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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
IR60X70X25 195 60 70 25 1 -10 -21
IR60X70X28 215 60 70 28 1.1 -10 -21
IR65X72X25 141 65 72 25 1 -10 -21
IR65X72X45 259 65 72 45 1 -10 -21
IR65X73X25 164 65 73 25 1 -10 -21
IR65X73X35 231 65 73 35 1 -10 -21
IR65X75X28 229 65 75 28 1.1 -10 -21
IR70X80x25 221 70 80 25 1 -10 -26
IR70X80X30 267 70 80 30 1 -10 -26
IR70X80X35 312 70 80 35 1 -10 -26
IR70X80X54 488 70 80 54 1 -10 -26
IR75X85X25 238 75 85 25 1 -4 -17
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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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