1221

Self-Aligning Ball Bearings

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Parts Number
1221 Self-Aligning Ball Bearings			Add to Compare You can use this service by registering as a member.

Display units Metric Imperial

1221

C_r	82500	N	Basic dynamic load rating
C_0r	32500	N	Basic static load rating

Grease	3000	min^-1	Grease lubrication
Oil (Oil-bath)	3600	min^-1	Oil-bath lubrication

da (min.)	116	mm	Diameter of shaft abutment
Da (max.)	179	mm	Diameter of housing abutment
ra (max.)	2	mm	Radius of shaft or housing fillet

(approx.)

4.4

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)
1221	105	190	36	82500	32500				ISO NORMAL CLASS	3000	3600	4.4

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

CAD

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.