FAG2309TV.C3Self-Aligning Ball Bearing 45 x 100 x 36 mm, Double Row, Straight Bore, Polyamide Cage, C3

Product Description

What this part is

A FAG 2309-TV-C3 double-row self-aligning ball bearing, 45 mm bore, 100 mm outside diameter, 36 mm wide. Two rows of balls run on a common spherical outer raceway, so the inner ring, ball complement and cage swivel freely inside the outer ring. That construction gives the bearing genuine self-alignment — it tolerates shaft deflection and housing-bore misalignment without inducing edge load — along with the very low friction characteristic of ball rolling elements.

Decoding the designation

23 is the ISO wide dimension series of the double-row self-aligning ball family and 09 is the bore code, giving 45 mm at five millimetres per unit. TV is the glass-fibre reinforced polyamide cage. C3 is radial internal clearance greater than normal. The absence of a K means a straight cylindrical bore, so the bearing mounts directly on the shaft seat without an adapter sleeve.

What these specs mean in practice

A self-aligning ball bearing has the lowest friction of any rolling bearing type, which makes it the choice on long, unsupported or deflecting shafts where the drive power available is modest. The trade is capacity: the spherical outer raceway means point contact on the outer race, so radial rating is well below a roller bearing in the same envelope and axial capacity is limited. C3 clearance suits an inner ring running hotter than its housing or a tight interference fit that closes working clearance once mounted. The polyamide cage runs quietly, absorbs shock, and has a practical continuous ceiling of 120 °C.

Quantity and configuration

1 Pc. Bearing only, open on both faces, no seals and no shields. No adapter sleeve, locknut or lockwasher, none of which a straight-bore bearing uses.

Fitting notes

The straight bore goes onto a cylindrical shaft seat with an interference fit, pressed or heated against the inner ring face so no mounting force passes through the ball rows. Because the bearing self-aligns, the housing bore does not have to be square to the shaft; the outer ring seat is normally a looser fit than on a rigid bearing so the ring can settle.

Interchange guidance

The ISO base number is 2309, so another maker’s 2309 C3 or 2309 TN9 C3 straight-bore double-row self-aligning ball bearing of the same 36 mm width is a genuine interchange. The 2309-K-TV-C3 is a related size, not a substitution: its 1:12 taper bore requires an H2309 adapter sleeve. The FAG 22309 shares this exact 45 x 100 x 36 envelope but is a spherical roller bearing with barrel rollers, a far higher radial rating and thrust capacity in both directions — a different part, not an alternative.