A Member of the Schaeffler Group >

Due to their excellent technical characteristics such as high radial load carrying capacity together with their suitability for high speeds, single and double row INA machined needle roller bearings have been used with outstanding success for decades in numerous different applications. With the X-life generation of these needle roller bearings, the performance capacity of the products up to 120mm outside diameter has once more been significantly increased. > The use of state of the art manufacturing technologies has resulted in a better, more uniform surface over the whole contact face between...

Needle roller bearings with ribs >

Needle roller bearings are single or double row units comprising machined outer rings with ribs, needle roller and cage assemblies and removable inner rings. > Bearings without inner rings have particularly compact radial dimensions. However, they require a shaft raceway that is hardened and ground. The bearings are available in open and sealed versions, Figure 1 and Figure 2 .Bearings of type RNA69 are double row units if F > w 40mm. > Bearings of type RNA49..-RSR are fitted on one side and bearings of type RNA49..-2RSR on both sides with contact seals, Figure 2 . They are greased with a lithium...

Needle roller bearings with inner ring are used if the shaft cannot be configured as a rolling bearing raceway. The bearings are available in open and sealed versions, Figure 3 and Figure 4 .Bearings of type NA69 are double row units if d 32mm. > Bearings of type NA49..-RSR are fitted on one side and bearings of type NA49..-2RSR on both sides with contact seals, Figure 4 . They are greased with a lithium complex soap grease to DIN51825KP2N֖20 and can be lubricated.For lubrication, the bearings have a lubrication groove and lubrication hole in the outer ring, with the exception of: NKI with d...

Shaft diameter Shaft tolerance Roughness Roundness Parallelism Nominal dimension mm Operating clearance max. max. max. > over incl. Small Normal Large > 65 k5 h5 g6 R > a 0,1 (R 25% of diameter tolerance 50% of diameter tolerance 65 80 k5 h5 f6 > z 0,4) Suffix Description Design 80 120 k5 g5 f6 R 0,15 (R C3 Radial internal clearance larger than normal Special design > 1) a z 0,63) P5 High dimensional and geometrical tolerances Special design > 1) 120 160 k5 g5 f6 R > a 0,2 (R RSR Contact seal on one side Standard 160 180 k5 g5 e6 > z 1) TN > 2) Cage made from glass fibre reinforced polyamide...

The limiting speeds n > G for seriesRNA49..-RSR(2RSR) and NA49..-RSR(2RSR) are valid for grease lubrication. > Sealing rings of seriesG, GR and SD are matched to the bearing dimensions and can be combined with wider inner rings of seriesIR. The outer surface of the inner rings can be used as the sliding surface for seal lips.Sealing rings: see INApublicationGSDӔ. > Needle roller bearings with inner ring are radially located by means of a close fit on the shaft and in the housing. > 153 079b Figure 5 Axial location by snap rings ז NKI > In order to prevent lateral creep of the bearing rings, they...

Needle roller bearings without ribs >

Needle roller bearings are single or double row units comprising machined outer rings without ribs, needle roller and cage assemblies and removable inner rings.The bearings are not self-retaining. This means that the outer ring, needle roller and cage assembly and inner ring can be fitted independently of each other. > Needle roller bearings without ribs are unsealed and are not supplied greased.Double row bearings can be lubricated via a lubrication groove and lubrication hole in the outer ring. > 103 196c Figure 1 Single row bearingsRNAO..-XL Bearings of typeRNAO have particularly compact radial...

Bearings of typeNAO are used if the shaft cannot be configured as a rolling bearing raceway, Figure 3 .The needle roller and cage assembly can be fitted either together with the outer ring or with the inner ring. It can also be subsequently slid between the outer ring and inner ring.Bearings with a lubrication hole in the inner ring have the suffixIS1.The double row design is indicated by the suffixZW, the lubrication hole and lubrication groove are indicated by the suffixASR1, Figure 4 . > The standard inner ring allows axial displacement within the values sӔ stated in the dimension tables.Where...

ASR1 > 2) Lubrication hole and lubrication groove in outer ring Shaft diameter Shaft tolerance Roughness Roundness Parallelism CN Normal radial internal clearance IS1 > 2) Lubrication hole in inner ring Nominal dimension mm Operating clearance max. max. max. TN > 1)2) Cage made from glass fibre reinforced polyamide66 XL Bearings in X-life design ZW > 2) Double row over incl. Small Normal Large Ԗ 65 k5 h5 g6 R > a 0,1 (R 25% of diameter tolerance 50% of diameter tolerance > 1) Bearings with plastic cage: see dimension tables. 65 80 k5 h5 f6 > z 0,4) > 2) Dependent on size. 80 120 k5 g5 f6 R >...

Bore Radial internal clearance >

Aligning needle roller bearings >

Aligning needle roller bearings are units comprising drawn outer cups, plastic support rings with a concave inner profile, outer rings with a spherical outside surface, needle roller and cage assemblies and removable inner rings.The bearings can compensate static misalignments and can thus tolerate misalignment of the shaft relative to the housing; see Compensation of misalignmentӔ, page39.Aligning needle roller bearings are firmly seated in the housing bore. The bore can therefore be produced easily and economically. > Aligning needle roller bearings without ribs are unsealed and are not supplied...

Housing material Shaft tolerance for bearings without inner ring Bore tolerance Suffix Description XL Bearings in X-life design Steel or cast iron N6 h6 > Surface quality Raceway for bearings without inner ring Housing bore Roughness max. R > a 0,1 (R > z 0,4) R > a 0,8 (R > z 4) Roundness max. 25% of h6 IT 5/2 Parallelism max. 50% of h6 IT 5/2 >