubrication and long life characteristics, using it can reduce costs, reduce noise and prevent sticky, slippery. It is widely used in various mechanical sliding parts such as printing presses, textile machines, pallet trucks, tobacco machines, pharmaceutical machinery, fitness, micro-motors, automobiles, motorcycles and so on.