31315 bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with 31315. 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.
31315 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. 11 recorded variants are listed. A dash means the value is missing, not zero.
Read the original dimensions for 31315
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 31315 — 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 | 75 mm |
| Outside diameter | D | 160 mm |
| Width, inner ring | B | 37 mm |
| Width, outer ring | C | 26 mm |
| Width, total | T | 40 mm |
| Minimum chamfer dimension of inner ring back face | r1, 2 min | 3 mm |
| Minimum chamfer dimension of outer ring back face | r3, 4 min | 2.5 mm |
| Distance between the apexes of the pressure cones | a | 50 mm |
| Guidance rib diameter of inner ring | d1 | 117.6 mm |
Mounting limits and abutments
| Measurement | Source symbol | Recorded value |
|---|---|---|
| Maximum diameter of shaft shoulder | da max | 91 mm |
| Minimum diameter of shaft shoulder | db min | 87 mm |
| Minimum diameter of housing shoulder | Da min | 127 mm |
| Maximum diameter of housing shoulder | Da max | 148 mm |
| Minimum diameter of housing shoulder | Db min | 151 mm |
| Minimum axial space | Ca min | 6 mm |
| Minimum axial space | Cb min | 14 mm |
| Maximum fillet radius of shaft | ra max | 3 mm |
| Maximum fillet radius of housing | rb max | 2.5 mm |
Catalogue parameters for 31315
Choose the complete brand and marking before reading a value. These source-labelled records add dimensions, construction and engineering properties where they were recorded; a shared model number does not establish interchangeability.
Units, ranges and minimum/maximum qualifiers are retained. The data is a dated catalogue reference, not a certified drawing, a complete current specification or an operating approval.
FAG 31315 — 64 recorded parameters
Tapered roller bearing
Reference: Schaeffler medias — FAG; source snapshot 2026-09-02.
Keep total assembly width distinct from inner- and outer-ring widths. The same nominal bore does not establish a matching cup/cone set.
Values shown are retained from the recorded source. Zero boundary dimensions and zero load ratings from incomplete legacy feeds are withheld rather than presented as usable specifications.
Main Dimensions & Performance Data
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Bore diameter | d | 75 mm |
| Bore diameter | d | 2.953 in |
| Outside diameter | D | 160 mm |
| Outside diameter | D | 6.299 in |
| Width, inner ring | B | 37 mm |
| Width, inner ring | B | 1.457 in |
| Width, outer ring | C | 26 mm |
| Width, outer ring | C | 1.024 in |
| Width, total | T | 40 mm |
| Width, total | T | 1.575 in |
| Basic dynamic load rating, radial | Cr | 203,000 N |
| Basic dynamic load rating, radial | Cr | 45,638.489 lbf |
| Basic static load rating, radial | C0r | 236,000 N |
| Basic static load rating, radial | C0r | 53,057.554 lbf |
| Fatigue load limit, radial | Cur | 27,000 N |
| Fatigue load limit, radial | Cur | 6,070.144 lbf |
| Limiting speed | nG | 4,400 1/min |
| Thermal speed rating | nϑr | 3,300 1/min |
| Mass | ≈m | 3.344 kg |
| Mass | ≈m | 7.372 lbs |
Mounting dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Maximum diameter of shaft shoulder | da max | 91 mm |
| Maximum diameter of shaft shoulder | da max | 3.583 in |
| Minimum diameter of shaft shoulder | db min | 87 mm |
| Minimum diameter of shaft shoulder | db min | 3.425 in |
| Minimum diameter of housing shoulder | Da min | 127 mm |
| Minimum diameter of housing shoulder | Da min | 5 in |
| Maximum diameter of housing shoulder | Da max | 148 mm |
| Maximum diameter of housing shoulder | Da max | 5.827 in |
| Minimum diameter of housing shoulder | Db min | 151 mm |
| Minimum diameter of housing shoulder | Db min | 5.945 in |
| Minimum axial space | Ca min | 6 mm |
| Minimum axial space | Ca min | 0.236 in |
| Minimum axial space | Cb min | 14 mm |
| Minimum axial space | Cb min | 0.551 in |
| Maximum fillet radius of shaft | ra max | 3 mm |
| Maximum fillet radius of shaft | ra max | 0.118 in |
| Maximum fillet radius of housing | rb max | 2.5 mm |
| Maximum fillet radius of housing | rb max | 0.098 in |
Dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Minimum chamfer dimension of inner ring back face | r1, 2 min | 3 mm |
| Minimum chamfer dimension of inner ring back face | r1, 2 min | 0.118 in |
| Minimum chamfer dimension of outer ring back face | r3, 4 min | 2.5 mm |
| Minimum chamfer dimension of outer ring back face | r3, 4 min | 0.098 in |
| Distance between the apexes of the pressure cones | a | 50 mm |
| Distance between the apexes of the pressure cones | a | 1.969 in |
| Guidance rib diameter of inner ring | d1 | 117.6 mm |
| Guidance rib diameter of inner ring | d1 | 4.63 in |
Temperature range
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Operating temperature min. | Tmin | -30 °C |
| Operating temperature min. | Tmin | -22 °F |
| Operating temperature max. | Tmax | 120 °C |
| Operating temperature max. | Tmax | 248 °F |
Calculation factors
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Limiting value of Fa/Fr for the applicability of diff. Values of factors X and Y | e | 0.83 |
| Dynamic axial load factor | Y | 0.73 |
| Static axial load factor | Y0 | 0.4 |
Product characteristics
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Tolerance class | PN | Normal (ISO 492:2023) |
| Heat treatment | Not separately recorded | Standard |
| Cage | Standard | Sheet steel cage, window cage, roller-guided |
| Internal design | Not separately recorded | Standard |
| Quality level | Not separately recorded | Standard |
| Number of rows | 1 | Single-row design |
Capabilities & suitability
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Radial load capacity | Not separately recorded | Yes |
| Axial load capacity in one direction | Not separately recorded | Yes |
| Suitable for grease lubrication | Not separately recorded | Yes |
| Suitable for oil lubrication | Not separately recorded | Yes |
| Unsealed design | Not separately recorded | Yes |
SKF 31315 — 52 recorded parameters
Single row tapered roller bearing
Reference: SKF product catalogue; source snapshot 2026-09-02.
Keep total assembly width distinct from inner- and outer-ring widths. The same nominal bore does not establish a matching cup/cone set.
Values shown are retained from the recorded source. Zero boundary dimensions and zero load ratings from incomplete legacy feeds are withheld rather than presented as usable specifications.
Dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Bore diameter | Not separately recorded | 75.0 mm |
| Outside diameter | Not separately recorded | 160.0 mm |
| Width, total | Not separately recorded | 40.0 mm |
| Width, inner ring | Not separately recorded | 37.0 mm |
| Width, outer ring | Not separately recorded | 26.0 mm |
| Contact angle | Not separately recorded | 28.8 ° |
Performance
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Basic dynamic load rating | Not separately recorded | 255.0 kN |
| Basic static load rating | Not separately recorded | 245.0 kN |
| Reference speed | Not separately recorded | 3200.0 r/min |
| Limiting speed | Not separately recorded | 4300.0 r/min |
| SKF performance class | Not separately recorded | SKF Explorer |
Properties
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Bearing part | Not separately recorded | Complete bearing |
| Number of rows | Not separately recorded | 1 |
| Locating feature, bearing outer ring | Not separately recorded | Without |
| Bore type | Not separately recorded | Cylindrical |
| Cage | Not separately recorded | Sheet metal |
| Arrangement of contact angle (double-row bearing) | Not separately recorded | Not applicable |
| Matched arrangement | Not separately recorded | No |
| Coating | Not separately recorded | Without |
| Sealing | Not separately recorded | Without |
| Relubrication feature | Not separately recorded | Without |
| Unit system | Not separately recorded | Metric |
| Indicative carbon footprint for new product | Not separately recorded | 12.6 kg CO 2 e |
Logistics
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Product net weight | Not separately recorded | 3.4 kg |
Engineering — Engineering specifications
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Dimension series | Not separately recorded | 7GB |
Engineering — Dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Bore diameter | d | 75 mm |
| Outside diameter | D | 160 mm |
| Bearing width, total | T | 40 mm |
| Shoulder diameter of inner ring | d 1 | ≈ 118 mm |
| Width of inner ring | B | 37 mm |
| Width of outer ring | C | 26 mm |
| Chamfer dimension of inner ring | r 1,2 | min. 3 mm |
| Chamfer dimension of outer ring | r 3,4 | min. 2.5 mm |
| Distance side face to pressure point | a | 48.1 mm |
Engineering — Abutment dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Diameter of shaft abutment | d a | max. 91 mm |
| Diameter of shaft abutment | d b | min. 88 mm |
| Diameter of housing abutment | D a | min. 127 mm |
| Diameter of housing abutment | D a | max. 149 mm |
| Diameter of housing abutment | D b | min. 151 mm |
| Minimum width of space required in housing on large side face | C a | min. 5 mm |
| Minimum width of space required in housing on small side face | C b | min. 14 mm |
| Radius of shaft fillet | r a | max. 3 mm |
| Radius of housing fillet | r b | max. 2.5 mm |
Engineering — Calculation data
| Parameter | Source symbol | Recorded value |
|---|---|---|
| SKF performance class | Not separately recorded | SKF Explorer |
| Basic dynamic load rating | C | 255 kN |
| Basic static load rating | C 0 | 245 kN |
| Fatigue load limit | P u | 29 kN |
| Reference speed | Not separately recorded | 3200 r/min |
| Limiting speed | Not separately recorded | 4300 r/min |
| Limiting value | e | 0.83 |
| Calculation factor | Y | 0.72 |
| Calculation factor | Y 0 | 0.4 |
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) |
|---|---|---|---|---|---|---|
| SKF31315Single row tapered roller bearing |
| 255 kN | 245 kN | 3200 rpm | 4300 rpm | 3.4 kg3400 g |
| FAG31315Tapered roller bearing |
| 203 kN | 236 kN | 3300 rpm | 4400 rpm | 3.344 kg3344 g |
| TIMKEN31315Tapered roller bearing |
| 294 kN | 278 kN | — | — | 3.48 kg3480 g |
| SKF31315/CL7CDFMatched tapered roller bearings arranged face-to-face |
| 438 kN | 490 kN | 2400 rpm | 4300 rpm | 7.17 kg7170 g |
| SKF31315/CL7CDFC125Matched tapered roller bearings arranged face-to-face |
| 438 kN | 490 kN | 2400 rpm | 4300 rpm | 7.2 kg7200 g |
| SKF31315/DFMatched tapered roller bearings arranged face-to-face |
| 438 kN | 490 kN | 2400 rpm | 4300 rpm | 7.17 kg7170 g |
| FAG31315-HTapered roller bearing |
| 193 kN | 236 kN | 3300 rpm | 3520 rpm | 3.357 kg3357 g |
| FAG31315-XLTapered roller bearing |
| 250 kN | 236 kN | 3300 rpm | 5300 rpm | 3.345 kg3345 g |
| FAG31315-XL>ATapered roller bearing |
| 250 kN | 236 kN | 3300 rpm | 5300 rpm | 3.45 kg3450 g |
| FAG31315-XL>BTapered roller bearing |
| 250 kN | 236 kN | 3300 rpm | 5300 rpm | 3.4 kg3400 g |
| FAG31315-XL-DF-A0-35Tapered roller bearing set |
| 430 kN | 475 kN | 3150 rpm | 5300 rpm | 8.01 kg8010 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 31315 | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| FAG 31315 | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | Not recorded | Not recorded |
| TIMKEN 31315 | Open | ABMA Class K | Not recorded | Steel cage | Not recorded | Not recorded |
| SKF 31315/CL7CDF | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| SKF 31315/CL7CDFC125 | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| SKF 31315/DF | Without | Not recorded | Not recorded | Sheet metal | Not recorded | None |
| FAG 31315-H | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | Not recorded | Not recorded |
| FAG 31315-XL | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | Not recorded | Not recorded |
| FAG 31315-XL>A | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | Not recorded | Not recorded |
| FAG 31315-XL>B | Not recorded | PN — Normal (ISO 492:2023) | Not recorded | Standard — Sheet steel cage, window cage, roller-guided | Not recorded | Not recorded |
| FAG 31315-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.
31315
Tapered roller bearing
View full technical record →TIMKEN31315
Tapered roller bearing
View full technical record →SKF31315
Single row tapered roller bearing
View full technical record →SKF31315/CL7CDF
Matched tapered roller bearings arranged face-to-face
View full technical record →SKF31315/CL7CDFC125
Matched tapered roller bearings arranged face-to-face
View full technical record →SKF31315/DF
Matched tapered roller bearings arranged face-to-face
View full technical record →FAG31315-H
Tapered roller bearing
View full technical record →FAG31315-XL
Tapered roller bearing
View full technical record →FAG31315-XL>A
Tapered roller bearing
View full technical record →FAG31315-XL>B
Tapered roller bearing
View full technical record →FAG31315-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.