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7903A5

Standard Series High Precision Angular Contact Ball Bearings

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Parts Number
7903A5TRSUMP4 Standard Series High Precision Angular Contact Ball Bearings			Add to Compare You can use this service by registering as a member.

Product Information

Parts Number

7903A5TRSUMP4

Boundary Dimensions

d	17	mm	Bore diameter
D	30	mm	Outside diameter
B	7	mm	Width
r(min.)	0.3	mm	Chamfer Dimension
r1(min.)	0.15	mm	Chamfer Dimension

Basic Load Ratings

C_r	6.00	kN	Basic Dynamic Load Rating
C_0r	2.80	kN	Basic Static Load Rating

Speeds

Grease	42600	min^-1	Limiting Speed
Oil (Oil-air)	63900	min^-1	Limiting Speed

Dimensions

	A5: 25°		Contact Angle
a	9.0	mm	Effective Load Center

Abutment and Fillet Dimensions

da(min.)	19.5	mm	Diameter of Shaft Abutment
Da(max.)	27.5	mm	Diameter of Housing Abutment
Db(max.)	28.8	mm	Diameter of Housing Abutment
ra(max.)	0.3	mm	Radius of Shaft or Housing Fillet
rb(max.)	0.15	mm	Radius of Shaft or Housing Fillet

Performance

Pa

2.21

kN

Permissible Axial Load

Preload,Rigidity(DB and DF arrangement)

	Preload	Axial Rigidity	Measured axial clearance
EL	15N	34N/μm	1μm
L	35N	47N/μm	-1μm
M	77N	63N/μm	-4μm
H	149N	82N/μm	-8μm

Additional information

0.12

g/brg

Recommended Grease Quantities

Mass

0.017

kg

Mass(approx.)

Drawing for Reference

Designations	Basic Load Ratings		Axial Internal Clearance			Accuracy	Limiting Speeds		Mass
Designations	C_r	C_0r		min	max	Accuracy	Grease (min^-1)	Oil (Oil-air) (min^-1)	(kg)
7903A5TRSUMP4	6.00	2.80				P4: ISO Class 4	42600	63900	0.017

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CAD

Customer Questions

More Information

More Information
NSK Product Type2	SP_ACBB_ST_A5
NSK Product Type	Super Precision Bearing
Designations	7903A5

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