INA bearing internal information, novices must read. Be sure to favorite. Roughly look at what kind of method it is: look at the fourth last digit of the old code name from the last, that is, which kind it belongs to. Type 0 deep groove ball bearings (single row): 68, 69, 60, 62, 63, 64, etc. at the beginning , there are also those starting with 1000 (cages are generally made of stamped steel plates) Class 1 self-aligning ball bearings (double row): 12, 13, 22, 23 at the beginning (also called self-centering ball bearings) (4 digits, with Type 2 cylindrical roller bearings (with K) (single and double row): NU10, NJ2, N3, NF3, NN, etc. at the beginning (the cage is stamped steel plate type, and machining can also be used) Type 3 spherical roller bearings ( Double row): 230, 222, 223 etc. beginning (5 digits) 4 types of needle roller bearings (long cylindrical roller bearings): NA48, NA49, NA69 etc. beginning NAV4007, RNAV4003, NA4904A, RNA4900ANAV=407 RNAV=408(hundreds plus one) NA=454 NA****A=452 RNA****A=462RNA=464 RNA****X2A=624 NKIB=596 NKIA=597 NA6=6254 RAN6=63545 type of spiral roller bearings: This type is not commonly used 6 types of angular contact ball bearings (single and double row): 70, 72, 73, 74 (single row has three contact angles 15°25°40°) 7 types of tapered roller bearings (single and double row ): 320, 322, 323, etc. (with taper K) (the cage uses stamped steel plate type) 8 types of thrust ball bearings (plane seat thrust ball bearings) (3 sets, 5 sets): 511, 512, 513 and other beginnings (5 digits) Thrust roller bearings: 292, 293, 294 and other beginnings of the upper shaft ring and lower seat ring (the cage uses stamped steel plate type) Thrust angular contact ball bearings: Class 9 29340 (new code)-- -9039340 (old code) QJ, UC205, UC308 thrust cylindrical roller bearings, thrust spherical roller bearings, thrust needle roller bearings, thrust tapered roller bearings. Marking sequence of steel balls: nominal diameter/grade (G+number)/ball gauge value (sign + number) or symbol b unit miu m/ball gauge value (sign + number in parentheses) unit miu m/ The standard number or the standard number plus the supplementary technical condition number. Nuts (AN, HN, HNL), lock washers (AW), adapter sleeves (AL), push-off sleeves (AH, AHX) Note:] UB --- Outer spherical bearing with top screw UE --- With eccentric sleeve Spherical Bearing UC----spherical bearing with top wire UEL---spherical bearing with eccentric sleeve UCP---spherical bearing with vertical seat top wire UELP---spherical bearing with eccentric sleeve with vertical seat UCFU---outer spherical bearing joint bearing with square seat top wire: old code U4, UC10, UG4, GE6C, GE10D, GE4E, GE8DS, GE60ES... Overall eccentric bearing: no new code Supercharger bearing: no new and old code Linear motion ball bearing: LB6A---ZX61219-A Special bearing for forklift: CC2004237-2Z---849044, RZ=oil seal Z, 2Z dustproof cover is steel RS, 2RS waterproof cover is rubber open type (no With cover) -Z --- There is a dust cover on one side of the bearing (non-sealed) -2Z -- There is a Z dust cover on both sides of the bearing Steel plate ZZ type dust cover NR --- The outer ring of the bearing has a stop groove and Stop ring. N---The outer ring of the bearing has a stop groove and no stop ring. -R---The outer ring of the bearing has a stop baffle -RS---A ball bearing with a rubber seal on one side, and the seal is usually composed of a rubber-filled fiber ring and a steel plate washer. (RS type are all rubber seals) -RS1---A bearing with a rubber seal on one side, the seal is composed of a vulcanized rubber ring and a steel plate washer. -RS2---Bearing with rubber seal on one side, the seal is composed of fluorinated rubber ring and steel plate washer. -RZ---Bearing with bottom friction seal on one side, the seal is composed of vulcanized rubber and steel ring. -2RZ---Bearings with RZ seals on both sides -2RS---Bearings with RS seals on both sides -2RS1---Bearings with RS1 seals on both sides -2RS2---Bearings with SR2 seals on both sides-RSZ ---The bearing has a skeleton rubber sealing ring (contact type) on one side and a dust cover on the other side. -RZZ---58FAG bearing has a skeleton rubber sealing ring (non-contact type) on one side and a dust cover on one side. -FS---Felt ring seal on one side of the bearing -2FS---Felt ring seal on both sides of the bearing U---Thrust ball bearing with spherical washer -ZN---Z+N; dust cover with stop groove On the opposite side (the bearing has a dust cover on one side and a stop groove on the outer ring on the other side) -ZNR---Z+NR; the dust cover is on the opposite side of the stop groove and the stop ring. -ZNB---Z+N; the dust cover is on the same side as the stop groove. -ZNBR---Z+NR; the dust cover is on the same side as the stop groove and the stop ring. 1: How to look at the category of the old code: the fourth digit from the right of the bearing, for example, 3282109 is category 2. 2: NN3021 with K is 328 2120, without K is 318 2120; that is, with K is 328, without K is 31
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