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NJ 2308 bearing dimensions & suffix variants

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

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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.

Exact model evidence

NJ 2308 dimensions and recorded technical data

The recorded NJ 2308 base designation measures 40×90×33 mm (inside diameter d × outside diameter D × width B). This answer uses unsuffixed records from 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. 12 recorded variants are listed. A dash means the value is missing, not zero.

Brand / full designation	Named dimensions (mm / in)	Dynamic C (kN)	Static C0 (kN)	Reference speed (rpm)	Limiting speed (rpm)	Mass (kg / g)
KOYONJ2308Cylindrical roller bearing	Bore diameter (d) 40 mm 1.574803 in Outside diameter (D) 90 mm 3.543307 in Width (B) 33 mm 1.299213 in	103 kN	88 kN	—	6100 rpmLimiting Speeds(Grease Lub.): 6100 min-1Limiting Speeds(Oil Lub.): 9100 min-1	0.986 kg986 g
SKFNJ 2308 ECJSingle row cylindrical roller bearing, NJ design	Bore diameter (d) 40 mm 1.574803 in Outside diameter (D) 90 mm 3.543307 in Width (B) 33 mm 1.299213 in	129 kN	120 kN	8000 rpm	9500 rpm	1.01 kg1010 g
SKFNJ 2308 ECJ/C3Single row cylindrical roller bearing, NJ design	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	129 kN	120 kN	8000 rpm	9500 rpm	1.01 kg1010 g
SKFNJ 2308 ECMLSingle row cylindrical roller bearing, NJ design	Bore diameter (d) 40 mm 1.574803 in Outside diameter (D) 90 mm 3.543307 in Width (B) 33 mm 1.299213 in	129 kN	120 kN	8000 rpm	15000 rpm	1.1 kg1100 g
SKFNJ 2308 ECML/C3Single row cylindrical roller bearing, NJ design	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	129 kN	120 kN	8000 rpm	15000 rpm	1.1 kg1100 g
SKFNJ 2308 ECPSingle row cylindrical roller bearing, NJ design	Bore diameter (d) 40 mm 1.574803 in Outside diameter (D) 90 mm 3.543307 in Width (B) 33 mm 1.299213 in	129 kN	120 kN	8000 rpm	9500 rpm	0.95 kg950 g
SKFNJ 2308 ECP/C3Single row cylindrical roller bearing, NJ design	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	129 kN	120 kN	8000 rpm	9500 rpm	0.95 kg950 g
SKFNJ 2308 ECP/C4Single row cylindrical roller bearing, NJ design	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	129 kN	120 kN	8000 rpm	9500 rpm	0.95 kg950 g
FAGNJ2308-E-XL-M1Cylindrical roller bearing	Bore diameter (d) 40 mm 1.574803 in Outside diameter (D) 90 mm 3.543307 in Width (B) 33 mm 1.299213 in	132 kN	119 kN	5800 rpm	14200 rpm	1.057 kg1057 g
FAGNJ2308-E-XL-TVP2Cylindrical roller bearing	Bore diameter (d) 40 mm 1.574803 in Outside diameter (D) 90 mm 3.543307 in Width (B) 33 mm 1.299213 in	132 kN	119 kN	5800 rpm	10900 rpm	0.951 kg951 g
NSKNJ2308ETCylindrical roller 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	140 kN	122 kN	—	—	—
KOYONJ2308RCylindrical roller bearing	Bore diameter (d) 40 mm 1.574803 in Outside diameter (D) 90 mm 3.543307 in Width (B) 33 mm 1.299213 in	143 kN	122 kN	—	6100 rpmLimiting Speeds(Grease Lub.): 6100 min-1Limiting Speeds(Oil Lub.): 9100 min-1	0.988 kg988 g

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 / designation	Closure	Original precision	Clearance	Cage	Material	Lubricant
KOYO NJ2308	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded
SKF NJ 2308 ECJ	Without	Not recorded	CN	Sheet metal	Not recorded	None
SKF NJ 2308 ECJ/C3	Without	Not recorded	C3	Sheet metal	Not recorded	None
SKF NJ 2308 ECML	Without	Not recorded	CN	Machined brass	Not recorded	None
SKF NJ 2308 ECML/C3	Without	Not recorded	C3	Machined brass	Not recorded	None
SKF NJ 2308 ECP	Without	Not recorded	CN	Non-metallic	Not recorded	None
SKF NJ 2308 ECP/C3	Without	Not recorded	C3	Non-metallic	Not recorded	None
SKF NJ 2308 ECP/C4	Without	Not recorded	C4	Non-metallic	Not recorded	None
FAG NJ2308-E-XL-M1	Not recorded	PN — Normal (ISO 492:2023)	CN (Group N) — Normal internal clearance	M1 — Two Piece Brass Cage Roller Guided	Not recorded	Not recorded
FAG NJ2308-E-XL-TVP2	Not recorded	PN — Normal (ISO 492:2023)	CN (Group N) — Normal internal clearance	TVP2 — Solid Window Cage made from PA66	Not recorded	Not recorded
NSK NJ2308ET	Not recorded	Not recorded	Not recorded	Polyamide 66	Not recorded	Not recorded
KOYO NJ2308R	Not recorded	Not recorded	Not recorded	Not recorded	Not recorded	Not 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.

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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.

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