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2308 bearing dimensions & suffix variants

Look up recorded dimensions for designations beginning with 2308. The table retains complete manufacturer designations so special suffixes and different dimensional variants remain visible.

On this page5 sections

Find by measured dimensions

Enter bore d, outside diameter D and width B. Use decimals or inch fractions such as 1/2 or 1 1/4.

For tapered assemblies use total width T; for units or flanged bearings also check the mounting drawing.

Exact model evidence

2308 dimensions and recorded technical data

The recorded 2308 base designation measures 40×90×33 mm (inside diameter d × outside diameter D × width B). This answer uses unsuffixed records from NSK, KOYO. It does not assign the same dimensions or operating ratings to every suffix.

The numeric series boundary is preserved: a longer number is not included merely because its first digits match. 19 recorded variants are listed. A dash means the value is missing, not zero.

Brand / full designationNamed dimensions (mm / in)Dynamic C (kN)Static C0 (kN)Reference speed (rpm)Limiting speed (rpm)Mass (kg / g)
NSK2308Self-aligning ball bearing
Bore diameter (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Bearing width (B)
33 mm
1.299213 in
50 kN13.5 kN——0.94 kg940 g
KOYO2308Self-aligning ball bearing
Bore diameter (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Width (B)
33 mm
1.299213 in
56.1 kN13.4 kN—6200 rpmLimiting Speeds(Grease Lub.): 6200 min-1Limiting Speeds(Oil Lub.): 8600 min-10.925 kg925 g
SKF2308 E-2RS1KTN9Self-aligning ball bearing with tapered bore and seals on both sides
Bore diameter (d)
58.134 mm
2.28874 in
Outside diameter (D)
90 mm
3.543307 in
Width (B)
33 mm
1.299213 in
33.8 kN11.2 kN13000 rpm4800 rpm0.96 kg960 g
SKF2308 E-2RS1TN9Self-aligning ball bearing with seals on both sides
Bore diameter (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Width (B)
33 mm
1.299213 in
33.8 kN11.2 kN13000 rpm4800 rpm0.916 kg916 g
SKF2308 EKTN9Self-aligning ball bearing with tapered bore
Bore diameter (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Width (B)
33 mm
1.299213 in
54 kN16 kN14000 rpm10000 rpm0.858 kg858 g
SKF2308 EKTN9/C3Self-aligning ball bearing with tapered bore
Recorded bore (d)
40 mm
1.574803 in
Recorded outside dimension (D)
90 mm
3.543307 in
Catalogue width (symbol unverified)
33 mm
1.299213 in
54 kN16 kN14000 rpm10000 rpm0.868 kg868 g
SKF2308 EMSelf-aligning ball bearing
Bore diameter (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Width (B)
33 mm
1.299213 in
54 kN16 kN14000 rpm10000 rpm0.996 kg996 g
SKF2308 EM/C3Self-aligning ball bearing
Recorded bore (d)
40 mm
1.574803 in
Recorded outside dimension (D)
90 mm
3.543307 in
Catalogue width (symbol unverified)
33 mm
1.299213 in
54 kN16 kN14000 rpm10000 rpm0.99 kg990 g
SKF2308 EM/P6Self-aligning ball bearing
Recorded bore (d)
40 mm
1.574803 in
Recorded outside dimension (D)
90 mm
3.543307 in
Catalogue width (symbol unverified)
33 mm
1.299213 in
54 kN16 kN14000 rpm10000 rpm0.99 kg990 g
SKF2308 ETN9Self-aligning ball bearing
Bore diameter (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Width (B)
33 mm
1.299213 in
54 kN16 kN14000 rpm10000 rpm0.88 kg880 g
SKF2308 ETN9/C3Self-aligning ball bearing
Recorded bore (d)
40 mm
1.574803 in
Recorded outside dimension (D)
90 mm
3.543307 in
Catalogue width (symbol unverified)
33 mm
1.299213 in
54 kN16 kN14000 rpm10000 rpm0.884 kg884 g
FAG2308-2RS-TVHSelf-aligning ball bearing
Bore diameter (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Width (B)
33 mm
1.299213 in
30 kN9.7 kN—5100 rpm0.96 kg960 g
FAG2308-K-TVHSelf-aligning ball bearing
Bore diameter (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Width (B)
33 mm
1.299213 in
46 kN13.5 kN8700 rpm7900 rpm0.89 kg890 g
FAG2308-K-TVH-C3Self-aligning ball bearing
Bore diameter (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Width (B)
33 mm
1.299213 in
46 kN13.5 kN8700 rpm7900 rpm0.89 kg890 g
FAG2308-MSelf-aligning ball bearing
Bore diameter (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Width (B)
33 mm
1.299213 in
46 kN13.5 kN8700 rpm11900 rpm1.005 kg1005 g
FAG2308-M-C3Self-aligning ball bearing
Bore diameter (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Width (B)
33 mm
1.299213 in
46 kN13.5 kN8700 rpm11900 rpm1 kg1000 g
FAG2308-TVHSelf-aligning ball bearing
Bore diameter (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Width (B)
33 mm
1.299213 in
46 kN13.5 kN8700 rpm7900 rpm0.913 kg913 g
FAG2308-TVH-C3Self-aligning ball bearing
Bore diameter (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Width (B)
33 mm
1.299213 in
46 kN13.5 kN8700 rpm7900 rpm0.913 kg913 g
NSK2308KSelf-aligning ball bearing
Nominal bore diameter (1:12 taper) (d)
40 mm
1.574803 in
Outside diameter (D)
90 mm
3.543307 in
Bearing width (B)
33 mm
1.299213 in
50 kN13.5 kN———
Compare recorded seals, clearance, precision and materials

Manufacturer wording is retained. A missing property is not inferred from another brand or a similar suffix.

Brand / designationClosureOriginal precisionClearanceCageMaterialLubricant
NSK 2308Not recordedNot recordedNot recordedNot recordedNot recordedNot recorded
KOYO 2308OpenNot recordedNot recordedNot recordedNot recordedNot recorded
SKF 2308 E-2RS1KTN9Seal on both sidesNot recordedCNNon-metallicBearing steelGrease
SKF 2308 E-2RS1TN9Seal on both sidesNot recordedCNNon-metallicBearing steelGrease
SKF 2308 EKTN9WithoutNot recordedCNNon-metallicBearing steelNone
SKF 2308 EKTN9/C3WithoutNot recordedC3Non-metallicBearing steelNone
SKF 2308 EMWithoutNot recordedCNMachined brassBearing steelNone
SKF 2308 EM/C3WithoutNot recordedC3Machined brassBearing steelNone
SKF 2308 EM/P6WithoutNot recordedCNMachined brassBearing steelNone
SKF 2308 ETN9WithoutNot recordedCNNon-metallicBearing steelNone
SKF 2308 ETN9/C3WithoutNot recordedC3Non-metallicBearing steelNone
FAG 2308-2RS-TVH2RS — Contact seal on both sidesPN — Normal (ISO 492:2023)CN (Group N) — Normal internal clearanceTVH — Solid cage made of glass-fiber reinforced polyamide PA66Not recordedGA13 — Ball bearing and insert bearing grease
FAG 2308-K-TVHWithout — Not sealedPN — Normal (ISO 492:2023)CN (Group N) — Normal internal clearanceTVH — Solid cage made of glass-fiber reinforced polyamide PA66Not recordedWithout — Bearing not greased
FAG 2308-K-TVH-C3Without — Not sealedPN — Normal (ISO 492:2023)C3 (Group 3) — Internal clearance larger than CNTVH — Solid cage made of glass-fiber reinforced polyamide PA66Not recordedWithout — Bearing not greased
FAG 2308-MWithout — Not sealedPN — Normal (ISO 492:2023)CN (Group N) — Normal internal clearanceM — Solid brass cage, ball guidedNot recordedWithout — Bearing not greased
FAG 2308-M-C3Without — Not sealedPN — Normal (ISO 492:2023)C3 (Group 3) — Internal clearance larger than CNM — Solid brass cage, ball guidedNot recordedWithout — Bearing not greased
FAG 2308-TVHWithout — Not sealedPN — Normal (ISO 492:2023)CN (Group N) — Normal internal clearanceTVH — Solid cage made of glass-fiber reinforced polyamide PA66Not recordedWithout — Bearing not greased
FAG 2308-TVH-C3Without — Not sealedPN — Normal (ISO 492:2023)C3 (Group 3) — Internal clearance larger than CNTVH — Solid cage made of glass-fiber reinforced polyamide PA66Not recordedWithout — Bearing not greased
NSK 2308KNot recordedNot recordedNot recordedNot recordedNot recordedNot recorded

How to compare these values

  • Use the displayed dimension names and original symbols. Housing length L, height H2 and flange width are not bearing outside diameter D. A catalogue width with an unverified symbol must not be assumed to be inner-ring width B or assembly width T. Open the product record for mounting dimensions and geometry.
  • Inch values are calculated from the recorded millimetres using 25.4 mm per inch, rounded to six decimal places. They do not change a metric bearing into an inch-series bearing. Gram values are converted from the recorded mass in kilograms.
  • C and C0 describe different rating conditions. They are not a single safe working-load limit and cannot replace an application load calculation.
  • Reference and limiting speeds are separate catalogue values. The source grease/oil context is shown where recorded. Lubricant, seals, loads, fit, clearance and cooling affect the usable operating speed.
  • A common base number does not prove equivalent seals, clearance, precision, material or interchangeability. Open the full designation for these fields.
Check load calculations →Estimate rating life →Decode the complete marking →Check replacement evidence →

Related prefix matches — other model numbers may appear

These discovery results can contain a longer number or a different component. They are not specifications for the requested exact model. Open the complete product to inspect its original geometry.

KOYO

2308

Self-aligning ball bearing

View full technical record →NSK

2308

Self-aligning ball bearing

View full technical record →SKF

230/800 CAK/C3W33

Spherical roller bearing with tapered bore and relubrication features

View full technical record →SKF

230/800 CAK/W33

Spherical roller bearing with tapered bore and relubrication features

View full technical record →NSK

230/800CAME4

Spherical roller bearing

View full technical record →NSK

230/800CAMKE4

Spherical roller bearing

View full technical record →SKF

230/800 CA/W33

Spherical roller bearing with relubrication features

View full technical record →FAG

230/800-K-MB

Spherical Roller Bearing

View full technical record →TIMKEN

230/800KYMBW33W45A

Spherical roller bearing

View full technical record →FAG

230/800-MB

Spherical Roller Bearing

View full technical record →FAG

230/800-MB-C3

Spherical Roller Bearing

View full technical record →TIMKEN

230/800YMBW33W45A

Spherical roller bearing

View full technical record →
Filter all 178 prefix results →

Check the drawing before substituting

Nominal dimensions are not shaft-fit tolerances. Different variants can add grooves, flanges, wider rings or assembly components. When the table has different dimensions, the complete designation—not the shared prefix—controls.

Measurement guide →Cross-reference checks →

Reference basis & data limits

Manufacturer terminology is retained in the product records. Technical reference basis: JTEKT Basic Bearing Knowledge (boundary dimensions, tolerance classes and lubrication); NSK Bearing ABCs (lubrication, designations and clearance); NTN technical FAQs (closure codes and component interchange); SKF rolling-bearing selection and maintenance references.

Selection workflows and catalogue grouping are BearingScope editorial aids. Verify the current drawing and application requirements before using a candidate. Missing database information is not converted into an assumed match.

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