30203 bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with 30203. 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.
30203 dimensions and recorded technical data
Use the named dimensions for each complete record below. A generic d×D×B answer is not asserted where the base record is missing, dimension symbols are unverified, or the product uses a different geometry such as a housing or thrust assembly. Suffix records are not substituted for a missing base specification.
The numeric series boundary is preserved: a longer number is not included merely because its first digits match. 11 recorded variants are listed. A dash means the value is missing, not zero.
Read the original dimensions for 30203
Boundary size alone does not describe every ring, shoulder or assembled unit. These tables retain the recorded manufacturer labels, symbols, units and limits for each complete marking. Expand a record to check its detailed measurements.
Important: an approximate value, a minimum or a maximum keeps that qualifier. These reference extracts are not CAD drawings, fit recommendations or replacement approvals.
TIMKEN 30203 — 14 dimension fields
Tapered roller bearing. Source: Timken official dimensional catalogue; recorded snapshot 2026-10-01.
Metric and inch measurements below are the values published together in this dated manufacturer record. Their displayed rounding is retained; the inch column does not turn a metric design into an inch-series design.
This assembly is identified by cone X30203 and cup Y30203. T is the assembled width; B and C are the separate ring widths. A loose cone, a loose cup and the complete assembly are not the same item.
Shaft and housing backing-shoulder dimensions, maximum fillet radii and signed offsets answer different installation questions. Preserve the named face, limit and sign; they are not additional bearing outside diameters or nominal widths.
This factual extract is a dimensional reference, not an OEM fitment statement, a replacement approval or a downloadable CAD model.
Bearing and component measurements
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Bore (d) | d | 17 mm / 0.6693 in |
| O.D. (D) | D | 40 mm / 1.5748 in |
| Width (T) | T | 13.250 mm / 0.5217 in |
| Inner Ring Width (B) | B | 12.000 mm / 0.4724 in |
| Outer Ring Width (C) | C | 11.000 mm / 0.4331 in |
| Effective Center Location | Not supplied separately | -3.6 mm / -0.14 in |
Mounting limits and abutments
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Max Shaft Fillet Radius | Not supplied separately | 1.020 mm / 0.040 in |
| Max Housing Fillet Radius | Not supplied separately | 1.02 mm / 0.04 in |
| Shaft Backing Shoulder Dia. - Frontface (da) | da | 21 mm / 0.83 in |
| Shaft Backing Shoulder Dia. - Backface (db) | db | 22 mm / 0.87 in |
| Housing Backing Shoulder Dia. - Frontface (Da) | Da | 37.59 mm / 1.48 in |
| Housing Backing Shoulder Dia. - Backface (Db) | Db | 35.05 mm / 1.38 in |
| Cage Location rel. to BF (Aa) | Aa | -0.3 mm / -0.01 in |
| Cage Location rel. to FF (Ab) | Ab | 2 mm / 0.08 in |
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) |
|---|---|---|---|---|---|---|
| SKF30203Single row tapered roller bearing |
| 23.4 kN | 18.6 kN | 15000 rpm | 18000 rpm | 0.0774 kg77.4 g |
| TIMKEN30203Tapered roller bearing |
| 21.3 kN | 19.9 kN | — | — | 0.08 kg80 g |
| SKF30203/VA983Special single row tapered roller bearing |
| 21.3 kN | 19.6 kN | 13000 rpm | 18000 rpm | 0.08 kg80 g |
| FAG30203-ATapered roller bearing |
| 19.2 kN | 18.7 kN | 11800 rpm | 20100 rpm | 0.0777 kg77.7 g |
| FAG30203-A-TVPTapered roller bearing |
| 19.2 kN | 18.7 kN | 11800 rpm | 20100 rpm | 0.075 kg75 g |
| FAG30203-DYTapered roller bearing |
| 18.9 kN | 18.3 kN | 11900 rpm | 20200 rpm | 0.078 kg78 g |
| FAG30203-HTapered roller bearing |
| 18.2 kN | 18.7 kN | 11800 rpm | 16080 rpm | 0.079 kg79 g |
| FAG30203-XLTapered roller bearing |
| 24.1 kN | 19 kN | 11800 rpm | 24400 rpm | 0.079 kg79 g |
| TIMKEN30203-99E60Tapered roller bearing |
| 21.3 kN | 19.9 kN | — | — | 0.08 kg80 g |
| TIMKEN30203-99KA1Tapered roller bearing |
| 21.3 kN | 19.9 kN | — | — | 0.08 kg80 g |
| KOYO30203JRTapered roller bearing |
| 26 kN | 20.7 kN | — | 10000 rpmLimiting Speeds(Grease Lub.): 10000 min-1Limiting Speeds(Oil Lub.): 14000 min-1 | 0.081 kg81 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 30203 | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| TIMKEN 30203 | Open | ABMA Class K | Not recorded | Steel cage | Not recorded | Not recorded |
| SKF 30203/VA983 | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| FAG 30203-A | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | Not recorded | Not recorded |
| FAG 30203-A-TVP | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | TVP — Cage made of glass-fiber reinforced plastic, window cage | Not recorded | Not recorded |
| FAG 30203-DY | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | Not recorded | Not recorded |
| FAG 30203-H | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | Not recorded | Not recorded |
| FAG 30203-XL | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | Not recorded | Not recorded |
| TIMKEN 30203-99E60 | Open | ABMA Class K | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 30203-99KA1 | Open | ABMA Class K | Not recorded | Steel cage | Not recorded | Not recorded |
| KOYO 30203JR | 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.
30203
Tapered roller bearing
View full technical record →SKF30203
Single row tapered roller bearing
View full technical record →TIMKEN30203-99E60
Tapered roller bearing
View full technical record →TIMKEN30203-99KA1
Tapered roller bearing
View full technical record →FAG30203-A
Tapered roller bearing
View full technical record →FAG30203-A-TVP
Tapered roller bearing
View full technical record →FAG30203-DY
Tapered roller bearing
View full technical record →FAG30203-H
Tapered roller bearing
View full technical record →KOYO30203JR
Tapered roller bearing
View full technical record →SKF30203/VA983
Special single row tapered roller bearing
View full technical record →FAG30203-XL
Tapered roller 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.