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399A bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with 399A. The table retains complete manufacturer designations so special suffixes and different dimensional variants remain visible.
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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 399A — individual cone dimensions
TIMKEN 399A is an individual tapered-roller cone: the inner ring, rollers and cage, not the complete cone-and-cup bearing. The manufacturer lists bore d = 68.263 mm (2 11/16 in) and inner-ring width B = 21.996 mm (0.8660 in).
| Measurement | Symbol | Metric | Inches |
|---|---|---|---|
| Bore (d) | d | 68.263 mm | 2 11/16 in |
| Inner Ring Width (B) | B | 21.996 mm | 0.8660 in |
| Effective Center Location | Not specified | -0.8 mm | -0.03 in |
| Max Shaft Fillet Radius | Not specified | 2.3 mm | 0.09 in |
| Shaft Backing Shoulder Diameter - Frontface (da) | da | 74 mm | 2.91 in |
| Shaft Backing Shoulder Diameter - Backface (db) | db | 78 mm | 3.07 in |
| Cage Location rel. to BF (Aa) | Aa | 1.3 mm | 0.05 in |
| Cage Location rel. to FF (Ab) | Ab | 2.8 mm | 0.11 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.
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.
399A 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. 37 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) |
|---|---|---|---|---|---|---|
| TIMKEN399A / 393Tapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.88 kg880 g |
| TIMKEN399A / 393ASTapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.78 kg780 g |
| TIMKEN399A / 394Tapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.77 kg770 g |
| TIMKEN399A / 394ATapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.75 kg750 g |
| TIMKEN399A / 394ASTapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.75 kg750 g |
| TIMKEN399A / 394CSTapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.84 kg840 g |
| TIMKEN399A / 394XSTapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.77 kg770 g |
| TIMKEN399A-90102Tapered roller bearing |
| 172 kN | 250 kN | — | — | 1.69 kg1690 g |
| TIMKEN399A-90112Tapered roller bearing |
| 172 kN | 250 kN | — | — | 1.69 kg1690 g |
| TIMKEN399A-90176Tapered roller bearing |
| 172 kN | 250 kN | — | — | 1.69 kg1690 g |
| TIMKEN399A-90187Tapered roller bearing |
| 172 kN | 250 kN | — | — | 1.69 kg1690 g |
| TIMKEN399A-90196Tapered roller bearing |
| 172 kN | 250 kN | — | — | 1.69 kg1690 g |
| TIMKEN399A-90215Tapered roller bearing |
| 172 kN | 250 kN | — | — | 1.69 kg1690 g |
| TIMKEN399A-90234Tapered roller bearing |
| 172 kN | 250 kN | — | — | 1.69 kg1690 g |
| TIMKEN399A-90252Tapered roller bearing |
| 172 kN | 250 kN | — | — | 1.69 kg1690 g |
| TIMKEN399A-90315Tapered roller bearing |
| 172 kN | 250 kN | — | — | 1.69 kg1690 g |
| TIMKEN399A-99303Tapered roller bearing |
| 172 kN | 250 kN | — | — | 1.64 kg1640 g |
| TIMKEN399AS / 393Tapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.87 kg870 g |
| TIMKEN399AS / 393ASTapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.77 kg770 g |
| TIMKEN399AS / 394Tapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.76 kg760 g |
| TIMKEN399AS / 394ATapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.74 kg740 g |
| TIMKEN399AS / 394ASTapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.74 kg740 g |
| TIMKEN399AS / 394CSTapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.83 kg830 g |
| TIMKEN399AS / 394XSTapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.76 kg760 g |
| TIMKEN399AS-90106Tapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.78 kg780 g |
| TIMKEN399AS-90115Tapered roller bearing |
| 172 kN | 250 kN | — | — | 1.67 kg1670 g |
| TIMKEN399AS-90263Tapered roller bearing |
| 172 kN | 250 kN | — | — | 1.67 kg1670 g |
| TIMKEN399AS-90276Tapered roller bearing |
| 172 kN | 250 kN | — | — | 1.67 kg1670 g |
| TIMKEN399AS / NP016656Tapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.74 kg740 g |
| TIMKEN399AX / 393Tapered roller bearing |
| 98.9 kN | 125 kN | — | — | 1.08 kg1080 g |
| TIMKEN399AX / 393ASTapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.98 kg980 g |
| TIMKEN399AX / 394Tapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.97 kg970 g |
| TIMKEN399AX / 394ASTapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.95 kg950 g |
| TIMKEN399AX / 394CSTapered roller bearing |
| 98.9 kN | 125 kN | — | — | 1.04 kg1040 g |
| TIMKEN399AX / 394XSTapered roller bearing |
| 98.9 kN | 125 kN | — | — | 0.97 kg970 g |
| KOYO399A/394ATapered roller bearing |
| 109 kN | 116 kN | — | 3400 rpmLimiting Speeds(Grease Lub.): 3400 min-1Limiting Speeds(Oil Lub.): 4500 min-1 | 0.752 kg752 g |
| KOYO399AS/394ATapered roller bearing |
| 109 kN | 116 kN | — | 3400 rpmLimiting Speeds(Grease Lub.): 3400 min-1Limiting Speeds(Oil Lub.): 4500 min-1 | 0.744 kg744 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 |
|---|---|---|---|---|---|---|
| TIMKEN 399A / 393 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399A / 393AS | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399A / 394 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399A / 394A | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399A / 394AS | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399A / 394CS | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399A / 394XS | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399A-90102 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399A-90112 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399A-90176 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399A-90187 | Open | ABMA Class 3 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399A-90196 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399A-90215 | Open | ABMA Class 3 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399A-90234 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399A-90252 | Open | ABMA Class 3 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399A-90315 | Open | ABMA Class 3 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399A-99303 | Open | ABMA Class 3 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399AS / 393 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399AS / 393AS | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399AS / 394 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399AS / 394A | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399AS / 394AS | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399AS / 394CS | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399AS / 394XS | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399AS-90106 | Open | ABMA Class 0 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399AS-90115 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399AS-90263 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399AS-90276 | Open | ABMA Class 2 | Not recorded | Steel cage | Not recorded | Not recorded |
| TIMKEN 399AS / NP016656 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399AX / 393 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399AX / 393AS | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399AX / 394 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399AX / 394AS | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399AX / 394CS | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| TIMKEN 399AX / 394XS | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| KOYO 399A/394A | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| KOYO 399AS/394A | 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.
TIMKEN
399A / 393
Tapered roller bearing
View full technical record →TIMKEN399A / 393AS
Tapered roller bearing
View full technical record →TIMKEN399A / 394
Tapered roller bearing
View full technical record →TIMKEN399A / 394A
Tapered roller bearing
View full technical record →KOYO399A/394A
Tapered roller bearing
View full technical record →TIMKEN399A / 394AS
Tapered roller bearing
View full technical record →TIMKEN399A / 394CS
Tapered roller bearing
View full technical record →TIMKEN399A / 394XS
Tapered roller bearing
View full technical record →TIMKEN399A-90102
Tapered roller bearing
View full technical record →TIMKEN399A-90112
Tapered roller bearing
View full technical record →TIMKEN399A-90176
Tapered roller bearing
View full technical record →TIMKEN399A-90187
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.