12580/12520

Inch Design Tapered Roller Bearings

12580/12520

Images shown are representations. Designs and specifications may differ from actual products.

Parts Number
12580R/12520R

Display units Metric Imperial

12580R/12520R

d	20.638	mm	Bore diameter
D	49.225	mm	Outside diameter
T	19.845	mm	Total width
B	19.845	mm	Width of inner ring
C	15.875	mm	Width of outer ring
Cup r (min.)	1.5	mm	Chamfer dimension of outer ring (Cup)
Cone r (min.)	1.5	mm	Chamfer dimension of inner ring (Cone)

Cr	44000	N	Basic dynamic load rating
C0r	37000	N	Basic static load rating

Grease	8000	min-1	Grease lubrication
Oil (Oil-bath)	11000	min-1	Oil-bath lubrication

12.9

Effective load center

da	28.5	mm	Diameter of shaft abutment
Da	42.5	mm	Diameter of housing abutment
db	26	mm	Diameter of shaft abutment
Db	45.5	mm	Diameter of housing abutment
ra (max.)	1.5	mm	Radius of shaft or housing fillet of inner ring
ra (max.)	1.5	mm	Radius of shaft or housing fillet of outer ring

Mass approx.	0.114	kg	Mass approx.(Cone)
Mass approx.	0.067	kg	Mass approx.(Cup)

CAD

Customer Questions

How are angular contact ball bearings (ACBBs) different from tapered roller bearings (TRBs)?

TRBs provide higher load capacity and rigidity than ACBBs. However, ACBBs can offer rotation at higher speeds than TRBs.

More Information
NSK Product Type2	TRBSR_ID
NSK Product Type	Bearing