1218K Series

Self-Aligning Ball Bearings

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Grouped product items
Parts Number
1218K Self-Aligning Ball Bearings			Add to Compare You can use this service by registering as a member.
1218KC3 Self-Aligning Ball Bearings			Add to Compare You can use this service by registering as a member.

Product Information

Display units Metric Imperial

Designations

1218K

Boundary Dimensions

d	90	mm	Bore diameter
D	160	mm	Outside diameter
B	30	mm	Width
r (min.)	2	mm	Chamfer dimension

Basic Load Ratings

C_r	63000	N	Basic dynamic load rating
C_0r	23500	N	Basic static load rating

Speeds

Grease	3600	min^-1	Grease lubrication
Oil (Oil-bath)	4300	min^-1	Oil-bath lubrication

Abutment and Fillet Dimensions

da (min.)	99	mm	Diameter of shaft abutment
Da (max.)	151	mm	Diameter of housing abutment
ra (max.)	2	mm	Radius of shaft or housing fillet

Calculation factors

e	0.17	Constant
Y2	5.8	Axial load Factors
Y3	3.8	Axial load Factors
Y0	3.9	Axial load Factors

Mass

(approx.)

2.5

Associated products

Adapter

H218X

Adapter

Drawing for Reference

Designations	Boundary Dimensions			Basic Load Ratings		Radial Internal Clearance			Tolerance Class	Limiting Speeds		Mass
Designations	d (mm)	D (mm)	B (mm)	C_r (N)	C_0r (N)		min	max	Tolerance Class	Grease (min^-1)	Oil (Oil-bath) (min^-1)	(approx.) (kg)
1218K	90	160	30	63000	23500					3600	4300	2.5

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Not to scale.
(*) The chamfer dimensions are minimum values.
Suffix K represents bearings with tapered bores (taper 1:12).

CAD

FAQs (3)

Customer Questions

How do self-aligning ball bearings differ from spherical (self-aligning) roller bearings?

Self-aligning ball bearings suit light loads with high-speed rotation, while spherical roller bearings suit heavy loads with low-speed rotation.

What greases are recommended for self-aligning ball bearings?

The recommended grease for self-aligning ball bearings depends on usage conditions.

You can use the selection criteria for finding suitable grease for deep groove ball bearings with self-aligning ball bearings as well.

Can I use self-aligning ball bearings with thrust loads?

Because they have small contact angles, self-aligning ball bearings have extremely limited capacity for thrust loads.

Please consider using thrust bearings with aligning seats if thrust loads are expected.

More Information

More Information
NSK Product Type2	SABB_SA
NSK Product Type	Bearing
Designations	1218K