A4050/A4138

Inch Design Tapered Roller Bearings

A4050/A4138

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

Grouped product items
Parts Number
A4050/A4138
A4050R/A4138R

Display units Metric Imperial

A4050/A4138

d	12.7	mm	Bore diameter
D	34.988	mm	Outside diameter
T	10.998	mm	Total width
B	10.988	mm	Width of inner ring
C	8.73	mm	Width of outer ring
Cup r (min.)	1.3	mm	Chamfer dimension of outer ring (Cup)
Cone r (min.)	1.3	mm	Chamfer dimension of inner ring (Cone)

Cr	14400	N	Basic dynamic load rating
C0r	10900	N	Basic static load rating

Grease	12000	min-1	Grease lubrication
Oil (Oil-bath)	16000	min-1	Oil-bath lubrication

8.2

Effective load center

da	18.5	mm	Diameter of shaft abutment
Da	29	mm	Diameter of housing abutment
db	17	mm	Diameter of shaft abutment
Db	32	mm	Diameter of housing abutment
ra (max.)	1.3	mm	Radius of shaft or housing fillet of inner ring
ra (max.)	1.3	mm	Radius of shaft or housing fillet of outer ring

Mass approx.	0.033	kg	Mass approx.(Cone)
Mass approx.	0.022	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