SNR21307VDouble-Row Spherical Roller Bearing, 35 x 80 x 21 mm, Straight Bore, CN Internal Clearance, Narrow 213 Section, 1 Pc

Product Description

What this part is

SNR 21307V double-row spherical roller bearing. Manufacturer Part Number: 21307.V. Bearing Type: Spherical Roller Bearing. Series: 21300. Number Of Rows: 2. Rolling Elements: Spherical Roller. Bore: 35 mm. Outside Diameter: 80 mm. Overall Width: 21 mm. Bore Type: Straight. Closure Type: Open. Item Weight: 0.53 kg (1.17 lb). Unit Quantity: 1 Pc.

Decoding the designation

213 is the ISO dimension series that puts a large outside diameter on a narrow width, and 07 is the bore code for 35 mm. V is the SNR conventional design generation, with symmetrical rollers and no central rib on the inner ring. SNR codes internal clearance in the J series, J20 for C2, J30 for C3 and J40 for C4, and this designation carries none of them, so the clearance is normal, CN. Searchable forms of the part number: 21307V, 21307-V, 21307 V, 21307CJ, 21307-CJ, 21307CCJ, 21307.

What these specs mean in practice

Internal Clearance: CN. Precision Class: P0, ABEC 1. Cage Material: Pressed Steel. Cage Type: Pressed. Bearing Material: Chrome bearing steel. Operating Temperature Range: -30 to +200 °C. Two rows of spherical rollers run on a single concave outer raceway, so the inner ring, rollers and cage swivel bodily inside the outer ring. That gives heavy radial capacity, thrust capacity in both axial directions, and tolerance of shaft deflection and of housings that are not exactly in line. The 213 section takes its capacity from outside diameter rather than from width: 80 mm across on a 35 mm bore in 21 mm of width, which is what makes it the family that fits an existing casting where a 222-series bearing is too wide. CN clearance suits a position running close to ambient on standard shaft and housing fits.

Bore form

Bore Type: Straight cylindrical, mounting directly on a cylindrical shaft seat. The 1:12 and 1:30 tapered-bore forms of the same envelope are the K and K30 executions and carry those letters in the designation.

Quantity and configuration

Unit Quantity: 1 Pc. One complete, non-separable bearing: outer ring, both roller rows, cages and inner ring, open on both faces. Lubricant: grease or oil.

Interchange guidance

The 35 x 80 x 21 mm spherical roller envelope is a standard seat, so SKF 21307 E, SKF 21307 CC, FAG 21307-E1-TVPB, NSK 21307CDE4, NSK 21307EAE4 and NTN 21307D1 all fit it. The 21307-CJ and 21307-CCJ forms carried in this listing are the same bearing written in SKF-style nomenclature. A C3 or C4 21307 is the same envelope at a different clearance class. Current manufacturer: NTN-SNR. Harmonization Code: 84823000. Design Units: Metric.