Gearmotors: What They Are and How to Size a Replacement
Many industrial loads need torque an electric motor can’t deliver on its own, at a
Availability:
3 in stock
Koyo 21308RFY spherical roller bearing, 40 x 90 x 23 mm, 213 series, R design with machined brass cage, straight bore, CN clearance, 1 piece.
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$49.58

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| MFR / Brand | Koyo |
|---|---|
| MPN | 21308RFY |
| Model | 21308RFY |
| Bearing Type | Spherical Roller Bearing, Open |
| ID | 40 mm |
| OD | 90 mm |
| Width | 23 mm |
| Series | 21300 |
|---|---|
| Rolling Elements | Spherical Roller |
| Cage Material | Machined brass |
| Number Of Rows | 2 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.30.00.40 |
| Internal Clearance | CN |
| Overall Width | 23 mm |
| Mpn Variants | 21308RFY, 21308-R-FY, 21308 R FY, 21308MB |
| Compatible With Replaces | Current Koyo design for this size: 21308RZ |
| Additional Attributes | Chamfer r min: 1.5 mm; Koyo R design: centre rib and ribs on both sides, brass cage |
| Industry Terms | spherical roller bearing; self-aligning roller bearing; double row spherical roller bearing; brass cage spherical roller; 40x90x23 bearing |
| Common Misspellings | Koyo 21308 RFY; KOYO21308RFY; Koyo 21308R FY; Koiyo 21308RFY; JTEKT Koyo 21308RFY |
| Application Types | Industrial gearboxes; conveyors; pumps and fans; heavy radial load shafts with misalignment |
| Closure Type | Open |
| Cross Reference 1 | SKF 21308 E - E design, higher ratings |
|---|---|
| Cross Reference 2 | FAG 21308-E1 - E design, higher ratings |
Koyo 21308RFY double-row spherical roller bearing, 213 series, 40 x 90 x 23 mm, with a machined brass cage and straight bore. Unit Quantity: 1 Pc.
21308 — spherical roller bearing, dimension series 13, bore code 08 = 40 mm.
R — Koyo R internal design: centre rib and ribs on both sides of the inner ring, brass cage.
FY — machined brass cage.
Bore Diameter: 40 mm. Outside Diameter: 90 mm. Overall Width: 23 mm. Rolling Elements: Spherical Roller. Number Of Rows: 2. Cage Material: Machined brass. Internal Clearance: CN. Closure Type: Open. Bore Type: Straight. Series: 21300. Unit Quantity: 1 Pc.
Chamfer r min: 1.5 mm. The self-aligning outer raceway accepts shaft deflection and housing misalignment under heavy radial load.
Cross-Reference 1: SKF 21308 E (E design, higher load ratings). Cross-Reference 2: FAG 21308-E1 (E design, higher load ratings). The brass-cage marking 21308MB denotes this bearing. Current Koyo production of this size is the 21308RZ design.
40 mm bore, 90 mm outside diameter and 23 mm width, with a straight bore.
R is Koyo’s design with a centre rib and ribs on both sides of the inner ring; FY is a machined brass cage.
Normal (CN) internal clearance and a machined brass cage.
$144.52
4 in stock
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Our team can locate, cross-reference, and source all parts.
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