NU 320 bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with NU 320. 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.
NU 320 dimensions and recorded technical data
The recorded NU 320 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 NU 320
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.