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NU228 bearing dimensions & suffix variants

Look up recorded dimensions for designations beginning with NU228. 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

NU228 dimensions and recorded technical data

The recorded NU228 base designation measures 140×250×42 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. 19 recorded variants are listed. A dash means the value is missing, not zero.

Exact designation reference

Catalogue parameters for NU228

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 NU228

NTN NU228 — 24 recorded parameters

Single row cylindrical roller bearings

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

For this exact NTN NU228 record, the nominal envelope is 140×250×42 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: 5.511811×9.842520×1.653543 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	140 mm
External diameter	D	250 mm
Bearing/Inner ring width	B	42 mm
Upper roller diameter	E	221 mm
Under roller diameter	F	169 mm
Min fillet radius	rs	3 mm
Min fillet radius	r1s	3 mm
Radial clearance class	Not separately recorded	CN
Mass	Not separately recorded	7.88 kg

Performance

Parameter	Source symbol	Recorded value
Dynamic load	C	345 kN
Static load	C0	400 kN
Fatigue limit load	Cu	39.5 kN
Oil lubrication limit speed	N lim	3100 r/min
Grease lubrication limit speed	N lim	2700 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	153 mm
Small face shoulder max diameter	da max	166 mm
Min inner ring GO diameter	db min	171 mm
Max shoulder diameter OR	Da max	237 mm
Max fillet radius	ra max	2.5 mm
Max fillet radius	r1a	2.5 mm

Product characteristics

Parameter	Source symbol	Recorded value
Catalogue construction	Not separately recorded	Single row cylindrical roller bearing, floating, separable, pressed steel cage
Cage construction	Not separately recorded	pressed steel cage

Open NTN NU228 product record →

Clearance tables →Precision classes →Load calculations →Interchange checks →

Brand / full designation	Named dimensions (mm / in)	Dynamic C (kN)	Static C0 (kN)	Reference speed (rpm)	Limiting speed (rpm)	Mass (kg / g)
NTNNU228Cylindrical roller bearing	Internal diameter (d) 140 mm 5.511811 in External diameter (D) 250 mm 9.84252 in Bearing/Inner ring width (B) 42 mm 1.653543 in	345 kN	400 kN	—	—	7.88 kg7880 g
SKFNU 228 ECJSingle row cylindrical roller bearing, NU design	Bore diameter (d) 140 mm 5.511811 in Outside diameter (D) 250 mm 9.84252 in Width (B) 42 mm 1.653543 in	450 kN	510 kN	2800 rpm	3200 rpm	8.14 kg8140 g
SKFNU 228 ECJ/C3Single row cylindrical roller bearing, NU design	Recorded bore (d) 140 mm 5.511811 in Recorded outside dimension (D) 250 mm 9.84252 in Catalogue width (symbol unverified) 42 mm 1.653543 in	450 kN	510 kN	2800 rpm	3200 rpm	8.14 kg8140 g
SKFNU 228 ECMSingle row cylindrical roller bearing, NU design	Bore diameter (d) 140 mm 5.511811 in Outside diameter (D) 250 mm 9.84252 in Width (B) 42 mm 1.653543 in	450 kN	510 kN	2800 rpm	3200 rpm	9.05 kg9050 g
SKFNU 228 ECM/C3Single row cylindrical roller bearing, NU design	Recorded bore (d) 140 mm 5.511811 in Recorded outside dimension (D) 250 mm 9.84252 in Catalogue width (symbol unverified) 42 mm 1.653543 in	450 kN	510 kN	2800 rpm	3200 rpm	9.05 kg9050 g
SKFNU 228 ECMLSingle row cylindrical roller bearing, NU design	Bore diameter (d) 140 mm 5.511811 in Outside diameter (D) 250 mm 9.84252 in Width (B) 42 mm 1.653543 in	450 kN	510 kN	2800 rpm	4800 rpm	9.24 kg9240 g
SKFNU 228 ECML/C3Single row cylindrical roller bearing, NU design	Recorded bore (d) 140 mm 5.511811 in Recorded outside dimension (D) 250 mm 9.84252 in Catalogue width (symbol unverified) 42 mm 1.653543 in	450 kN	510 kN	2800 rpm	4800 rpm	9.03 kg9030 g
SKFNU 228 ECMR/P64HVG2921Single row cylindrical roller bearing, NU design	Recorded bore (d) 140 mm 5.511811 in Recorded outside dimension (D) 250 mm 9.84252 in Catalogue width (symbol unverified) 42 mm 1.653543 in	358 kN	465 kN	2800 rpm	3200 rpm	8.84 kg8840 g
FAGNU228-E-XL-M1Cylindrical roller bearing	Bore diameter (d) 140 mm 5.511811 in Outside diameter (D) 250 mm 9.84252 in Width (B) 42 mm 1.653543 in	460 kN	510 kN	2600 rpm	4900 rpm	9.02 kg9020 g
FAGNU228-E-XL-M1ACylindrical roller bearing	Bore diameter (d) 140 mm 5.511811 in Outside diameter (D) 250 mm 9.84252 in Width (B) 42 mm 1.653543 in	460 kN	510 kN	2600 rpm	4900 rpm	9.5 kg9500 g
FAGNU228-E-XL-MCACylindrical roller bearing	Bore diameter (d) 140 mm 5.511811 in Outside diameter (D) 250 mm 9.84252 in Width (B) 42 mm 1.653543 in	460 kN	510 kN	2600 rpm	4900 rpm	9.24 kg9240 g
FAGNU228-E-XL-MCA-P5-C3Cylindrical roller bearing	Bore diameter (d) 140 mm 5.511811 in Outside diameter (D) 250 mm 9.84252 in Width (B) 42 mm 1.653543 in	460 kN	510 kN	2600 rpm	4900 rpm	9.04 kg9040 g
FAGNU228-E-XL-MCA-P5-C4Cylindrical roller bearing	Bore diameter (d) 140 mm 5.511811 in Outside diameter (D) 250 mm 9.84252 in Width (B) 42 mm 1.653543 in	460 kN	510 kN	2600 rpm	4900 rpm	9.1 kg9100 g
TIMKENNU228EJCylindrical roller bearing	Recorded bore (d) 140 mm 5.511811 in Recorded outside dimension (D) 250 mm 9.84252 in Catalogue width (symbol unverified) 42 mm 1.653543 in	478 kN	526 kN	—	—	8.1 kg8100 g
TIMKENNU228EJC3Cylindrical roller bearing	Recorded bore (d) 140 mm 5.511811 in Recorded outside dimension (D) 250 mm 9.84252 in Catalogue width (symbol unverified) 42 mm 1.653543 in	478 kN	526 kN	—	—	8.1 kg8100 g
TIMKENNU228EMACylindrical roller bearing	Recorded bore (d) 140 mm 5.511811 in Recorded outside dimension (D) 250 mm 9.84252 in Catalogue width (symbol unverified) 42 mm 1.653543 in	443 kN	526 kN	—	—	9 kg9000 g
TIMKENNU228EMAC3Cylindrical roller bearing	Recorded bore (d) 140 mm 5.511811 in Recorded outside dimension (D) 250 mm 9.84252 in Catalogue width (symbol unverified) 42 mm 1.653543 in	443 kN	526 kN	—	—	9 kg9000 g
NSKNU228EMCylindrical roller bearing	Bore diameter (d) 140 mm 5.511811 in Outside diameter (D) 250 mm 9.84252 in Bearing width (B) 42 mm 1.653543 in	485 kN	515 kN	—	—	—
KOYONU228RCylindrical roller bearing	Bore diameter (d) 140 mm 5.511811 in Outside diameter (D) 250 mm 9.84252 in Width (B) 42 mm 1.653543 in	491 kN	514 kN	—	2400 rpmLimiting Speeds(Grease Lub.): 2400 min-1Limiting Speeds(Oil Lub.): 2900 min-1	8.5 kg8500 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 NU228	Not recorded	Not recorded	CN	pressed steel cage	Not recorded	Not recorded
SKF NU 228 ECJ	Without	Not recorded	CN	Sheet metal	Not recorded	None
SKF NU 228 ECJ/C3	Without	Not recorded	C3	Sheet metal	Not recorded	None
SKF NU 228 ECM	Without	Not recorded	CN	Machined brass	Not recorded	None
SKF NU 228 ECM/C3	Without	Not recorded	C3	Machined brass	Not recorded	None
SKF NU 228 ECML	Without	Not recorded	CN	Machined brass	Not recorded	None
SKF NU 228 ECML/C3	Without	Not recorded	C3	Machined brass	Not recorded	None
SKF NU 228 ECMR/P64HVG2921	Without	Not recorded	C4	Machined brass	Not recorded	None
FAG NU228-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 NU228-E-XL-M1A	Not recorded	PN — Normal (ISO 492:2023)	CN (Group N) — Normal internal clearance	M1A — Two Piece Brass Cage Lip guided	Not recorded	Not recorded
FAG NU228-E-XL-MCA	Not recorded	Not recorded	Not recorded	MCA — Messing Käfig, einteilig, bordgeführt am Außenring	Not recorded	Not recorded
FAG NU228-E-XL-MCA-P5-C3	Not recorded	Not recorded	Not recorded	MCA — Messing Käfig, einteilig, bordgeführt am Außenring	Not recorded	Not recorded
FAG NU228-E-XL-MCA-P5-C4	Not recorded	Not recorded	Not recorded	MCA — Messing Käfig, einteilig, bordgeführt am Außenring	Not recorded	Not recorded
TIMKEN NU228EJ	Open	Not recorded	Not recorded	Window Steel cage	Not recorded	Not recorded
TIMKEN NU228EJC3	Open	Not recorded	Not recorded	Window Steel cage	Not recorded	Not recorded
TIMKEN NU228EMA	Open	Not recorded	Not recorded	Window Brass cage	Not recorded	Not recorded
TIMKEN NU228EMAC3	Open	Not recorded	Not recorded	Window Brass cage	Not recorded	Not recorded
NSK NU228EM	Not recorded	Not recorded	Not recorded	Machined brass	Not recorded	Not recorded
KOYO NU228R	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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