749 bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with 749. 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 749 — individual cone dimensions
TIMKEN 749 is an individual tapered-roller cone: the inner ring, rollers and cage, not the complete cone-and-cup bearing. The manufacturer lists bore d = 85.027 mm (3.3475 in) and inner-ring width B = 46.673 mm (1.8375 in).
| Measurement | Symbol | Metric | Inches |
|---|---|---|---|
| Bore (d) | d | 85.027 mm | 3.3475 in |
| Inner Ring Width (B) | B | 46.673 mm | 1.8375 in |
| Effective Center Location | Not specified | -11.9 mm | -0.47 in |
| Shaft Backing Shoulder Diameter - Frontface (da) | da | 95 mm | 3.74 in |
| Shaft Backing Shoulder Diameter - Backface (db) | db | 101 mm | 3.98 in |
| Cage Location rel. to BF (Aa) | Aa | 1.3 mm | 0.05 in |
| Cage Location rel. to FF (Ab) | Ab | 2 mm | 0.08 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 749 — bearing pairs and set identification
For TIMKEN 749, the component number alone does not establish every dimension of a complete bearing. This reference identifies documented cone/cup combinations that contain 749; 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 |
|---|---|---|---|
| 749 / 742 | 85.026 mm 3.348 in | 150.089 mm 5.909 in | 44.450 mm 1.750 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 |
|---|---|---|---|
| 749 / 742 | 46.672 mm 1.838 in | 36.512 mm 1.438 in | 276, 326 |
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.
749 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. 28 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) |
|---|---|---|---|---|---|---|
| SKF749 A/742Single row tapered roller bearing |
| 351 kN | 405 kN | 3600 rpm | 4300 rpm | 3.41 kg3410 g |
| TIMKEN749 / 742Tapered roller bearing |
| 377 kN | 417 kN | — | — | 3.25 kg3250 g |
| TIMKEN749 / 742ATapered roller bearing |
| 377 kN | 417 kN | — | — | 3.22 kg3220 g |
| TIMKEN749-90035Tapered roller bearing |
| 656 kN | 835 kN | — | — | 7.89 kg7890 g |
| TIMKEN749-90036Tapered roller bearing |
| 656 kN | 835 kN | — | — | 7.87 kg7870 g |
| TIMKEN749-90037Tapered roller bearing |
| 377 kN | 417 kN | — | — | 3.2 kg3200 g |
| TIMKEN749-90091Tapered roller bearing |
| 656 kN | 835 kN | — | — | 7.89 kg7890 g |
| TIMKEN749-90099Tapered roller bearing |
| 656 kN | 835 kN | — | — | 7.89 kg7890 g |
| TIMKEN749-90112Tapered roller bearing |
| 656 kN | 835 kN | — | — | 7.89 kg7890 g |
| TIMKEN749A / 742Tapered roller bearing |
| 377 kN | 417 kN | — | — | 3.37 kg3370 g |
| TIMKEN749A / 742ATapered roller bearing |
| 377 kN | 417 kN | — | — | 3.34 kg3340 g |
| TIMKEN749A / 743Tapered roller bearing |
| 377 kN | 417 kN | — | — | 3.32 kg3320 g |
| TIMKEN749A-90030Tapered roller bearing |
| 656 kN | 835 kN | — | — | 8.13 kg8130 g |
| TIMKEN749A-90039Tapered roller bearing |
| 656 kN | 835 kN | — | — | 8.14 kg8140 g |
| TIMKEN749A-90040Tapered roller bearing |
| 656 kN | 835 kN | — | — | 8.14 kg8140 g |
| TIMKEN749A-90041Tapered roller bearing |
| 656 kN | 835 kN | — | — | 8.14 kg8140 g |
| TIMKEN749A-90068Tapered roller bearing |
| 656 kN | 835 kN | — | — | 8.14 kg8140 g |
| TIMKEN749A-90070Tapered roller bearing |
| 656 kN | 835 kN | — | — | 8.14 kg8140 g |
| TIMKEN749A-90081Tapered roller bearing |
| 656 kN | 835 kN | — | — | 8.13 kg8130 g |
| TIMKEN749A-90107Tapered roller bearing |
| 656 kN | 835 kN | — | — | 8.13 kg8130 g |
| TIMKEN749A-99407Tapered roller bearing |
| 656 kN | 835 kN | — | — | 8.06 kg8060 g |
| TIMKEN749S / 742Tapered roller bearing |
| 377 kN | 417 kN | — | — | 3.24 kg3240 g |
| TIMKEN749-S / 742ATapered roller bearing |
| 377 kN | 417 kN | — | — | 3.21 kg3210 g |
| TIMKEN749-S / 743Tapered roller bearing |
| 377 kN | 417 kN | — | — | 3.19 kg3190 g |
| TIMKEN749S-90051Tapered roller bearing |
| 656 kN | 835 kN | — | — | 7.88 kg7880 g |
| KOYO749AR/742Tapered roller bearing |
| 330 kN | 368 kN | — | 2500 rpmLimiting Speeds(Grease Lub.): 2500 min-1Limiting Speeds(Oil Lub.): 3400 min-1 | 3.29 kg3290 g |
| KOYO749R/742Tapered roller bearing |
| 330 kN | 368 kN | — | 2500 rpmLimiting Speeds(Grease Lub.): 2500 min-1Limiting Speeds(Oil Lub.): 3400 min-1 | 3.18 kg3180 g |
| KOYO749SR/742Tapered roller bearing |
| 330 kN | 368 kN | — | 2500 rpmLimiting Speeds(Grease Lub.): 2500 min-1Limiting Speeds(Oil Lub.): 3400 min-1 | 3.14 kg3140 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 749 A/742 | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| TIMKEN 749 / 742 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749 / 742A | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 749-90035 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749-90036 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749-90037 | Open | ABMA Class 0 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749-90091 | Open | ABMA Class 3 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749-90099 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749-90112 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749A / 742 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749A / 742A | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 749A / 743 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 749A-90030 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749A-90039 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749A-90040 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749A-90041 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749A-90068 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749A-90070 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749A-90081 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749A-90107 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749A-99407 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749S / 742 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 749-S / 742A | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 749-S / 743 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 749S-90051 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| KOYO 749AR/742 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| KOYO 749R/742 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| KOYO 749SR/742 | 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.
749 / 742
Tapered roller bearing
View full technical record →TIMKEN749 / 742A
Tapered roller bearing
View full technical record →TIMKEN749-90035
Tapered roller bearing
View full technical record →TIMKEN749-90036
Tapered roller bearing
View full technical record →TIMKEN749-90037
Tapered roller bearing
View full technical record →TIMKEN749-90091
Tapered roller bearing
View full technical record →TIMKEN749-90099
Tapered roller bearing
View full technical record →TIMKEN749-90112
Tapered roller bearing
View full technical record →TIMKEN749A / 742
Tapered roller bearing
View full technical record →SKF749 A/742
Single row tapered roller bearing
View full technical record →TIMKEN749A / 742A
Tapered roller bearing
View full technical record →TIMKEN749A / 743
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.