HR31305J Series

Metric Series Tapered Roller Bearings

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Grouped product items
Parts Number
HR31305J Metric Series Tapered Roller Bearings			Add to Compare You can use this service by registering as a member.
HR31305JP5 Metric Series Tapered Roller Bearings			Add to Compare You can use this service by registering as a member.
HR31305JP6 Metric Series Tapered Roller Bearings			Add to Compare You can use this service by registering as a member.

Product Information

Display units Metric Imperial

Designations

HR31305J

Dimension series

ISO

7FB

ISO355 dimension series approx.

Boundary Dimensions

d	25	mm	Bore diameter
D	62	mm	Outside diameter
T	18.25	mm	Total width
B	17	mm	Width of inner ring
C	13	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)

Basic Load Ratings

C_r	47000	N	Basic dynamic load rating
C_0r	40500	N	Basic static load rating

Speeds

Grease	5600	min^-1	Grease lubrication
Oil (Oil-bath)	8000	min^-1	Oil-bath lubrication

Dimensions

19.9

Effective load center

Abutment and Fillet Dimensions

da (min.)	39	mm	Diameter of shaft abutment
Db (min.)	59	mm	Diameter of housing abutment
Da (min.)	47	mm	Diameter of housing abutment
Da (max.)	53	mm	Diameter of housing abutment
Sa	3	mm	Minimum width of space required in housing on large side face
Sb	5	mm	Minimum width of space required in housing on small side face
db (max.)	33	mm	Diameter of shaft 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

Calculation factors

e	0.83	Constant
Y0	0.4	Axial load Factors
Y1	0.73	Axial load Factors

Mass

(approx.)

0.265

Drawing for Reference

Designations	Boundary Dimensions					Basic Load Ratings		Tolerance Class	Limiting Speeds		Mass
Designations	d (mm)	D (mm)	T (mm)	B (mm)	C (mm)	C_r (N)	C_0r (N)	Tolerance Class	Grease (min^-1)	Oil (Oil-bath) (min^-1)	(approx.) (kg)
HR31305J	25	62	18.25	17	13	47000	40500		5600	8000	0.265

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Not to scale.
(*) The chamfer dimensions are minimum values.
Suffix C represents medium-angle tapered roller bearings. Since they are designed for specific applications, please consult NSK when using bearings with suffix C.
The bore diameter "no-go side" tolerances (High) specified in this drawing do not necessarily apply within a distance from the ring face to 1.2 times the chamfer dimension r (max).
Some of these tolerances conform to NSK standards.

CAD

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NSK Product Type2	TRBSR_MD
NSK Product Type	Bearing
Designations	HR31305J