Product Description
What this part is
NTN 21320 single-row spherical roller bearing, 213 series, straight bore. Bore Diameter: 100 mm. Outside Diameter: 215 mm. Width: 47 mm. Internal Clearance: CN.
Decoding the designation
213 — NTN spherical roller series 213: single-row, medium-heavy section.
20 — bore code, 100 mm.
No clearance suffix — normal (CN) radial internal clearance.
What these specs mean in practice
Dynamic Load Rating: 370,000 N. Static Load Rating: 465,000 N. Limiting Speed: 2,000 rpm grease; 2,600 rpm oil. Item Weight: 8.74 kg (19.27 lb). Cage Type: Machined. Precision Class: RBEC 1 / P0. Operating Temperature: -40 °C to 120 °C. The single row of barrel-shaped rollers carries heavy radial load while the spherical outer raceway lets the bearing self-align under shaft deflection. Calculation factors: e 0.22; Y1 3.01; Y2 4.48; Y0 2.94.
Mounting data
Shaft abutment da min: 114 mm. Housing abutment Da max: 201 mm. Fillet r: 2.5 mm; ras max: 2.5 mm.
Interchange guidance
Same envelope, 213-series spherical roller: SKF 21320 E, FAG 21320-E1-XL, Timken 21320EJW33.