The bolted roller bearing is generally a full complement roller structure, and the raceway part of the bolt shaft is quenched. In order to avoid stress concentration, the outer surface of the thick-walled outer ring of the roller is arc-shaped. The outer ring has two integral ribs, which are guided axially by rollers. The head of the bolt shaft and the press-fitted side retaining ring provide axial support for the outer ring through the rollers. Curved roller bearings are suitable for heavier radial loads. Since the outer ring is guided axially by rollers, the bearing can also withstand heavier axial loads, allowing relatively high-speed operation. However, since it is a full complement of rollers, it is necessary to add grease frequently. Lubricant can be added through the holes on both ends of the mandrel and the mandrel body. Bolted roller bearings are generally passive driven. Bolted roller bearings are generally of full complement roller structure. The bolt shaft raceway is quenched. In order to avoid stress concentration, the outer surface of the thick-walled outer ring of the roller is arc-shaped. The outer ring has two integral ribs, which are guided axially by rollers. The head of the bolt shaft and the press-fitted side retaining ring provide axial support for the outer ring through the rollers. Classification of Bolted Roller Bearings 1) The basic type NUKR series bolt shaft type curve roller NUKR series is a full complement double row cylindrical roller structure. 2) Eccentric sleeve NUKRE series bolt shaft type curved roller NUKRE series and NUKR series are similar to the full complement double row cylindrical roller structure, the only difference is that the NUKRE series has an eccentric sleeve on the bolt shaft. 3) Double raceway PWKR series bolt shaft type curved rollers PWKR series are similar to NUKR series, both of which are full complement double row cylindrical roller structure, the only difference is that the outer ring of PWKR has double raceways, and the two rows of rollers are separated . 4) NUKRA series with side rollers NUKRA series and NUKR series are similar in appearance. The difference is that NUKRA is a stud bolt, and a side roller is added at the end of the bolt shaft, which leads to a change in structure. NUKRA is a single row full complement cylindrical roller structure. This structure is pioneered by Wuxi Wald Bearings and is applying for a patent. 5) KR series KR series curved roller bearings are needle roller cage assembly bearings. The outer ring is axially guided by the ribs on the bolts and the retaining rings fixed on the bolts, which can bear heavier loads and medium speeds. Since there is more grease storage space inside the bearing, the lubrication cycle has to be extended. KR is similar to NUKR, the difference is that KR has retaining rings at both ends, while NUKR has retaining rings only at one end. 6) KRV series KRV series curved roller bearings are full complement needle roller bearings. The outer ring is guided axially by the ribs on the bolts and the retaining rings fixed on the bolts. It can bear heavier loads but lower speed, but Grease must be added frequently. KRV is similar to NUKR, the difference is that KRV has retaining rings at both ends, while NUKR only has retaining rings at one end.
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