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HXB series needle roller bearing is small in size, and of high loading capacity. Please refer to attached form for structure model. Besides, English system series and various kinds of non-standard needle roller bearings are available. If it is necessary, please require for details. SeriesNoteNKneedle roller bearing without inner ring, light seriesNKSneedle roller bearing without inner ring; heavy seriesRNA49needle roller bearing without inner ring; size series: 49RNA69needle roller bearing without inner ring; size series:69; dual bearing race (single bearing race : RNA6906RNA48needle roller bearing without inner ring; size series: 48NKIneedle roller bearing with inner ring; light seriesNKISneedle roller bearing with inner ring; heavy seriesNA49needle roller bearing with inner ring; size series: 49NA69needle roller bearing with inner ring; size series: 69; dual race (single bearing race: NA6906NA48needle roller bearing with inner ring; size series: 48RNA49..RSneedle roller bearing without inner ring; one-sided sealing; size series: 49RAN49..2RSneedle roller bearing without inner ring; double-faced sealing; size series: 49NA49..RSneedle roller bearing with inner ring; single sealing; size series: 49NA49..2RSneedle roller bearing with inner ring; double-faced sealing; size series: 49RNAOneedle roller bearing without inner ring and capped edgeNAOneedle roller bearing with inner ring but without capped edgeRNAV40full complement needle roller bearing without inner ringNAV40full complement needle roller bearing with inner ringNote: series of RNA6906 and NA6906 are treated as single race. And it is required to indicate when in order. HXB series needle roller bearing without inner ring Considering from technology, the needle roller bearing without inner ring is perfect if the bearing race of shaft could endure quenching and grinding. While the bigger shaft diameter is available to needle roller bearing with inner ring. And the comparable rotating precision is available for there is no necessary to consider the dimensional tolerance of inner ring. The cage assembly of strong steel property could lead needle roller parallel with axial line. The diameter tolerance of needle roller is 3μm or 2μm in one needle roller bearing. The complete bearing is composed of exterior ring with capped edge, needle roller and cage assembly. Before assembling, the diameter of inscribed circle of needle roller bearing without inner ring is under dimensional tolerance grade F6. When all needle roller contacts with exterior bearing race, there is no clearance, and it is defined as inscribed circle. To bearing of high-precision requirements, the needle roller bearing without inner ring (HXB series) could reduce dimensional tolerance of inscribed circle to upper part or lower part of dimensional belt of F6 Needle roller bearing with inner ring The needle roller bearing with inner ring is necessary when shaft could not be used as bearing race. The inner ring or outer ring with needle roller or cage assembly units could be assembled individually. Needle roller bearing of sealed ring with or without inner ring Single sided or double-faced sealing HXB series needle roller could avoid soil. The sealing ring is of butadiene acrylonitrile rubber. Its working temperature scope is between minus 30 and 180. Lubricant is No.2 or No.3 high-performance lithium based grease. The longer re-lubricating interval period exists for enough storing lubricant grease space. The inner ring is 1mm thicker than the exterior ring, so sealing ring could work even when shaft moves down. There is lubricant aperture in inner ring in common. Standard bearing The bearings of standard grade are all proved up to dimensional precision and geometric accuracy of standard size. On exterior ring, there are lubricate hole and lubrication groove. Dimensional tolerance To bearing of high-precision requirements, it is required to inform the precision grade. To needle roller bearing with or without inner ring, whose radial clearance is flexible, it is also suitable. Specific requirements Please note supplementary code of bearing code when orders exterior ring of arc shape; so does order exterior ring with lubricate hole. The bearing ring of grinding function is necessary with the purpose to get high-precision bearing device. Then the interior ring grinded after being assembled so as to improve rotating precision. The supplementary code is VGS.. Our company through the authentication of ISO/TS16949