H311 bearing dimensions & suffix variants
Look up recorded dimensions for designations beginning with H311. 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.
H311 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. 7 recorded variants are listed. A dash means the value is missing, not zero.
Catalogue parameters for H311
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 H311 — 14 recorded parameters
Adapter sleeve
Reference: Schaeffler medias — FAG; source snapshot 2026-09-02.
FAG H311 connects two different nominal diameters: the sleeve bore/shaft-side diameter is 50 mm, while the bearing-side small taper diameter is 55 mm. Do not use the bearing-side number as the cylindrical shaft diameter.
The sleeve length is 45 mm; lock-nut outside diameter is 75 mm; the source gives 12.5 mm for the nut-and-locking arrangement. These dimensions belong to different parts, not to a bearing d×D×B envelope.
Calculated inch reference (shaft-side diameter × bearing-side diameter × sleeve length): 1.968504 × 2.165354 × 1.771654 in. This converts the recorded millimetres using exactly 25.4 mm/in and rounds to six decimals; it does not change the nominal series or supply machining tolerances.
Match the full sleeve, bearing bore form, nut and locking arrangement. The listed sleeve dimensions alone do not specify drive-up distance, final internal clearance or an approved tightening procedure.
Read the complete suffix and recorded construction. Similar dimensions do not prove identical seals, clearance, precision or material.
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 | d1 | 50 mm |
| Bore diameter | d1 | 1.969 in |
| Thread | G | M55x2 |
| Sleeve length | B1 | 45 mm |
| Sleeve length | B1 | 1.772 in |
| Mass | ≈m | 358.05 g |
| Mass | ≈m | 12.63 oz |
Dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Bore diameter bearing | d | 55 mm |
| Bore diameter bearing | d | 2.165 in |
| Outside diameter nut | d2 | 75 mm |
| Outside diameter nut | d2 | 2.953 in |
| Width nut and lock | B2 | 12.5 mm |
| Width nut and lock | B2 | 0.492 in |
Product characteristics
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Design | Standard | Without |
SKF H 311 — 14 recorded parameters
Adapter sleeve with KM lock nut and MB lock washer, metric dimensions
Reference: SKF product catalogue; source snapshot 2026-09-02.
SKF H 311 connects two different nominal diameters: the sleeve bore/shaft-side diameter is 50 mm, while the bearing-side small taper diameter is 55 mm. Do not use the bearing-side number as the cylindrical shaft diameter.
The sleeve length is 45 mm; lock-nut outside diameter is 75 mm; the source gives 12.5 mm for the nut-and-locking arrangement. These dimensions belong to different parts, not to a bearing d×D×B envelope.
Calculated inch reference (shaft-side diameter × bearing-side diameter × sleeve length): 1.968504 × 2.165354 × 1.771654 in. This converts the recorded millimetres using exactly 25.4 mm/in and rounds to six decimals; it does not change the nominal series or supply machining tolerances.
Match the full sleeve, bearing bore form, nut and locking arrangement. The listed sleeve dimensions alone do not specify drive-up distance, final internal clearance or an approved tightening procedure.
Read the complete suffix and recorded construction. Similar dimensions do not prove identical seals, clearance, precision or material.
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 | 50.0 mm |
| Width | Not separately recorded | 45.0 mm |
| Thread designation | Not separately recorded | M55x2 |
Properties
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Taper | Not separately recorded | 1:12 |
| Holes for oil injection | Not separately recorded | Without |
Logistics
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Product net weight | Not separately recorded | 0.33 kg |
Engineering — Dimensions
| Parameter | Source symbol | Recorded value |
|---|---|---|
| Bore diameter | d 1 | 50 mm |
| Outside diameter small taper | d | 55 mm |
| Outside diameter lock nut | d 3 | 75 mm |
| Width | B 1 | 45 mm |
| Width lock nut | B | 11 mm |
| Width lock nut including lock washer | B 4 | 12.5 mm |
| Thread | G | M55x2 |
| External taper | Not separately recorded | 1:12 |
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) |
|---|---|---|---|---|---|---|
| SKFH 311Adapter sleeve with KM lock nut and MB lock washer, metric dimensions |
| — | — | — | — | 0.33 kg330 g |
| FAGH311Adapter sleeve |
| — | — | — | — | 0.35805 kg358.05 g |
| SKFH 311 CAdapter sleeve with KM lock nut and MB .. C lock washer, metric dimensions |
| — | — | — | — | 0.33 kg330 g |
| SKFH 311 EAdapter sleeve with KMFE lock nut, metric dimensions |
| — | — | — | — | 0.33 kg330 g |
| FAGH311X114Adapter sleeve |
| — | — | — | — | 0.4196 kg419.6 g |
| FAGH311X115Adapter sleeve |
| — | — | — | — | 0.37837 kg378.37 g |
| FAGH311X200Adapter sleeve |
| — | — | — | — | 0.33598 kg335.98 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 H 311 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| FAG H311 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| SKF H 311 C | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| SKF H 311 E | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| FAG H311X114 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| FAG H311X115 | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded | Not recorded |
| FAG H311X200 | 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.
H311
Adapter sleeve
View full technical record →SKFH 311
Adapter sleeve with KM lock nut and MB lock washer, metric dimensions
View full technical record →FAGH31/1000-HG
Adapter sleeve
View full technical record →FAGH31/1060-HG
Adapter sleeve
View full technical record →FAGH31/1120-HG
Adapter sleeve
View full technical record →FAGH31/1180-HG
Adapter sleeve
View full technical record →FAGH31/1250-HG
Adapter sleeve
View full technical record →FAGH31/1320-HG
Adapter sleeve
View full technical record →FAGH31/1400-HG
Adapter sleeve
View full technical record →FAGH31/1500-HG
Adapter sleeve
View full technical record →SKFH 311 C
Adapter sleeve with KM lock nut and MB .. C lock washer, metric dimensions
View full technical record →SKFH 311 E
Adapter sleeve with KMFE lock nut, metric dimensions
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.