SKFLow-Cross-Section Spherical Roller Bearing 65x140x33 mm, Tapered Bore 1:12, Two Stamped Steel Cages – Fits a 60 mm Shaft With an H 313 Adapter Sleeve

Product Description

What this part is

SKF 21313 EK, a double-row spherical roller bearing from the 213 low-cross-section series, 65 mm bore by 140 mm outside diameter by 33 mm width, with a 1:12 tapered bore. Brand: SKF. Bearing Type: Double-row spherical roller bearing, low cross section. Bore: 65 mm, tapered 1:12. Outside Diameter: 140 mm. Overall Width: 33 mm. Series: 213. Base Number: 21313. Internal Clearance: CN, normal. Closure Type: Open. Cage Type: Two stamped steel cages with a guide ring. Cage Material: Steel. Rolling Elements: Spherical barrel rollers. Number Of Rows: Two. Bearing Material: Bearing steel. Maximum Permissible Misalignment: 2°. Precision Class: Normal, ABEC 1 / P0. Design Units: Metric. Harmonization Code: 8482.30.0040. GTIN: 7316577742261.

The 213 series is the low-cross-section spherical roller design, with a slimmer ring section than a 222 or 223 series bearing of the same bore. It suits a dimensionally constrained housing that still has to carry heavy radial load and accommodate misalignment.

Published ratings

Dynamic Load Rating: 236 kN. Static Load Rating: 270 kN. Fatigue Limit Load Cu: 29 kN. Reference Speed: 4,300 rpm. Limiting Speed: 6,000 rpm. Item Weight: 2.55 kg. Operating Temperature Range: -30 °C to 200 °C. A static rating above the dynamic rating is normal for roller bearings. The straight-bore 21313 E carries a 243 kN dynamic rating against the same 270 kN static rating, so the two dynamic figures are distinct.

Bore and shaft size

Bearing Bore: 65 mm, tapered 1:12. Shaft Diameter: 60 mm, the plain shaft the assembly fits through an SKF H 313 or H 313 E adapter sleeve. Searching by shaft size gives 60 mm; searching by bearing bore gives 65 mm.

Decoding the designation

213: extra-heavy spherical roller dimension series, low cross section. 13: bore code, 65 mm. E: SKF’s optimised high-capacity internal design. K: tapered bore, 1:12. Legacy SKF forms in the same family are C, a flangeless inner ring with a guide ring and two stamped steel cages, and CC, the same with improved internal geometry. Current designations in this envelope: 21313 E, 21313 EK, 21313 E/C3, 21313 EK/C3. Searchable variants of the marked number: 21313-CK, 21313CK, 21313 CK, 21313 EK, 21313EK, 21313 C K, 21313K, 21313.

What a tapered bore buys

A tapered bore mounts on a matching 1:12 taper, in practice an adapter sleeve that clamps to a plain shaft with a nut and lockwasher. The drive-up distance along the taper controls how much internal clearance is left in the bearing, so running clearance is set during assembly rather than by shaft machining tolerance. On a worn or field-repaired shaft that is a real advantage, and the bearing comes off and goes back on without a press.

Interchange guidance

The 21313 base number and the 65 x 140 x 33 mm envelope are ISO standard, so tapered-bore equivalents exist across makers: FAG 21313-E1-XL-K, NSK 21313EAKE4, NTN 21313D1K, with W33 or D1 codes where an outer-ring lubrication groove is wanted. Internal design codes are maker-specific: SKF E, FAG E1-XL, NSK EA and NTN EA each denote that company’s own roller complement, cage and ratings. The straight-bore 21313 E shares the envelope, carries a 243 kN dynamic rating and mounts differently. Related SKF components: the H 313 or H 313 E adapter sleeve, with a lock nut and lockwasher.