self aligning ball bearings

A self-aligning bearing is recommended when the alignment of the shaft and housing is difficult or when the shaft may bend during operation. Brda notes that similar to deep groove ball bearings, most self-aligning ball are for general use.

Self-aligning ball bearings have two rows of balls, a common sphered raceway in the outer ring and two deep uninterrupted raceway grooves in the inner ring. They are available open or sealed. The bearings are insensitive to angular misalignment of the shaft relative to the housing (fig. 1), which can be caused, for example, by shaft deflection.

Bearing Number	Bore Dia	Outer DIa	Width	Size
40 mm x 80 mm x 18 mm SKF 1208ETN9 self aligning ball bearings	Normal Duty	Setscrew Ball Bearing	208 Series	Ductile Iron
30 mm x 72 mm x 27 mm ISO 2306K self aligning ball bearings	Normal Duty	Setscrew Ball Bearing	206 Series	Cast Iron
50 mm x 90 mm x 20 mm KOYO 1210 self aligning ball bearings	Normal Duty	Setscrew Ball Bearing	210 Series	Stainless Steel
ISB TSF 50 BB self aligning ball bearings	Normal Duty	Setscrew Ball Bearing	215 Series	Cast Iron
105 mm x 225 mm x 49 mm NACHI 1321 self aligning ball bearings	Normal Duty	Setscrew Ball Bearing	206 Series	Cast Iron
80 mm x 170 mm x 58 mm NSK 2316 self aligning ball bearings	Normal Duty	Setscrew Ball Bearing	208 Series	Cast Iron
25,000 mm x 52,000 mm x 15,000 mm SNR 1205 self aligning ball bearings	Medium Duty	Setscrew Ball Bearing	211 Series	Cast Iron
50 mm x 120 mm x 29 mm ISB 1311 KTN9+H311 self aligning ball bearings	Normal Duty	Grip Tight Ball Bearing	210 Series	Cast Iron
35 mm x 72 mm x 23 mm SKF 2207E-2RS1TN9 self aligning ball bearings	Normal Duty	D-Lock Ball Bearing	205 Series	Cast Iron
30 mm x 62 mm x 16 mm ISO 1206 self aligning ball bearings	Normal Duty	Setscrew Ball Bearing	212 Series	Cast Iron
35 mm x 80 mm x 21 mm NACHI 1307 self aligning ball bearings	Normal Duty	Grip Tight Ball Bearing	205 Series	Alloy
17 mm x 40 mm x 12 mm NACHI 1203 self aligning ball bearings	Normal Duty	Setscrew Ball Bearing	205 Series	Cast Iron