Central Surplus Bearing Finder
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Double-row spherical roller bearing, 60 x 130 x 31 mm straight bore, open, machined steel cage, CN clearance, 167 kN dynamic and 191 kN static capacity.
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Here are some other options that might fit your project — cross-referenced equivalents and similar parts we have in stock and ready to ship. Need help choosing? Call 585-295-7880.
Spherical Roller Bearing — 60 mm ID, 130 mm OD, 31 mm Width, Straight Bore, C3 Clearance$67.71
Spherical Roller Bearing - Straight Bore, 60 mm ID, 130 mm OD, 31 mm Width, Open, Pressed Steel Cage, CN Clearance, Low Cross-Section 213 Series$65.01
Spherical Roller Bearing - 65 mm ID, 140 mm OD, 33 mm Width, Straight Bore, W33 Lubrication Groove, CN$191.22
Single-Row Barrel Roller Bearing – 60 mm ID, 130 mm OD, 31 mm Width, Self-Aligning, Machined Brass Cage$107.08| MFR / Brand | NTN |
|---|---|
| MPN | 21312 |
| Model | 21312 |
| Bearing Type | Spherical Roller Bearing, Open |
| ID | 60 mm |
| OD | 130 mm |
| Width | 31 mm |
| Material | Bearing Steel |
|---|---|
| Base Number | 21312 |
| Industry Terms | spherical roller bearing, self-aligning roller bearing, double row barrel roller bearing, low cross section spherical roller, 213 series SRB |
| Common Misspellings | 21312 spherical rolller bearing, NTN 2131 2, NTN 21132, sperical roller bearing, NTN 21312 bearring |
| Application Types | Fans and blowers, conveyor pulleys, gearboxes, crushers, vibrating screens, pumps, agitators, paper machinery, mining and aggregate equipment |
| Bore Shaft Size | 60 mm (2.3622 in) |
| Mpn Variants | 21312, 21312 , 213-12, 213 12, NTN21312 |
| Precision Class | JIS-0 / RBEC-1 / ABEC 1 |
| Additional Attributes | Ring modification: plain outer ring, no W33 lubrication groove. Calculation factors e 0.25, Y1 2.69, Y2 4.00, Y0 2.63. Shaft shoulder da min 72 mm, housing shoulder Da max 118 mm, corner radius r 2.1 mm, permissible fillet ras max 2.0 mm. |
| Min Temp | -40°C |
| Cage Type | Machined Steel |
| Dynamic Load Rating | 167 kN |
| Static Load Rating | 191 kN |
| Precision Rating | JIS-0 / RBEC-1 (ABEC 1) |
| Rolling Elements | Spherical Rollers |
| Max Temp | 120°C |
| Item Weight | 2.070 kg (4.564 lb) |
| Cage Material | Steel |
| Number Of Rows | 2 |
| Bore Type | Straight (cylindrical) |
| Snap Ring Included | No snap ring groove |
| Harmonization Code | 8482.30.0000 |
| Design Units | Metric |
| Bearing Material | Through-hardened bearing steel |
| Internal Clearance | CN |
| Part Number | 21312 |
| Limiting Speed | 4300 rpm |
| Cross Reference 1 | SKF 21312 E |
|---|---|
| Cross Reference 2 | FAG 21312-E1 |
| Cross Reference 3 | Koyo 21312R |
| Cross Reference 4 | NSK 21312EAE4 (related size, W33 lubrication groove in the outer ring) |
| Cross Reference 6 | NTN 21312K (related size, 1:12 tapered bore for an H312 adapter sleeve) |
NTN 21312 is a double-row spherical roller bearing in the ISO 213 dimension series, 60 mm bore by 130 mm outside diameter by 31 mm width. The 213 series is the low cross-section spherical roller family — a slimmer section than the 223 or 233 series at the same bore, which suits housings with limited radial envelope.
The leading 213 gives the dimension series and the trailing 12 is the bore code, 12 × 5 = 60 mm. There is no K in the designation, so the bore is straight and cylindrical, mounting directly on the shaft journal. There is no clearance suffix, so radial internal clearance is CN. There is no W33 suffix, so the outer ring is plain, with no lubrication groove and no feed holes.
Two rows of barrel rollers run on a common spherical outer raceway, so the inner ring, rollers and cage assembly swivels within the outer ring and accommodates shaft deflection and housing misalignment. Because both roller rows are inclined, a double-row spherical roller bearing takes axial load in both directions as well as heavy radial load. NTN publishes 167 kN dynamic and 191 kN static basic load ratings for this size.
The 21312 uses a machined steel cage. Limiting speed is 3,400 rpm on grease and 4,400 rpm on oil. Tolerance class is JIS-0, equivalent to RBEC-1 — standard commercial precision. Operating temperature range is −40 to 120 °C.
One bearing, open on both faces, straight bore, machined steel cage, CN clearance. Mass 2.070 kg.
Abutment dimensions from the NTN catalogue: shaft shoulder diameter da 72 mm minimum, housing shoulder diameter Da 118 mm maximum, ring corner radius r 2.1 mm with a permissible fillet ras of 2.0 mm. The straight bore takes an interference fit on the journal directly.
SKF 21312 E and FAG 21312-E1 are the same-envelope 213-series equivalents in their respective schemes; cage execution differs between makers and the published ratings move with it. NTN 21312C3 is the same geometry in a greater-than-normal clearance grade, and 21312K is the 1:12 tapered-bore version for adapter sleeve mounting.
$144.52
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