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Index >> Machined needle roller bearing >> Inner ring ,without ubrication hole
d 20-33mm
Product Parameter
Designation Mass m
≈kg 		Principal dimensions
mm 		Raceway F tolerance
μm
d F B r
min 		Upper limit Lower limit
IR30X35X30 58.5 30 35 30 0.3 +5 -4
IR30X37X18 50 30 37 18 0.6 +5 -4
IR30X37X22 61.6 30 37 22 0.6 +5 -4
IR32X37X20 42 32 37 20 0.3 0 -9
IR32x37X30 62 32 37 30 0.3 0 -9
IR32X40X20 68 32 40 20 0.6 0 -9
IR32X40X36 124 32 40 36 0.6 0 -9
IR33X37X13 21.9 33 37 13 0.3 0 -9
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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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