Structural form of high-precision needle roller bearings

The layout mode of high-precision needle roller bearings can only be better selected by inquiring about products. There are several different layout modes of high-precision roller bearings. We can choose more suitable bearings according to different layouts. 1. Needle roller bearing with drawn outer ring: drawn outer ring bearing is a kind of needle roller bearing with perforated type and sealed type. The drawn outer ring needle roller bearing has no inner ring, and the needle roller directly touches the surface of the shaft. . Therefore, the machining accuracy and heat treatment hardness of the shaft should be similar to the inner ring of the bearing. The drawn cup needle roller bearing with the connecting frame is suitable for high speed and heavy load, and is mostly used in the gearbox of machine tools, cars, motorcycles or textile machinery. Stamped ferrule needle roller bearings without a cage, due to the full needle rollers, are suitable for swaying working conditions under heavy loads. Such as the frame of the aircraft, the shaft end of the main wing of the missile, etc. 2. Entity ferrule needle roller bearings: Entity ferrule needle roller bearings, commonly used solid ferrule needle roller bearings are NA type and RNA type. Entity ferrule needle roller bearings are mostly used in machine tools and car gearboxes. Its advantages are that the radial section standard is small and the radial load it carries is large. Standard-type solid ferrule needle roller bearings have a connecting frame, so the speed is high, and it can meet the requirements of machine tools and car gearboxes. 3. Combined needle roller bearing: Combined needle roller bearing is a combination of solid ferrule needle roller bearing, ball bearing and roller bearing. 4. Needle roller and connecting frame assembly: Needle roller and connecting frame assembly are actually needle roller bearings without ferrules, which are mostly used for large and small ends of connecting rods of gearboxes, motorcycles and cars. Since the temperature in the cylinder rises, the bearing must be resistant to high temperature. At present, the domestically-manufactured couplings and needle roller bearings are all in the dust, so try to choose a manufacturer with a wide range when selecting. For example, Reschberg has its own patented technology, and the quality can be comparable to the first-line level in the United States.

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