31317 bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with 31317. 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.
31317 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. 9 recorded variants are listed. A dash means the value is missing, not zero.
Read the original dimensions for 31317
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.
FAG 31317 — 18 dimension fields
Tapered roller bearing. Source: Schaeffler medias — FAG; recorded snapshot 2026-09-02.
For a tapered bearing, total assembly width T, inner-ring width B and outer-ring width C are different measurements. Keep the complete cup/cone or matched assembly designation; do not replace T with B when checking available axial space.
Minimum and maximum mounting dimensions are limits, not nominal bearing dimensions. Check shaft/housing shoulders and fillets against the current drawing before designing a seat.
Bearing and component measurements
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Bore diameter | d | 85 mm |
| Outside diameter | D | 180 mm |
| Width, inner ring | B | 41 mm |
| Width, outer ring | C | 28 mm |
| Width, total | T | 44.5 mm |
| Minimum chamfer dimension of inner ring back face | r1, 2 min | 4 mm |
| Minimum chamfer dimension of outer ring back face | r3, 4 min | 3 mm |
| Distance between the apexes of the pressure cones | a | 56 mm |
| Guidance rib diameter of inner ring | d1 | 129.3 mm |
Mounting limits and abutments
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Maximum diameter of shaft shoulder | da max | 103 mm |
| Minimum diameter of shaft shoulder | db min | 99 mm |
| Minimum diameter of housing shoulder | Da min | 143 mm |
| Maximum diameter of housing shoulder | Da max | 166 mm |
| Minimum diameter of housing shoulder | Db min | 169 mm |
| Minimum axial space | Ca min | 6 mm |
| Minimum axial space | Cb min | 16.5 mm |
| Maximum fillet radius of shaft | ra max | 4 mm |
| Maximum fillet radius of housing | rb max | 3 mm |
TIMKEN 31317 — 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 X31317M and cup Y31317M. 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.
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 | 85 mm / 3.3465 in |
| O.D. (D) | D | 180 mm / 7.0866 in |
| Width (T) | T | 44.5 mm / 1.752 in |
| Inner Ring Width (B) | B | 41 mm / 1.6142 in |
| Outer Ring Width (C) | C | 28.000 mm / 1.1024 in |
| Effective Center Location | Not supplied separately | 11.9 mm / 0.47 in |
Mounting limits and abutments
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Max Shaft Fillet Radius | Not supplied separately | 4 mm / 0.160 in |
| Max Housing Fillet Radius | Not supplied separately | 3 mm / 0.118 in |
| Shaft Backing Shoulder Dia. - Frontface (da) | da | 110 mm / 4.33 in |
| Shaft Backing Shoulder Dia. - Backface (db) | db | 120 mm / 4.72 in |
| Housing Backing Shoulder Dia. - Frontface (Da) | Da | 169 mm / 6.65 in |
| Housing Backing Shoulder Dia. - Backface (Db) | Db | 154 mm / 6.06 in |
| Cage Location rel. to BF (Aa) | Aa | 8.1 mm / 0.32 in |
| Cage Location rel. to FF (Ab) | Ab | 5.6 mm / 0.22 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) |
|---|---|---|---|---|---|---|
| SKF31317Single row tapered roller bearing |
| 297 kN | 285 kN | 2800 rpm | 3800 rpm | 4.56 kg4560 g |
| FAG31317Tapered roller bearing |
| 255 kN | 300 kN | 3000 rpm | 3900 rpm | 4.88 kg4880 g |
| TIMKEN31317Tapered roller bearing |
| 308 kN | 366 kN | — | — | 4.97 kg4970 g |
| SKF31317/DFMatched tapered roller bearings arranged face-to-face |
| 510 kN | 570 kN | 2200 rpm | 3800 rpm | 9.78 kg9780 g |
| SKF31317/DF03Matched tapered roller bearings arranged face-to-face |
| 510 kN | 570 kN | 2200 rpm | 3800 rpm | 9.99 kg9990 g |
| FAG31317-HTapered roller bearing |
| 242 kN | 300 kN | 3000 rpm | 3120 rpm | 4.88 kg4880 g |
| FAG31317-XLTapered roller bearing |
| 315 kN | 300 kN | 3000 rpm | 4700 rpm | 4.682 kg4682 g |
| FAG31317-XL>ATapered roller bearing |
| 315 kN | 300 kN | 3000 rpm | 4700 rpm | 4.73 kg4730 g |
| FAG31317-XL-DF-A0-35Tapered roller bearing set |
| 540 kN | 600 kN | 2750 rpm | 4700 rpm | 10.4 kg10400 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 31317 | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| FAG 31317 | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | Not recorded | Not recorded |
| TIMKEN 31317 | Open | ABMA Class K | Not recorded | Steel cage | Not recorded | Not recorded |
| SKF 31317/DF | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| SKF 31317/DF03 | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| FAG 31317-H | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | Not recorded | Not recorded |
| FAG 31317-XL | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | Not recorded | Not recorded |
| FAG 31317-XL>A | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | Not recorded | Not recorded |
| FAG 31317-XL-DF-A0-35 | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | 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.
31317
Tapered roller bearing
View full technical record →TIMKEN31317
Tapered roller bearing
View full technical record →SKF31317
Single row tapered roller bearing
View full technical record →SKF31317/DF
Matched tapered roller bearings arranged face-to-face
View full technical record →SKF31317/DF03
Matched tapered roller bearings arranged face-to-face
View full technical record →FAG31317-H
Tapered roller bearing
View full technical record →FAG31317-XL
Tapered roller bearing
View full technical record →FAG31317-XL>A
Tapered roller bearing
View full technical record →FAG31317-XL-DF-A0-35
Tapered roller bearing set
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.