61903 bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with 61903. 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.
61903 dimensions and recorded technical data
The recorded 61903 base designation measures 17×30×7 mm (inside diameter d × outside diameter D × width B). This answer uses unsuffixed records from SKF. 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. 9 recorded variants are listed. A dash means the value is missing, not zero.
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) |
|---|---|---|---|---|---|---|
| SKF61903Deep groove ball bearing |
| 4.62 kN | 2.55 kN | 50000 rpm | 32000 rpm | 0.0154 kg15.4 g |
| SKF61903-2RS1Deep groove ball bearing with seals or shields |
| 4.62 kN | 2.55 kN | — | 14000 rpm | 0.0167 kg16.7 g |
| SKF61903-2RZDeep groove ball bearing with seals or shields |
| 4.62 kN | 2.55 kN | 50000 rpm | 26000 rpm | 0.0161 kg16.1 g |
| SKF61903-2ZDeep groove ball bearing with seals or shields |
| 4.62 kN | 2.55 kN | 50000 rpm | 26000 rpm | 0.0168 kg16.8 g |
| FAG61903-2RSR>NDeep groove ball bearing |
| 4.9 kN | 2.55 kN | — | 13000 rpm | 0.017 kg17 g |
| FAG61903-2Z-C3>NDeep groove ball bearing |
| 4.9 kN | 2.55 kN | 18500 rpm | 29500 rpm | 0.016 kg16 g |
| FAG61903-2Z>NDeep groove ball bearing |
| 4.9 kN | 2.55 kN | 18500 rpm | 29500 rpm | 0.016 kg16 g |
| FAG61903-C3>NDeep groove ball bearing |
| 4.9 kN | 2.55 kN | 18500 rpm | 35000 rpm | 0.012 kg12 g |
| FAG61903>NDeep groove ball bearing |
| 4.9 kN | 2.55 kN | 18500 rpm | 35000 rpm | 0.016 kg16 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 |
|---|---|---|---|---|---|---|
| SKF 61903 | Without | P6 | CN | Sheet metal | Bearing steel | None |
| SKF 61903-2RS1 | Seal on both sides | P6 | CN | Sheet metal | Bearing steel | Grease |
| SKF 61903-2RZ | Seal on both sides | P6 | CN | Not recorded | Bearing steel | Grease |
| SKF 61903-2Z | Shield on both sides | P6 | CN | Sheet metal | Bearing steel | Grease |
| FAG 61903-2RSR>N | 2RSR — Contact seal on both sides | PN — Normal (ISO 492:2023) | CN (Group N) — Normal internal clearance | JN — Steel sheet metal | Not recorded | Lubricating grease |
| FAG 61903-2Z-C3>N | 2Z — Non-contact shield on both sides | PN — Normal (ISO 492:2023) | C3 (Group 3) — Internal clearance larger than CN | JN — Steel sheet metal | Not recorded | Lubricating grease |
| FAG 61903-2Z>N | 2Z — Non-contact shield on both sides | PN — Normal (ISO 492:2023) | CN (Group N) — Normal internal clearance | JN — Steel sheet metal | Not recorded | Lubricating grease |
| FAG 61903-C3>N | Without — Not sealed | PN — Normal (ISO 492:2023) | C3 (Group 3) — Internal clearance larger than CN | JN — Steel sheet metal | Not recorded | Without — Bearing not greased |
| FAG 61903>N | Without — Not sealed | PN — Normal (ISO 492:2023) | CN (Group N) — Normal internal clearance | JN — Steel sheet metal | Not recorded | Without — Bearing not greased |
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.
61903
Deep groove ball bearing
View full technical record →SKF61903-2RS1
Deep groove ball bearing with seals or shields
View full technical record →FAG61903-2RSR>N
Deep groove ball bearing
View full technical record →SKF61903-2RZ
Deep groove ball bearing with seals or shields
View full technical record →SKF61903-2Z
Deep groove ball bearing with seals or shields
View full technical record →FAG61903-2Z-C3>N
Deep groove ball bearing
View full technical record →FAG61903-2Z>N
Deep groove ball bearing
View full technical record →FAG61903-C3>N
Deep groove ball bearing
View full technical record →FAG61903>N
Deep groove ball bearing
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.