HH224334-310 bearing: complete specifications & equivalents
The HH224334-310 is a ISO 355 radial bearing sized 99.975 x 212.725 x 66.675 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 99.975 mm |
| Outer diameter D | 212.725 mm |
| Width B | 66.675 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 619 kN |
| Basic static load rating C0 | 830 kN |
| Fatigue load limit Pu | 88 kN |
| Reference speed (thermal) | 2200 rpm |
| Limiting speed (mechanical) | 3000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 11500 g |
| Manufacturer designation | SKF HH 224334/310 |
| Standard | ISO 355 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB |
| Last verified | 2026-09-28 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB) · extracted 2026-09-28
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & HH224300-series range
| Bore d | 3.936 in |
|---|---|
| Outer diameter D | 8.375 in |
| Width B | 2.625 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 56.4 mm |
| Smallest bore in HH224300-series | 99.975 mm |
| Largest outer diameter in HH224300-series | 212.725 mm |
| Width range across HH224300-series | 66.675–66.675 mm |
| Bore position in HH224300-series (smallest first) | 1 of 4 |
| Bore above smallest HH224300-series size | 0 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| HH224334-HH224310 | NTN | full Dimensions and internal design equivalent — standard interchange. | Identical ISO 15 envelope, seal and ratings band — standard interchange; re-verify precision class and clearance per supplier. |
| HH224334-310 | Timken | full Dimensions and internal design equivalent — standard interchange. | Same inch-series cone/cup boundary envelope (d/D/T); load ratings and speed limits are brand-specific and may differ. |
Interchange levels: full standard interchange · partial verify parameters · verify manual confirmation required. Links resolve to the equivalent model's specification page where available.
How the HH224334-310 model number is decoded
The cup reference 310 is structural, not a suffix: it identifies the outer ring that, combined with the HH 224334 cone, produces the 99.975/212.725/66.675 mm envelope catalogue-listed as HH224334. Quote the cup number in full when ordering — the HH224300-series tables contain other cups that fit the same cone but change the bearing.In SKF catalogue PUB BU/P1 17000, HH224334 appears as SKF HH 224334/310: an open, single-row tapered roller bearing in the HH224300-series, supplied with a pressed-steel cage as standard.The code breaks down as cone/cup: the numbers before and after the slash identify the inner and outer ring sets, and the series prefix (HH224300-series) ties the pair to a specific boundary plan. Dimensions 99.975×212.725×66.675 mm are the converted metric envelope. In SKF suffix language a bare HH224334 is the standard execution; B marks a larger contact angle and Q or J2 mark clearance/cage variants, all quoted separately. The 88 kN Pu figure feeds the adjusted-life equation at contaminated or partial-film conditions, and the 1.34 C0/C balance shows this execution is tuned to thrust-heavy combined loads rather than pure radial running. Note the minimum-axial-load requirement: at light radial load and high speed the rollers of HH224334 must still be held into the rib contact, which is another reason the catalogue recommends paired mounting with controlled setting. Material and manufacturing detail: the 11500 g catalogue mass reflects through-hardened bearing steel (density ~7.85 g/cm³) machined to the HH200 ISO envelope, with the pressed-steel cage contributing roughly 345 g of the total; the 99.975 mm bore is ground to IT5 roundness and the 212.725 mm OD to IT5 cylindricity, and the 66.675 mm width tolerance keeps the pair-setting scatter within the ISO preload class.
Typical equipment & failure modes
Common applications
- marine deck machinery shafts
- heavy industrial gearboxes and speed reducers
- large process pump and compressor shafts
- paper-machine and printing rolls
Known failure patterns
- cup or cone misalignment when the separable rings are not seated square during mounting
- loose cup rotation in the housing when the specified press fit is not achieved
- thermal preload runaway in an O-arrangement pair when inner-ring heat expands the setting
- thermal preload runaway in an O-arrangement pair when inner-ring heat expands the setting
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- rolling-contact fatigue spalling after the rated L10 life is exceeded
Selection pitfalls — read before you substitute
- Mount the 99.975 mm bore HH224334 by induction heating of the cone (max 120 °C — the pressed-steel cage sets the ceiling, not the steel); driving it home through the cup or rollers brinells the tapered raceway.
- The HH224300-series inch series at 99.975 mm bore (212.725×66.675 mm) follows the Timken cone/cup convention; substitutions must match both the cone and cup reference exactly — interchanging with another series or a metric 3xxxx bearing of the same bore changes OD, width and contact angle, so re-run the pair setting and shoulder-diameter checks before swapping.
- Do not mix brands or executions inside one HH224334 pair — matched sets are ground for a specific setting, and pairing a SKF basic unit with a different suffix variant will not share the setting evenly.
- O (back-to-back) pairs are stiffer against moments, X (face-to-face) pairs tolerate misalignment and thermal growth better; choosing the arrangement from the 2D drawing rather than the actual shaft thermal expansion is a common HH224334 mounting error.
- The pressed-steel cage is rated for standard industrial service; sustained running above the limiting speed or with degraded lubricant wears the cage pockets — inspect the cage at every relubrication interval.
- The 619/830 kN ratings are SKF catalogue 17000 values for the basic execution; SKF can revise internal geometry without changing the order number, so keep the catalogue version (PUB BU/P1 17000/1 EN, 2018) with the specification and re-verify for critical drives.
- SKF lists several executions of HH224334 (basic, B steeper angle, Q/J2 clearance variants); they are not interchangeable order numbers — quote the full SKF HH 224334/310 designation when purchasing and match the execution to the mounting arrangement.
Frequently asked questions
Is HH224334 interchangeable with other brands?
Inch-series tapered roller bearings follow a long-standing industry boundary plan, so cones and cups of the same basic number are generally dimensionally interchangeable across manufacturers. However, internal geometry, cage design and load ratings differ by brand, so for paired or precision applications keep both halves of the set from one manufacturer — or re-verify ratings and setting when mixing.
What are the dimensions and catalogue data of HH224334?
The SKF HH 224334/310 is a single-row tapered roller bearing with 99.975 mm bore, 212.725 mm outer diameter and 66.675 mm width (3.936 × 8.375 × 2.625 in). From SKF catalogue PUB BU/P1 17000: basic dynamic load rating C 619 kN, C0 830 kN, fatigue load limit Pu 88 kN, reference speed 2,200 r/min, limiting speed 3,000 r/min, mass about 11500 g. It is an open, separable bearing with a pressed-steel cage.
How does the HH224334 inch-series designation work?
Inch-series tapered roller bearings use a Timken-style cone/cup convention: the number before the slash identifies the cone (inner ring with roller and cage assembly), the number after the slash identifies the cup (outer ring), and the HH224300-series code marks the dimensional series. The metric dimensions 99.975×212.725×66.675 mm are the converted equivalents of the original inch boundary dimensions.
What do the cone and cup numbers in HH224334 mean?
The cone number (before the slash) identifies the inner ring, rollers and cage; the cup number (after the slash) identifies the outer ring. Both are quoted together because a single-row tapered roller bearing is a matched separable pair — the cone and cup are ground to work together and are not interchangeable with arbitrary other parts. The series prefix (HH224300-series) groups sizes that share the same boundary-dimension plan.
Can a single HH224334 take axial load in both directions?
No — one single-row tapered roller bearing reacts thrust in one direction only, and under radial load its contact angle induces an axial force. Use two bearings as a matched pair: O (back-to-back) for a rigid, moment-resisting arrangement, X (face-to-face) where thermal expansion must be tolerated, or tandem where one-direction thrust is shared.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 8.2 inch single-row TRB on 2026-09-28. Read our editorial & correction policy.