MPNbase

340 mm bore bearings

43 models with a 340 mm (13.386 in) bore across 6 bearing types, outside diameters from 420 to 710 mm. Tables are grouped by type; open a model for full specs and equivalents.

43 models 420–710 mm OD range 2 brands

CARB Toroidal Roller Bearings (5)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
C3068-KM C3000 340 520 133 SKF open CN 2900
C3068-M C3000 340 520 133 SKF open CN 2900
C3168-KM C3100 340 580 190 SKF open CN 4900
C3168-M C3100 340 580 190 SKF open CN 4900
C4168-K30MB C4100 340 580 243 SKF open CN 5600

Cylindrical Roller Bearings (16)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NCF1868-V NCF1800 340 420 38 SKF open CN 446
NNC4868-CV NNC4800 340 420 80 SKF open CN 913
NNCF4868-CV NNCF4800 340 420 80 SKF open CN 913
NNCL4868-CV NNCL4800 340 420 80 SKF open CN 913
NU1968-ECMA NU1900 340 460 56 SKF open CN 682
NCF2968-V NCF2900 340 460 72 SKF open CN 1190
NJ2968-ECMA NJ2900 340 460 72 SKF open CN 1020
NNC4968-CV NNC4900 340 460 118 SKF open CN 1790
NNCF4968-CV NNCF4900 340 460 118 SKF open CN 1790
NNCL4968-CV NNCL4900 340 460 118 SKF open CN 1790
NCF3068-CV NCF3000 340 520 133 SKF open CN 2380
NU3068-MA NU3000 340 520 133 SKF open CN 2200
NNCF5068-CV NNCF5000 340 520 243 SKF open CN 4400
NU3168-ECMA NU3100 340 580 190 SKF open CN 3470
NU2268-MA NU2200 340 620 165 SKF open CN 2640
NU2368-ECMA NU2300 340 710 212 SKF open CN 5610

Deep Groove Ball Bearings (8)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
61868 61800 340 420 38 SKF open CN 178
61868-MA 61800 340 420 38 SKF open CN 178
61968 61900 340 460 56 NTN open CN 325
61968-MA 61900 340 460 56 SKF open CN 281
16068 16000 340 520 57 NTN open CN 380
16068-MA 16000 340 520 57 SKF open CN 345
6068 6000 340 520 82 NTN open CN 465
6068-M 6000 340 520 82 SKF open CN 423

Needle Roller Bearings (1)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
NA4868 NA-48 340 420 80 SKF open CN 616

Spherical Roller Bearings (10)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
23968 23900 340 460 90 SKF open CN 1490
23968-CCK-W33 23900 340 460 90 SKF open CN 1490
24068 24000 340 520 180 SKF open CN 3621
24068-CCK30-W33 24000 340 520 180 SKF open CN 3621
23168 23100 340 580 190 SKF open CN 4445
23168-CCK-W33 23100 340 580 190 SKF open CN 4445
24168 24100 340 580 243 SKF open CN 5487
24168-ECCK30J-W33 24100 340 580 243 SKF open CN 5487
23268 23200 340 620 224 SKF open CN 5362
23268-CAK-W33 23200 340 620 224 SKF open CN 5362

Spherical Roller Thrust Bearings (3)

Model Series d (mm) D (mm) B (mm) Brand Seal Clearance C (kN)
29268 29200 340 460 73 SKF open CN 1130
29368 29300 340 540 122 SKF open CN 2710
29468-E 29400 340 620 170 SKF open CN 6700

Exact-dimension interchange groups at 340 mm bore

These d×D×B envelopes at a 340 mm bore are shared by several series or brands — the starting point for a dimensional cross reference:

Selecting a 340 mm bore bearing

The bore fixes the shaft, not the bearing capacity. At 340 mm the catalog spans 420–710 mm outside diameter: the light sections suit compact housings and moderate duty, while the larger ODs use bigger rolling elements and carry substantially more load. Select first by the required dynamic load rating C for the calculated L10 life, then by available radial space.

For a rotating inner ring a m6 shaft seat with an H7 housing is the usual starting point; an interference fit plus thermal growth consumes internal clearance, so C3 is the common industrial default rather than CN. Sealed variants (-2RS, -ZZ) trade a small amount of speed for contamination protection and maintenance-free operation — compare the sealed and open versions of the same envelope before substituting one for the other.

Frequently asked questions

What bearings have a 340 mm bore?

This index lists 43 verified bearing models with a 340 mm (13.386 in) bore across 6 bearing types, from 420 to 710 mm outside diameter. Open any model for the full specification table, seal/clearance options and graded cross references.

How do I choose between the 420–710 mm OD options for a 340 mm shaft?

On a fixed 340 mm bore, a smaller outside diameter means a lighter section for limited housing space and moderate load; a larger OD with a wider ring carries more radial and axial load and lasts longer at the same duty. Compare the C dynamic load rating in each model table, then match seal type, internal clearance (CN/C3/C4) and precision class to the actual mounting and operating temperature.

What shaft fit and bore code apply to 340 mm bearings?

A 340 mm bore on a rotating inner ring normally uses a m6 shaft seat with an H7 housing bore (verify against the catalogue for heavy or stationary-ring duty). In the ISO designation system 340 mm is bore code 68 (code × 5), so a 62-series bearing with this bore is the 6268.