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NJ 312 bearing dimensions & suffix variants

Look up recorded dimensions for designations beginning with NJ 312. 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 312 dimensions and recorded technical data

The recorded NJ 312 base designation measures 60×130×31 mm (inside diameter d × outside diameter D × width B). This answer uses unsuffixed records from NTN. 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. 15 recorded variants are listed. A dash means the value is missing, not zero.

Exact designation reference

Catalogue parameters for NJ 312

Choose the complete brand and marking before reading a value. These source-labelled records add dimensions, construction and engineering properties where they were recorded; a shared model number does not establish interchangeability.

Units, ranges and minimum/maximum qualifiers are retained. The data is a dated catalogue reference, not a certified drawing, a complete current specification or an operating approval.

NTN NJ312

NTN NJ312 — 24 recorded parameters

Single row cylindrical roller bearings

Reference: NTN Europe public product catalogue; source snapshot 2026-10-02.

For this exact NTN NJ312 record, the nominal envelope is 60×130×31 mm (d = internal diameter; D = external diameter; B = bearing/inner ring width). These are bearing or washer dimensions, not shaft/housing fit limits.

Calculated inch equivalent: 2.362205×5.118110×1.220472 in, in the same axis order. The conversion uses exactly 25.4 mm per inch and rounds to six decimals; it is not an inch-series designation or a machining tolerance.

Keep the prefix when matching this cylindrical roller bearing. The source construction below, including any axial-load direction statement, belongs only to the complete recorded designation; a similar NU, NJ or NUP number is not an approved substitute.

Use grease- and oil-qualified speed entries only for the named lubrication condition. Dynamic C and static C0 are catalogue ratings, not a universal safe load or installation approval; shoulder and fillet limits are separate from boundary size.

Dimensions and properties

Parameter	Source symbol	Recorded value
Internal diameter	d	60 mm
External diameter	D	130 mm
Bearing/Inner ring width	B	31 mm
Upper roller diameter	E	113 mm
Under roller diameter	F	77 mm
IR flange outer diameter	d1	84.2 mm
Min fillet radius	rs	2.1 mm
Min fillet radius	r1s	2.1 mm
Radial clearance class	Not separately recorded	CN
Mass	Not separately recorded	1.827 kg

Performance

Parameter	Source symbol	Recorded value
Dynamic load	C	137 kN
Static load	C0	126 kN
Fatigue limit load	Cu	15.4 kN
Oil lubrication limit speed	N lim	6500 r/min
Grease lubrication limit speed	N lim	5500 r/min
Min operating temperature	Tmin	-40 °C
Max operating temperature	Tmax	120 °C

Mounting dimensions

Parameter	Source symbol	Recorded value
Min shoulder diameter IR	da min	71 mm
Small face shoulder max diameter	da max	75 mm
Min inner ring GO diameter	dc min	86 mm
Max shoulder diameter OR	Da max	119 mm
Max fillet radius	ra max	2 mm

Product characteristics

Parameter	Source symbol	Recorded value
Catalogue construction	Not separately recorded	Single row cylindrical roller bearing, single direction for axial loads, separable, pressed steel cage.
Cage construction	Not separately recorded	pressed steel cage.

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Brand / full designation	Named dimensions (mm / in)	Dynamic C (kN)	Static C0 (kN)	Reference speed (rpm)	Limiting speed (rpm)	Mass (kg / g)
NTNNJ312Cylindrical roller bearing	Internal diameter (d) 60 mm 2.362205 in External diameter (D) 130 mm 5.11811 in Bearing/Inner ring width (B) 31 mm 1.220472 in	137 kN	126 kN	—	—	1.827 kg1827 g
SKFNJ 312 ECJSingle row cylindrical roller bearing, NJ design	Bore diameter (d) 60 mm 2.362205 in Outside diameter (D) 130 mm 5.11811 in Width (B) 31 mm 1.220472 in	173 kN	160 kN	5600 rpm	6700 rpm	1.87 kg1870 g
SKFNJ 312 ECJ/C3Single row cylindrical roller bearing, NJ design	Recorded bore (d) 60 mm 2.362205 in Recorded outside dimension (D) 130 mm 5.11811 in Catalogue width (symbol unverified) 31 mm 1.220472 in	173 kN	160 kN	5600 rpm	6700 rpm	1.82 kg1820 g
SKFNJ 312 ECMSingle row cylindrical roller bearing, NJ design	Bore diameter (d) 60 mm 2.362205 in Outside diameter (D) 130 mm 5.11811 in Width (B) 31 mm 1.220472 in	173 kN	160 kN	5600 rpm	6700 rpm	2.18 kg2180 g
SKFNJ 312 ECM/C3Single row cylindrical roller bearing, NJ design	Recorded bore (d) 60 mm 2.362205 in Recorded outside dimension (D) 130 mm 5.11811 in Catalogue width (symbol unverified) 31 mm 1.220472 in	173 kN	160 kN	5600 rpm	6700 rpm	2.12 kg2120 g
SKFNJ 312 ECM/C4VA301Single row cylindrical roller bearing, NJ design	Recorded bore (d) 60 mm 2.362205 in Recorded outside dimension (D) 130 mm 5.11811 in Catalogue width (symbol unverified) 31 mm 1.220472 in	173 kN	160 kN	5600 rpm	6700 rpm	2.12 kg2120 g
SKFNJ 312 ECMLSingle row cylindrical roller bearing, NJ design	Bore diameter (d) 60 mm 2.362205 in Outside diameter (D) 130 mm 5.11811 in Width (B) 31 mm 1.220472 in	173 kN	160 kN	5600 rpm	10000 rpm	2.06 kg2060 g
SKFNJ 312 ECPSingle row cylindrical roller bearing, NJ design	Bore diameter (d) 60 mm 2.362205 in Outside diameter (D) 130 mm 5.11811 in Width (B) 31 mm 1.220472 in	173 kN	160 kN	5600 rpm	6700 rpm	1.83 kg1830 g
SKFNJ 312 ECP/C3Single row cylindrical roller bearing, NJ design	Recorded bore (d) 60 mm 2.362205 in Recorded outside dimension (D) 130 mm 5.11811 in Catalogue width (symbol unverified) 31 mm 1.220472 in	173 kN	160 kN	5600 rpm	6700 rpm	1.83 kg1830 g
SKFNJ 312 ECP/C4Single row cylindrical roller bearing, NJ design	Recorded bore (d) 60 mm 2.362205 in Recorded outside dimension (D) 130 mm 5.11811 in Catalogue width (symbol unverified) 31 mm 1.220472 in	173 kN	160 kN	5600 rpm	6700 rpm	1.83 kg1830 g
FAGNJ312-E-XL-M1Cylindrical roller bearing	Bore diameter (d) 60 mm 2.362205 in Outside diameter (D) 130 mm 5.11811 in Width (B) 31 mm 1.220472 in	177 kN	157 kN	5200 rpm	9600 rpm	2.031 kg2031 g
FAGNJ312-E-XL-TVP2Cylindrical roller bearing	Bore diameter (d) 60 mm 2.362205 in Outside diameter (D) 130 mm 5.11811 in Width (B) 31 mm 1.220472 in	177 kN	157 kN	5200 rpm	7400 rpm	1.84 kg1840 g
NSKNJ312EMCylindrical roller bearing	Bore diameter (d) 60 mm 2.362205 in Outside diameter (D) 130 mm 5.11811 in Bearing width (B) 31 mm 1.220472 in	184 kN	157 kN	—	—	—
NSKNJ312WCylindrical roller bearing	Bore diameter (d) 60 mm 2.362205 in Outside diameter (D) 130 mm 5.11811 in Bearing width (B) 31 mm 1.220472 in	152 kN	126 kN	—	—	—
KOYONJ312RCylindrical roller bearing	Bore diameter (d) 60 mm 2.362205 in Outside diameter (D) 130 mm 5.11811 in Width (B) 31 mm 1.220472 in	187 kN	157 kN	—	4600 rpmLimiting Speeds(Grease Lub.): 4600 min-1Limiting Speeds(Oil Lub.): 6200 min-1	1.92 kg1920 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
NTN NJ312	Not recorded	Not recorded	CN	pressed steel cage.	Not recorded	Not recorded
SKF NJ 312 ECJ	Without	Not recorded	CN	Sheet metal	Not recorded	None
SKF NJ 312 ECJ/C3	Without	Not recorded	C3	Sheet metal	Not recorded	None
SKF NJ 312 ECM	Without	Not recorded	CN	Machined brass	Not recorded	None
SKF NJ 312 ECM/C3	Without	Not recorded	C3	Machined brass	Not recorded	None
SKF NJ 312 ECM/C4VA301	Without	Not recorded	C4	Machined brass	Not recorded	None
SKF NJ 312 ECML	Without	Not recorded	CN	Machined brass	Not recorded	None
SKF NJ 312 ECP	Without	Not recorded	CN	Non-metallic	Not recorded	None
SKF NJ 312 ECP/C3	Without	Not recorded	C3	Non-metallic	Not recorded	None
SKF NJ 312 ECP/C4	Without	Not recorded	C4	Non-metallic	Not recorded	None
FAG NJ312-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 NJ312-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 NJ312EM	Not recorded	Not recorded	Not recorded	Machined brass	Not recorded	Not recorded
NSK NJ312W	Not recorded	Not recorded	Not recorded	Pressed steel	Not recorded	Not recorded
KOYO NJ312R	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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