NSKTL23034CAG3MKC4Double Row Spherical Roller Bearing — 1:12 Tapered Bore, 170 mm ID, 260 mm OD, 67 mm Width, Open, Machined Brass Cage, C4 Internal Clearance

Product Description

What this part is

NSK TL23034CAG3MKC4, a double-row spherical roller bearing with a tapered bore. Bore: 170 mm. Outside diameter: 260 mm. Width: 67 mm. Series: 23000. Internal clearance: C4. Country of origin as recorded: Japan.

Decoding the designation

TL: NSK’s long-life execution. 23034: the ISO 230 dimension series at bore code 34. CA: the high-capacity design execution, with a machined cage and a roller-guiding pocket geometry that controls roller skew. G3M: an NSK execution and lubrication code. K: tapered bore, taper 1:12. C4: internal radial clearance class, wider than normal.

Bore form and mounting

The bore is tapered at 1:12, so this bearing mounts on an adapter sleeve rather than directly on a plain shaft. The matching NSK sleeve is the H3034, which seats on a 150 mm shaft diameter and is secured with a KM34 locknut and an MB34 lockwasher. Driving the bearing further up the taper closes the internal clearance, which is how running clearance is set at assembly. That is why a C4 class is specified: the wider starting clearance gives room for the drive-up to consume.

Ratings and speed

Basic dynamic load rating Cr: 835 kN. Basic static load rating C0r: 1,270 kN. Limiting speed: 2,200 rpm. Maximum permissible misalignment: 1.5°. Mass: 12.9 kg.

What these specs mean in practice

The static rating sits above the dynamic rating, which is normal for a double-row spherical roller: C0r measures permissible raceway deformation under a stationary load while Cr describes fatigue life in rotation, and on a two-row roller of this section the two scale differently. A double-row spherical roller carries thrust in both directions as well as heavy radial load, and its self-aligning raceway absorbs 1.5° of shaft-to-housing misalignment without edge loading. The machined brass cage suits shock loading and high temperature better than a pressed steel cage of the same design.

Quantity and configuration

One bearing, open on both faces.

Interchange guidance

The direct-equivalent designations on a tapered bore with a machined brass cage are SKF 23034 CAK/C4 and FAG 23034-E1-K-M-C4. The SKF 23034 CC/C4 and FAG 23034-E1-M-C4 numbers also carried on this record are related sizes rather than equivalents: the CC execution uses a pressed steel cage, and neither carries the K, so both are straight-bore parts. The searchable forms include TL23034CAG3MKC4, 23034CAG3MKC4, 23034 CAG3M K C4, 23034K and 23034.