25580 bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with 25580. The table retains complete manufacturer designations so special suffixes and different dimensional variants remain visible.
On this page7 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 25580 — individual cone dimensions
TIMKEN 25580 is an individual tapered-roller cone: the inner ring, rollers and cage, not the complete cone-and-cup bearing. The manufacturer lists bore d = 44.450 mm (1 3/4 in) and inner-ring width B = 25.400 mm (1.0000 in).
| Measurement | Symbol | Metric | Inches |
|---|---|---|---|
| Bore (d) | d | 44.450 mm | 1 3/4 in |
| Inner Ring Width (B) | B | 25.400 mm | 1.0000 in |
| Effective Center Location | Not specified | -6.4 mm | -0.25 in |
| Shaft Backing Shoulder Diameter - Frontface (da) | da | 50 mm | 1.97 in |
| Shaft Backing Shoulder Diameter - Backface (db) | db | 57 mm | 2.24 in |
| Cage Location rel. to BF (Aa) | Aa | 0.3 mm | 0.01 in |
| Cage Location rel. to FF (Ab) | Ab | 1.5 mm | 0.06 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.
TIMKEN 25580 — bearing pairs and set identification
For TIMKEN 25580, the component number alone does not establish every dimension of a complete bearing. This reference identifies documented cone/cup combinations that contain 25580; select the row matching both of your component markings.
Complete bearing dimensions by exact pair
These TS single-row tapered-roller combinations are reproduced as factual measurements from the 2002 reference. Dimensions are not a fitment approval or a current availability claim. Each cell keeps both published units.
| Cone / cup | Bore d | Outside D | Assembly T |
|---|---|---|---|
| 25580 / 25520 | 44.450 mm 1.750 in | 82.931 mm 3.265 in | 23.812 mm 0.938 in |
Separate ring widths B / C and source page references
B and C below describe separate components. Their sum is not the assembly width T.
| Cone / cup | Cone width B | Cup width C | 2002 PDF pages |
|---|---|---|---|
| 25580 / 25520 | 25.400 mm 1.000 in | 19.050 mm 0.750 in | 234, 357 |
What to confirm before using this reference
- d is the cone bore, D is the cup outside diameter and T is the complete bearing width for the exact pair. B and C measure the separate rings; do not add B and C to calculate T.
- The dimensional table is a historical identification reference from the 2002 Timken Bearing Specification Guide, not a current engineering drawing. Printed metric and inch values are retained, including their original rounding. Check the current drawing before specifying fits or machining.
- A component may appear with several mating numbers. A match here documents that exact Timken combination; it does not approve other suffixes, mixed-brand rings, a vehicle application or a substitute with similar dimensions.
- A cone-and-cup set is not automatically a complete wheel-end repair kit. Seal numbers, collars, spacers and quantities must be confirmed separately unless the specific set note below explicitly lists them.
- For replacement work, inspect and replace the mating cup and cone together as specified for the assembly. Retaining a worn ring or mixing manufacturer geometries can change the contact pattern even when nominal diameters match.
- An axle tightening torque, preload or endplay target cannot be derived from these dimensions. Use the procedure for the identified hub or machine, including any pre-adjusted system restrictions.
Manufacturer references: Timken Bearing Specification Guide, Order 7534 (2002, archived distributor-hosted copy); Timken MileMate set chart, Order 5523 (May 2024), where listed; Timken cup-and-cone replacement guidance, Order 10832 (2016). Sources checked 2026-10-02. Measurement rows and set identities are kept separate by edition. BearingScope provides independent identification guidance, not sales or installation certification.
25580 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. 23 recorded variants are listed. A dash means the value is missing, not zero.
Read the original dimensions for 25580
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 25580 / 25520 — 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 25580 and cup 25520. 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, Housing Backing Shoulder Dia. - Frontface (Da). 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 | 44.450 mm / 1 3/4 in |
| O.D. (D) | D | 82.931 mm / 3.2650 in |
| Width (T) | T | 23.813 mm / 0.9375 in |
| Inner Ring Width (B) | B | 25.400 mm / 1.0000 in |
| Outer Ring Width (C) | C | 19.050 mm / 0.75 in |
| Effective Center Location | Not supplied separately | -6.4 mm / -0.25 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 | 0.76 mm / 0.03 in |
| Shaft Backing Shoulder Dia. - Frontface (da) | da | 50 mm / 1.97 in |
| Shaft Backing Shoulder Dia. - Backface (db) | db | 57 mm / 2.24 in |
| Housing Backing Shoulder Dia. - Frontface (Da) | Da | 77.00 mm / 3.05 in — source units differ; verify before use |
| Housing Backing Shoulder Dia. - Backface (Db) | Db | 73.91 mm / 2.91 in |
| Cage Location rel. to BF (Aa) | Aa | 0.3 mm / 0.01 in |
| Cage Location rel. to FF (Ab) | Ab | 1.5 mm / 0.06 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) |
|---|---|---|---|---|---|---|
| SKF25580/25520Single row tapered roller bearing |
| 99.1 kN | 106 kN | 6700 rpm | 8000 rpm | 0.56 kg560 g |
| SKF25580/25520/VA983Special single row tapered roller bearing |
| 79.9 kN | 96.5 kN | 6000 rpm | 8000 rpm | 0.56 kg560 g |
| TIMKEN25580 / 25518Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.54 kg540 g |
| TIMKEN25580 / 25519Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.55 kg550 g |
| TIMKEN25580 / 25520Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.56 kg560 g |
| TIMKEN25580 / 25521Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.56 kg560 g |
| TIMKEN25580 / 25522Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.56 kg560 g |
| TIMKEN25580 / 25523Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.6 kg600 g |
| TIMKEN25580 / 25526Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.6 kg600 g |
| TIMKEN25580 / 25527Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.65 kg650 g |
| TIMKEN25580 / 25528Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.75 kg750 g |
| TIMKEN25580 / 25547RBTapered roller bearing |
| 90.5 kN | 111 kN | — | — | 1.04 kg1040 g |
| TIMKEN25580-90018Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.56 kg560 g |
| TIMKEN25580-90021Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.56 kg560 g |
| TIMKEN25580-90091Tapered roller bearing |
| 158 kN | 221 kN | — | — | 1.24 kg1240 g |
| TIMKEN25580-90095Tapered roller bearing |
| 158 kN | 221 kN | — | — | 1.24 kg1240 g |
| TIMKEN25580-90098Tapered roller bearing |
| 158 kN | 221 kN | — | — | 1.24 kg1240 g |
| TIMKEN25580-90115Tapered roller bearing |
| 158 kN | 221 kN | — | — | 1.24 kg1240 g |
| TIMKEN25580-906A1Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.56 kg560 g |
| TIMKEN25580-99480Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.56 kg560 g |
| TIMKEN25580-99482Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.56 kg560 g |
| TIMKEN25580 / K150961Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.56 kg560 g |
| TIMKEN25580 / NP787333Tapered roller bearing |
| 90.5 kN | 111 kN | — | — | 0.56 kg560 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 25580/25520 | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| SKF 25580/25520/VA983 | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| TIMKEN 25580 / 25518 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 25580 / 25519 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580 / 25520 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580 / 25521 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580 / 25522 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580 / 25523 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580 / 25526 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 25580 / 25527 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 25580 / 25528 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 25580 / 25547RB | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 25580-90018 | Open | ABMA Class 0 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580-90021 | Open | ABMA Class 0 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580-90091 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580-90095 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580-90098 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580-90115 | Open | ABMA Class 3 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580-906A1 | Open | ABMA Class 00 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580-99480 | Open | ABMA Class 3 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580-99482 | Open | ABMA Class 3 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 25580 / K150961 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 25580 / NP787333 | 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.
25580 / 25518
Tapered roller bearing
View full technical record →TIMKEN25580 / 25519
Tapered roller bearing
View full technical record →TIMKEN25580 / 25520
Tapered roller bearing
View full technical record →SKF25580/25520
Single row tapered roller bearing
View full technical record →SKF25580/25520/VA983
Special single row tapered roller bearing
View full technical record →TIMKEN25580 / 25521
Tapered roller bearing
View full technical record →TIMKEN25580 / 25522
Tapered roller bearing
View full technical record →TIMKEN25580 / 25523
Tapered roller bearing
View full technical record →TIMKEN25580 / 25526
Tapered roller bearing
View full technical record →TIMKEN25580 / 25527
Tapered roller bearing
View full technical record →TIMKEN25580 / 25528
Tapered roller bearing
View full technical record →TIMKEN25580 / 25547RB
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.