15123 bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with 15123. The table retains complete manufacturer designations so special suffixes and different dimensional variants remain visible.
On this page6 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.
TIMKEN 15123 — individual cone dimensions
TIMKEN 15123 is an individual tapered-roller cone: the inner ring, rollers and cage, not the complete cone-and-cup bearing. The manufacturer lists bore d = 31.750 mm (1 1/4 in) and inner-ring width B = 19.050 mm (0.7500 in).
| Measurement | Symbol | Metric | Inches |
|---|---|---|---|
| Bore (d) | d | 31.750 mm | 1 1/4 in |
| Inner Ring Width (B) | B | 19.050 mm | 0.7500 in |
| Effective Center Location | Not specified | -4.8 mm | -0.19 in |
| Shaft Backing Shoulder Diameter - Frontface (da) | da | 38.5 mm | 1.52 in |
| Shaft Backing Shoulder Diameter - Backface (db) | db | 45.5 mm | 1.79 in |
| Cage Location rel. to BF (Aa) | Aa | -0.3 mm | -0.01 in |
| Cage Location rel. to FF (Ab) | Ab | 2.5 mm | 0.1 in |
Use the component number correctly
- The bore identifies the shaft-side nominal opening. B measures this cone only; it is not the assembled bearing width T. This single-cone record does not establish an outside diameter D or a matching cup.
- Preserve the full component number and its suffix. A shared prefix, similar ring size or a related-products suggestion does not approve a cone/cup combination or a cross-brand replacement.
- For a complete bearing, check both component markings and the manufacturer’s assembled d×D×T record. B+C is not a valid way to calculate T. A seal, axle rating, vehicle application and tightening procedure need their own evidence.
- Optional measurements with inconsistent printed metric and inch values are omitted from this supplement: Max Shaft Fillet Radius. Verify the manufacturer drawing before using these particular limits.
Factual reference: Timken official individual-component catalogue; source snapshot 2026-10-02. Original interpretation by BearingScope. These measurements do not certify a complete assembly, fit or interchange.
15123 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. 14 recorded variants are listed. A dash means the value is missing, not zero.
Read the original dimensions for 15123
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 15123 / 15245 — 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 15123 and cup 15245. 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.
The source lists differing metric/inch values for Max Shaft Fillet Radius. These values are retained as a visible source discrepancy; confirm the current drawing before using them.
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 | 31.750 mm / 1 1/4 in |
| O.D. (D) | D | 61.999 mm / 2.4409 in |
| Width (T) | T | 18.161 mm / 0.715 in |
| Inner Ring Width (B) | B | 19.050 mm / 0.7500 in |
| Outer Ring Width (C) | C | 14.288 mm / 0.5625 in |
| Effective Center Location | Not supplied separately | -4.8 mm / -0.19 in |
Mounting limits and abutments
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Max Shaft Fillet Radius | Not supplied separately | 3.600 mm / 0.140 in — source units differ; verify before use |
| Max Housing Fillet Radius | Not supplied separately | 1.27 mm / 0.050 in |
| Shaft Backing Shoulder Dia. - Frontface (da) | da | 38.5 mm / 1.52 in |
| Shaft Backing Shoulder Dia. - Backface (db) | db | 45.5 mm / 1.79 in |
| Housing Backing Shoulder Dia. - Frontface (Da) | Da | 58.42 mm / 2.30 in |
| Housing Backing Shoulder Dia. - Backface (Db) | Db | 55.12 mm / 2.17 in |
| Cage Location rel. to BF (Aa) | Aa | -0.3 mm / -0.01 in |
| Cage Location rel. to FF (Ab) | Ab | 2.5 mm / 0.1 in |
Catalogue parameters for 15123
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.
SKF 15123 — 16 recorded parameters
Single row tapered roller bearing, cone
Reference: SKF product catalogue; source snapshot 2026-09-02.
SKF 15123 is the inner-ring/cone component, not a complete cone-and-cup assembly. Its recorded bore is 31.75 mm and inner-ring width is 19.05 mm.
Calculated inch reference (cone bore × inner-ring width): 1.25 × 0.75 in. This converts the recorded millimetres using exactly 25.4 mm/in and rounds to six decimals; it does not change the nominal series or supply machining tolerances.
An assembled outside diameter and total set width cannot be obtained from these two component dimensions. Match the separately identified cup and its documented assembly before evaluating a replacement; the record does not establish that pairing.
This designation identifies a tapered-bearing component. A cone or cup alone is not the assembled bearing; use the documented pairing and total assembly width before comparing an interchange.
Values shown are retained from the recorded source. Zero boundary dimensions and zero load ratings from incomplete legacy feeds are withheld rather than presented as usable specifications.
Dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Bore diameter | Not separately recorded | 31.75 mm |
| Width, total | Not separately recorded | 19.05 mm |
| Width, inner ring | Not separately recorded | 19.05 mm |
Performance
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Basic dynamic load rating | Not separately recorded | 59.5 kN |
| Basic static load rating | Not separately recorded | 57.0 kN |
Properties
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Bearing part | Not separately recorded | Inner ring, cage and roller assembly (cone assembly) |
| Bore type | Not separately recorded | Cylindrical |
| Cage | Not separately recorded | Sheet metal |
| Arrangement of contact angle (double-row bearing) | Not separately recorded | Not applicable |
| Matched arrangement | Not separately recorded | No |
| Coating | Not separately recorded | Without |
| Sealing | Not separately recorded | Without |
| Relubrication feature | Not separately recorded | Without |
| Unit system | Not separately recorded | Inch |
| Indicative carbon footprint for new product | Not separately recorded | 0.6 kg CO 2 e |
Logistics
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Product net weight | Not separately recorded | 0.162 kg |
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) |
|---|---|---|---|---|---|---|
| SKF15123Single row tapered roller bearing, cone |
| 59.5 kN | 57 kN | — | — | 0.162 kg162 g |
| SKF15123/15245Single row tapered roller bearing |
| 59.5 kN | 57 kN | 9000 rpm | 11000 rpm | 0.24 kg240 g |
| SKF15123/15245/VA983Special single row tapered roller bearing |
| 45.2 kN | 47.5 kN | 8000 rpm | 11000 rpm | 0.233 kg233 g |
| TIMKEN15123 / 15243Tapered roller bearing |
| 59.9 kN | 53.9 kN | — | — | 0.24 kg240 g |
| TIMKEN15123 / 15244Tapered roller bearing |
| 59.9 kN | 53.9 kN | — | — | 0.25 kg250 g |
| TIMKEN15123 / 15245Tapered roller bearing |
| 59.9 kN | 53.9 kN | — | — | 0.24 kg240 g |
| TIMKEN15123 / 15249Tapered roller bearing |
| 59.9 kN | 53.9 kN | — | — | 0.27 kg270 g |
| TIMKEN15123 / 15250Tapered roller bearing |
| 59.9 kN | 53.9 kN | — | — | 0.27 kg270 g |
| TIMKEN15123 / 15250BTapered roller bearing |
| 59.9 kN | 53.9 kN | — | — | 0.29 kg290 g |
| TIMKEN15123 / 15250XTapered roller bearing |
| 59.9 kN | 53.9 kN | — | — | 0.27 kg270 g |
| TIMKEN15123-90086Tapered roller bearing |
| 104 kN | 108 kN | — | — | 0.61 kg610 g |
| TIMKEN15123-902A3Tapered roller bearing |
| 104 kN | 108 kN | — | — | 0.61 kg610 g |
| TIMKEN15123-903A2Tapered roller bearing |
| 59.9 kN | 53.9 kN | — | — | 0.24 kg240 g |
| KOYO15123/245Tapered roller bearing |
| 55.7 kN | 50.7 kN | — | 6400 rpmLimiting Speeds(Grease Lub.): 6400 min-1Limiting Speeds(Oil Lub.): 8600 min-1 | 0.238 kg238 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 15123 | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| SKF 15123/15245 | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| SKF 15123/15245/VA983 | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| TIMKEN 15123 / 15243 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 15123 / 15244 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 15123 / 15245 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 15123 / 15249 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 15123 / 15250 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 15123 / 15250B | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 15123 / 15250X | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 15123-90086 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 15123-902A3 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 15123-903A2 | Open | ABMA Class 3 | Not recorded | Steel cage | Not recorded | Not recorded |
| KOYO 15123/245 | 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.
15123
Single row tapered roller bearing, cone
View full technical record →TIMKEN15123 / 15243
Tapered roller bearing
View full technical record →TIMKEN15123 / 15244
Tapered roller bearing
View full technical record →TIMKEN15123 / 15245
Tapered roller bearing
View full technical record →SKF15123/15245
Single row tapered roller bearing
View full technical record →SKF15123/15245/VA983
Special single row tapered roller bearing
View full technical record →TIMKEN15123 / 15249
Tapered roller bearing
View full technical record →TIMKEN15123 / 15250
Tapered roller bearing
View full technical record →TIMKEN15123 / 15250B
Tapered roller bearing
View full technical record →TIMKEN15123 / 15250X
Tapered roller bearing
View full technical record →KOYO15123/245
Tapered roller bearing
View full technical record →TIMKEN15123-90086
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.