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Index >> Machined needle roller bearing >> Inner ring ,without ubrication hole
d 35-85mm
Product Parameter
Designation Mass m
≈kg 		Principal dimensions
mm 		Raceway F tolerance
μm
d F B r
min 		Upper limit Lower limit
IR50X58X22 115 50 58 22 0.6 0 -11
IR50X58X40 208 50 58 40 0.6 0 -11
IR50X60X25 162 50 60 25 1 0 -11
IR50X60X28 181 50 60 28 1.1 0 -11
IR55X60X25 85.5 55 60 25 0.6 -10 -21
IR55X60X35 121 55 60 35 0.6 -10 -21
IR55X63X25 141 55 63 25 1 -10 -21
IR55X63X45 256 55 63 45 1 -10 -21
IR55X65X28 198 55 65 28 1.1 -10 -21
IR60X68X25 152 60 68 25 1 -10 -21
IR60X68X35 213 60 68 35 0.6 -10 -21
IR60X68X45 276 60 68 45 1 -10 -21
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Introduction
features the inner ring is made of hardened bearing steel and has a finish machined or ground raceway. application occasions: The shaft cannot be used as bearing raceway. Bearing types include needle roller and cage assembly, open or closed stamped outer ring needle roller bearing and machined needle roller bearing in order to ensure that the shaft can have a large displacement relative to the bearing seat, the needle roller bearing must be paired with the wide inner ring for use lip sealing requires optimization of the running surface. inner ring IR has a finishing raceway. the chamfering of the end face makes the inner ring easy to install into the bearing and prevents damage to the sealing lip. there are two kinds of inner rings with and without lubrication holes. ferrule with lubrication hole, its suffix is is1 . inner race LR has grinding raceway. The end face has been turned and the sharp corners have been removed. the tolerance of this inner ring is larger than that of the type IR . Therefore, they are suitable for applications with large width tolerance and small axial runout requirements. the machining surplus of the special designed inner race (suffix is VGS ) is Z . Its value is related to the raceway diameter, as shown in the table below.
raceway diameter machining allowance diameter of pre grinding raceway
F Z F VGS
mm mm & nbsp;
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