2788 bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with 2788. 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 2788 — individual cone dimensions
TIMKEN 2788 is an individual tapered-roller cone: the inner ring, rollers and cage, not the complete cone-and-cup bearing. The manufacturer lists bore d = 38.1 mm (1 1/2 in) and inner-ring width B = 25.654 mm (1.0100 in).
| Measurement | Symbol | Metric | Inches |
|---|---|---|---|
| Bore (d) | d | 38.1 mm | 1 1/2 in |
| Inner Ring Width (B) | B | 25.654 mm | 1.0100 in |
| Effective Center Location | Not specified | -8.1 mm | -0.32 in |
| Shaft Backing Shoulder Diameter - Frontface (da) | da | 43.5 mm | 1.71 in |
| Shaft Backing Shoulder Diameter - Backface (db) | db | 50 mm | 1.97 in |
| Cage Location rel. to BF (Aa) | Aa | 1 mm | 0.04 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.
2788 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. 19 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) |
|---|---|---|---|---|---|---|
| SKF2788/2720/QCL7CSingle row tapered roller bearing |
| 74.8 kN | 93 kN | 6700 rpm | 9000 rpm | 0.51 kg510 g |
| TIMKEN2788 / 2720Tapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.5 kg500 g |
| TIMKEN2788 / 2729Tapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.51 kg510 g |
| TIMKEN2788 / 2729XTapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.51 kg510 g |
| TIMKEN2788 / 2731Tapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.56 kg560 g |
| TIMKEN2788 / 2734Tapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.58 kg580 g |
| TIMKEN2788 / 2735XTapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.45 kg450 g |
| TIMKEN2788 / 2736Tapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.48 kg480 g |
| TIMKEN2788-90014Tapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.5 kg500 g |
| TIMKEN2788-90015Tapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.51 kg510 g |
| TIMKEN2788A / 2720Tapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.5 kg500 g |
| TIMKEN2788A / 2729Tapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.51 kg510 g |
| TIMKEN2788A / 2729XTapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.51 kg510 g |
| TIMKEN2788A / 2731Tapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.56 kg560 g |
| TIMKEN2788A / 2734Tapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.58 kg580 g |
| TIMKEN2788A / 2735XTapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.45 kg450 g |
| TIMKEN2788A / 2736Tapered roller bearing |
| 86.9 kN | 102 kN | — | — | 0.48 kg480 g |
| KOYO2788R/29Tapered roller bearing |
| 92.6 kN | 92.2 kN | — | 5400 rpmLimiting Speeds(Grease Lub.): 5400 min-1Limiting Speeds(Oil Lub.): 7200 min-1 | 0.497 kg497 g |
| KOYO2788R/35XTapered roller bearing |
| 92.6 kN | 92.2 kN | — | 5400 rpmLimiting Speeds(Grease Lub.): 5400 min-1Limiting Speeds(Oil Lub.): 7200 min-1 | 0.442 kg442 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 2788/2720/QCL7C | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| TIMKEN 2788 / 2720 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 2788 / 2729 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 2788 / 2729X | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 2788 / 2731 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 2788 / 2734 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 2788 / 2735X | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 2788 / 2736 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 2788-90014 | Open | ABMA Class 0 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 2788-90015 | Open | ABMA Class 0 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 2788A / 2720 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 2788A / 2729 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 2788A / 2729X | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 2788A / 2731 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 2788A / 2734 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 2788A / 2735X | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 2788A / 2736 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| KOYO 2788R/29 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| KOYO 2788R/35X | 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.
27880/20
Tapered roller bearing
View full technical record →TIMKEN27880 / 27820
Tapered roller bearing
View full technical record →TIMKEN27880-90014
Tapered roller bearing
View full technical record →TIMKEN27880-90015
Tapered roller bearing
View full technical record →TIMKEN27880-90016
Tapered roller bearing
View full technical record →TIMKEN27880-90021
Tapered roller bearing
View full technical record →TIMKEN27880-90023
Tapered roller bearing
View full technical record →TIMKEN27880-90028
Tapered roller bearing
View full technical record →TIMKEN27880-90037
Tapered roller bearing
View full technical record →TIMKEN27880-90040
Tapered roller bearing
View full technical record →TIMKEN27880-90042
Tapered roller bearing
View full technical record →TIMKEN27880-907A1
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.