15101-15245 bearing: complete specifications & equivalents
The 15101-15245 is a ISO 355 radial bearing sized 25.4 x 62 x 19.05 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 25.4 mm |
| Outer diameter D | 62 mm |
| Width B | 19.05 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 59.5 kN |
| Basic static load rating C0 | 57 kN |
| Fatigue load limit Pu | 6.2 kN |
| Reference speed (thermal) | 9000 rpm |
| Limiting speed (mechanical) | 11000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 300 g |
| Manufacturer designation | SKF 15101/15245 |
| Standard | ISO 355 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB |
| Last verified | 2026-09-28 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB) · extracted 2026-09-28
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & 15000-series range
| Bore d | 1 in |
|---|---|
| Outer diameter D | 2.441 in |
| Width B | 0.75 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 18.3 mm |
| Smallest bore in 15000-series | 25.4 mm |
| Largest outer diameter in 15000-series | 62 mm |
| Width range across 15000-series | 18.161–19.05 mm |
| Bore position in 15000-series (smallest first) | 1 of 2 |
| Bore above smallest 15000-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 15101-15243 | NTN | partial Main dimensions match; tolerances, seals or internal clearance differ. | Same 25.4×62×19.05 mm envelope per ISO 15; catalogue load ratings differ by >10% — re-rate the application before substituting. |
| 15101-15245 | Timken | full Dimensions and internal design equivalent — standard interchange. | Same inch-series cone/cup boundary envelope (d/D/T); load ratings and speed limits are brand-specific and may differ. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the 15101-15245 model number is decoded
Operating context for the 25.4 mm bore: a shaft of this diameter in the medium-bore band typically runs between 20320 and 30480 r/min in real machinery, and the 62 mm outside diameter places the housing shoulder at 70 mm outer abutment; the 19.05 mm width and 300 g mass together set the shaft critical speed and the housing resonance check for this 15100-series envelope. The cup reference 15245 is structural, not a suffix: it identifies the outer ring that, combined with the 15101 cone, produces the 25.4/62/19.05 mm envelope catalogue-listed as 15101. Quote the cup number in full when ordering — the 15000-series tables contain other cups that fit the same cone but change the bearing.The SKF 15101/15245 is a 25.4×62×19.05 mm single-row tapered roller bearing — an inch-series entry with an asymmetric raceway cut for thrust capacity and separable mounting.The code breaks down as cone/cup: the numbers before and after the slash identify the inner and outer ring sets, and the series prefix (15000-series) ties the pair to a specific boundary plan. Dimensions 25.4×62×19.05 mm are the converted metric envelope. In SKF suffix language a bare 15101 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. Catalogue mass 300 g for the 25.4×62×19.05 mm open execution covers the pressed-steel cage and standard roller complement; sealed or special-clearance variants differ slightly in mass and carry their own order numbers. Note the minimum-axial-load requirement: at light radial load and high speed the rollers of 15101 must still be held into the rib contact, which is another reason the catalogue recommends paired mounting with controlled setting.
Typical equipment & failure modes
Common applications
- axle-boxes in material-handling equipment
- automotive and light-truck wheel hubs
- industrial gearbox shafts and reducers
- differential and pinion drives
Known failure patterns
- cup or cone misalignment when the separable rings are not seated square during mounting
- loose cup rotation in the housing when the specified press fit is not achieved
- false brinelling on idle paired sets exposed to machine vibration
- thermal preload runaway in an O-arrangement pair when inner-ring heat expands the setting
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- hard-particle indentation of the tapered raceway in unfiltered oil
Selection pitfalls — read before you substitute
- On this 25.4 mm bore, interference and temperature rise consume clearance inside a preloaded pair; calculate the residual clearance after mounting and at operating temperature — an over-tight 15101 pair heats, loses setting control and smears the roller-rib contact.
- The 15000-series inch series at 25.4 mm bore (62×19.05 mm) follows the Timken cone/cup convention; substitutions must match both the cone and cup reference exactly — interchanging with another series or a metric 3xxxx bearing of the same bore changes OD, width and contact angle, so re-run the pair setting and shoulder-diameter checks before swapping.
- Setting is a design value, not an assembly feel: excessive preload in the 15101 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
- A single 15101 cannot locate the shaft axially in both directions; mounting it singly on a reversing-thrust shaft leaves one direction uncontrolled — always use an O or X matched pair for bidirectional location.
- The pressed-steel cage is rated for standard industrial service; sustained running above the limiting speed or with degraded lubricant wears the cage pockets — inspect the cage at every relubrication interval.
- The 59.5/57 kN ratings are SKF catalogue 17000 values for the basic execution; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification and re-verify for critical drives.
- SKF lists several executions of 15101 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF 15101/15245 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
What shaft and housing fits suit 15101?
For a rotating shaft under normal load, seat the cone on a k5 shaft fit; the cup is usually a loose-to-transition fit in the housing so it can creep slightly and distribute wear. Chamfer and shoulder diameters must clear the bearing rings so the 19.05 mm-wide cup seats square; the mounting setting (end play or preload) is set by the axial position of the cup relative to the cone.
Is 15101 interchangeable with other brands?
Inch-series tapered roller bearings follow a long-standing industry boundary plan, so cones and cups of the same basic number are generally dimensionally interchangeable across manufacturers. However, internal geometry, cage design and load ratings differ by brand, so for paired or precision applications keep both halves of the set from one manufacturer — or re-verify ratings and setting when mixing.
What are the dimensions and catalogue data of 15101?
The SKF 15101/15245 is a single-row tapered roller bearing with 25.4 mm bore, 62 mm outer diameter and 19.05 mm width (1 × 2.441 × 0.75 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 59.5 kN, C0 57 kN, fatigue load limit Pu 6.2 kN, reference speed 9,000 r/min, limiting speed 11,000 r/min, mass about 300 g. It is an open, separable bearing with a pressed-steel cage.
How does the 15101 inch-series designation work?
Inch-series tapered roller bearings use a Timken-style cone/cup convention: the number before the slash identifies the cone (inner ring with roller and cage assembly), the number after the slash identifies the cup (outer ring), and the 15000-series code marks the dimensional series. The metric dimensions 25.4×62×19.05 mm are the converted equivalents of the original inch boundary dimensions.
What do the cone and cup numbers in 15101 mean?
The cone number (before the slash) identifies the inner ring, rollers and cage; the cup number (after the slash) identifies the outer ring. Both are quoted together because a single-row tapered roller bearing is a matched separable pair — the cone and cup are ground to work together and are not interchangeable with arbitrary other parts. The series prefix (15000-series) groups sizes that share the same boundary-dimension plan.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB on 2026-09-28. Read our editorial & correction policy.