NU320 bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with NU320. 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.
NU320 dimensions and recorded technical data
The recorded NU320 base designation measures 100×215×47 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. 25 recorded variants are listed. A dash means the value is missing, not zero.
Catalogue parameters for NU320
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 NU320 — 24 recorded parameters
Single row cylindrical roller bearings
Reference: NTN Europe public product catalogue; source snapshot 2026-10-02.
For this exact NTN NU320 record, the nominal envelope is 100×215×47 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: 3.937008×8.464567×1.850394 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 | 100 mm |
| External diameter | D | 215 mm |
| Bearing/Inner ring width | B | 47 mm |
| Upper roller diameter | E | 185.5 mm |
| Under roller diameter | F | 129.5 mm |
| Min fillet radius | rs | 3 mm |
| Min fillet radius | r1s | 3 mm |
| Radial clearance class | Not separately recorded | CN |
| Mass | Not separately recorded | 7.49 kg |
Performance
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Dynamic load | C | 330 kN |
| Static load | C0 | 335 kN |
| Fatigue limit load | Cu | 36 kN |
| Oil lubrication limit speed | N lim | 3800 r/min |
| Grease lubrication limit speed | N lim | 3300 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 | 113 mm |
| Small face shoulder max diameter | da max | 125 mm |
| Min inner ring GO diameter | db min | 132 mm |
| Max shoulder diameter OR | Da max | 202 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 |
No recorded variant matches these filters. Clear a filter to see other records; no substitute has been inferred.
| Brand / full designation | Named dimensions (mm / in) | Dynamic C (kN) | Static C0 (kN) | Reference speed (rpm) | Limiting speed (rpm) | Mass (kg / g) |
|---|---|---|---|---|---|---|
| NTNNU320Cylindrical roller bearing |
| 330 kN | 335 kN | — | — | 7.49 kg7490 g |
| SKFNU 320 ECJSingle row cylindrical roller bearing, NU design |
| 450 kN | 440 kN | 3200 rpm | 3800 rpm | 7.65 kg7650 g |
| SKFNU 320 ECJ/C3Single row cylindrical roller bearing, NU design |
| 450 kN | 440 kN | 3200 rpm | 3800 rpm | 7.65 kg7650 g |
| SKFNU 320 ECMSingle row cylindrical roller bearing, NU design |
| 450 kN | 440 kN | 3200 rpm | 3800 rpm | 8.5 kg8500 g |
| SKFNU 320 ECM/C3Single row cylindrical roller bearing, NU design |
| 450 kN | 440 kN | 3200 rpm | 3800 rpm | 8.5 kg8500 g |
| SKFNU 320 ECM/C3VL0241INSOCOAT single row cylindrical roller bearing, NU design |
| 450 kN | 440 kN | 3200 rpm | 3800 rpm | 1 kg1000 g |
| SKFNU 320 ECM/C4VA301Single row cylindrical roller bearing, NU design |
| 450 kN | 440 kN | 3200 rpm | 3800 rpm | 8.5 kg8500 g |
| SKFNU 320 ECMLSingle row cylindrical roller bearing, NU design |
| 450 kN | 440 kN | 3200 rpm | 6000 rpm | 8.33 kg8330 g |
| SKFNU 320 ECML/C3Single row cylindrical roller bearing, NU design |
| 450 kN | 440 kN | 3200 rpm | 6000 rpm | 8.33 kg8330 g |
| SKFNU 320 ECML/C4Single row cylindrical roller bearing, NU design |
| 450 kN | 440 kN | 3200 rpm | 6000 rpm | 8.33 kg8330 g |
| SKFNU 320 ECM/P64VA3091INSOCOAT single row cylindrical roller bearing, NU design |
| 450 kN | 440 kN | 3200 rpm | 3800 rpm | 8.5 kg8500 g |
| SKFNU 320 ECPSingle row cylindrical roller bearing, NU design |
| 450 kN | 440 kN | 3200 rpm | 3800 rpm | 7.45 kg7450 g |
| SKFNU 320 ECP/C3Single row cylindrical roller bearing, NU design |
| 450 kN | 440 kN | 3200 rpm | 3800 rpm | 7.44 kg7440 g |
| FAGNU320-E-XL-M1Cylindrical roller bearing |
| 450 kN | 425 kN | 3350 rpm | 5600 rpm | 8.42 kg8420 g |
| FAGNU320-E-XL-M1A-C3Cylindrical roller bearing |
| 450 kN | 425 kN | 3350 rpm | 5600 rpm | 8.986 kg8986 g |
| FAGNU320-E-XL-TVP2Cylindrical roller bearing |
| 450 kN | 425 kN | 3350 rpm | 4250 rpm | 7.41 kg7410 g |
| TIMKENNU320EJCylindrical roller bearing |
| 437 kN | 442 kN | — | — | 7 kg7000 g |
| TIMKENNU320EJC3Cylindrical roller bearing |
| 437 kN | 442 kN | — | — | 7 kg7000 g |
| TIMKENNU320EJC4Cylindrical roller bearing |
| 437 kN | 442 kN | — | — | 7 kg7000 g |
| TIMKENNU320EMACylindrical roller bearing |
| 437 kN | 442 kN | — | — | 8.4 kg8400 g |
| TIMKENNU320EMAC3Cylindrical roller bearing |
| 437 kN | 442 kN | — | — | 8.4 kg8400 g |
| TIMKENNU320EMAC4Cylindrical roller bearing |
| 437 kN | 442 kN | — | — | 8.4 kg8400 g |
| NSKNU320EMCylindrical roller bearing |
| 465 kN | 425 kN | — | — | — |
| NSKNU320WCylindrical roller bearing |
| 365 kN | 335 kN | — | — | — |
| KOYONU320RCylindrical roller bearing |
| 474 kN | 424 kN | — | 2700 rpmLimiting Speeds(Grease Lub.): 2700 min-1Limiting Speeds(Oil Lub.): 3600 min-1 | 7.75 kg7750 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 NU320 | Not recorded | Not recorded | CN | pressed steel cage | Not recorded | Not recorded |
| SKF NU 320 ECJ | Without | Not recorded | CN | Sheet metal | Not recorded | None |
| SKF NU 320 ECJ/C3 | Without | Not recorded | C3 | Sheet metal | Not recorded | None |
| SKF NU 320 ECM | Without | Not recorded | CN | Machined brass | Not recorded | None |
| SKF NU 320 ECM/C3 | Without | Not recorded | C3 | Machined brass | Not recorded | None |
| SKF NU 320 ECM/C3VL0241 | Without | Not recorded | C3 | Machined brass | Bearing steel | None |
| SKF NU 320 ECM/C4VA301 | Without | Not recorded | C4 | Machined brass | Not recorded | None |
| SKF NU 320 ECML | Without | Not recorded | CN | Machined brass | Not recorded | None |
| SKF NU 320 ECML/C3 | Without | Not recorded | C3 | Machined brass | Not recorded | None |
| SKF NU 320 ECML/C4 | Without | Not recorded | C4 | Machined brass | Not recorded | None |
| SKF NU 320 ECM/P64VA3091 | Without | Not recorded | C4 | Machined brass | Bearing steel | None |
| SKF NU 320 ECP | Without | Not recorded | CN | Non-metallic | Not recorded | None |
| SKF NU 320 ECP/C3 | Without | Not recorded | C3 | Non-metallic | Not recorded | None |
| FAG NU320-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 NU320-E-XL-M1A-C3 | Not recorded | PN — Normal (ISO 492:2023) | C3 (Group 3) — Internal clearance larger than CN | M1A — Two Piece Brass Cage Lip guided | Not recorded | Not recorded |
| FAG NU320-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 |
| TIMKEN NU320EJ | Open | Not recorded | Not recorded | Window Steel cage | Not recorded | Not recorded |
| TIMKEN NU320EJC3 | Open | Not recorded | Not recorded | Window Steel cage | Not recorded | Not recorded |
| TIMKEN NU320EJC4 | Open | Not recorded | Not recorded | Window Steel cage | Not recorded | Not recorded |
| TIMKEN NU320EMA | Open | Not recorded | Not recorded | Window Brass cage | Not recorded | Not recorded |
| TIMKEN NU320EMAC3 | Open | Not recorded | Not recorded | Window Brass cage | Not recorded | Not recorded |
| TIMKEN NU320EMAC4 | Open | Not recorded | Not recorded | Window Brass cage | Not recorded | Not recorded |
| NSK NU320EM | Not recorded | Not recorded | Not recorded | Machined brass | Not recorded | Not recorded |
| NSK NU320W | Not recorded | Not recorded | Not recorded | Pressed steel | Not recorded | Not recorded |
| KOYO NU320R | 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.
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.
NU320
Cylindrical roller bearing
View full technical record →KOYONU3206
Cylindrical roller bearing
View full technical record →KOYONU3207
Cylindrical roller bearing
View full technical record →KOYONU3208
Cylindrical roller bearing
View full technical record →KOYONU3209
Cylindrical roller bearing
View full technical record →SKFNU 320 ECJ
Single row cylindrical roller bearing, NU design
View full technical record →SKFNU 320 ECJ/C3
Single row cylindrical roller bearing, NU design
View full technical record →SKFNU 320 ECM
Single row cylindrical roller bearing, NU design
View full technical record →SKFNU 320 ECM/C3
Single row cylindrical roller bearing, NU design
View full technical record →SKFNU 320 ECM/C3VL0241
INSOCOAT single row cylindrical roller bearing, NU design
View full technical record →SKFNU 320 ECM/C4VA301
Single row cylindrical roller bearing, NU design
View full technical record →SKFNU 320 ECML
Single row cylindrical roller bearing, NU design
View full technical record →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.
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.