Technical Requirements series bearing

Classification Summary Rolling classification of rolling bearings: Rolling bearing load bearing structure type classification said contact angle is divided into different radial bearings are mainly used to bear radial load Rolling nominal contact angle nominal contact angle divided into radial contact bearings nominal contact angle heart to heart contact bearings bearing nominal contact angle greater than radial bearings thrust bearings are mainly used to bear axial load Rolling nominal 2002: Machine. 1. By 320 & 329 series bearing structural type classification (1) can bear the load bearing their direction or nominal contact angle, divided into: a) radial bearings ----- mainly used to bear radial load bearing, nominal contact angle from 0 to 45. Press nominal contact angle is different, is divided into: radial contact bearings ----- nominal contact angle is zero radial bearings: Radial angular contact bearings ----- nominal contact angle greater than radial bearings 0-45 of . 2) thrust bearing ----- mainly used for axial load bearing, the nominal contact angle greater than 45-90. Press nominal contact angle is divided into different: Axial contact bearings ----- nominal contact angle of 90 thrust bearings: Axial angular contact bearings ----- nominal contact angle greater than 45 but less than 90 of the thrust bearing. (2) the type of rolling element bearing according divided into: 1) rolling the ball as the ball bearing -----: 2) series bearing the roller bearings for the rollers -----. Roller Bearing press roller type, is divided into: NNCF series bearing cylindrical roller bearings ----- rolling body is cylindrical roller bearings, cylindrical roller ratio of length to diameter of less than or equal to 3; needle roller bearings --- - rolling body is needle bearings, needle length to diameter ratio greater than 3, but a diameter less than or equal to 5mm; tapered roller bearings ----- rolling body is tapered roller bearings; spherical Roller bearings eleven rolling body is spherical roller bearings. (3) whether the bearing aligning their work is divided into: 1) aligning bearings ----- raceway is spherical shape, able to adapt to angular deviation and angular movement between the two raceways of the bearing axis ; 2) non-aligning bearing (rigid bearing) ----- able impedance path between roller bearing axis angular offset. (4) according to the number of rows of rolling elements bearings, divided into: 1) single row bearings ----- has a list of rolling element bearings; 2) ----- double row bearings have two rows of rolling element bearings; 3) ----- multi-row bearings with more than two rolling element bearings, such as three, four bearings. (5) whether the separation bearing their part, are divided into: 1) separable bearings ----- bearings with separable components; 2) can not be separated after the final bearing ----- bearing supporting rings are freedom can not be arbitrarily separated bearings. (6) bearing their structure and shape (if no filling slots, without inner and outer rings and structural shapes, ribs, and even whether the cage, etc.) Crossed-roller-bearing can also be divided into a variety of structural types. 2. rolling bearing outside diameter size classification bearing their size, divided into: (1) series bearing ---- nominal diameter size range of 26mm or less bearing; (2) a small nominal outer bearing ----- diameter size range of 28-55mm bearings; (3) small and medium sized bearings ----- nominal diameter size range of 60-115mm bearings; (4) in the large bearing ----- nominal diameter size range of 120-190mm bearing (5) large bearing ----- nominal diameter size range of 200-430mm bearings; (6) large bearings ----- nominal diameter size range of 440mm or more bearings. Rolling numerous types and sizes, in order to facilitate the design and selection, standard specifies the code represented by the rolling bearing type, size, structure, characteristics and tolerance level and so on. (Alternative GB272-88), Rolling Code constitutes as shown in the table. Rolling Code code representation purposes: to characterize the structure of the rolling bearing, size, type, slim bearings precision, code constitutes: Front code - said bearing subassembly basic code - said after bearing types and sizes, such as the main feature set code - indicates the accuracy of the material bearing the characteristics of diameter code: ID Code × 5 = internal diameter special case: d = 10 12 15 17 code is: 00010203 size series Code: used to express the same outside diameter and width of the inner diameter but different bearings, see right. OD Series Code: special light (0,1), light (2), middle (3), weight (4) Width Series Code: normal width to "0", usually not marked. But for tapered roller bearings (3 classes) and spherical roller bearings (class 2) can not omit the "0".