32212 bearing: complete specifications & equivalents
The 32212 is a ISO 355 radial bearing sized 60 x 110 x 29.75 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | FAG |
| Bore diameter d | 60 mm |
| Outer diameter D | 110 mm |
| Width B | 29.75 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 158 kN |
| Basic static load rating C0 | 171 kN |
| Fatigue load limit Pu | 27.5 kN |
| Reference speed (thermal) | 3850 rpm |
| Limiting speed (mechanical) | 8000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1180 g |
| Manufacturer designation | 32212-XL |
| Standard | ISO 355 |
| Catalog version | Schaeffler HR1 (2022 ed.), Tapered roller bearings DIN/ISO 355 |
| Last verified | 2026-09-26 |
Source: catalog reference (Schaeffler HR1 (2022 ed.), Tapered roller bearings DIN/ISO 355) · extracted 2026-09-26
Parameters extracted from the official FAG Rolling Bearings catalogue (Schaeffler HR1 (2022 ed.), Tapered roller bearings DIN/ISO 355); FAG® is a trademark of Schaeffler Technologies AG & Co. KG, used here for identification only — mpnbase is not an authorized FAG/Schaeffler distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at schaeffler.com.
Dimensions in inches & 32200-series range
| Bore d | 2.362 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 1.171 in |
| ISO bore code | 12 |
| Radial section height (D−d)/2 | 25 mm |
| Smallest bore in 32200-series | 17 mm |
| Largest outer diameter in 32200-series | 580 mm |
| Width range across 32200-series | 17.25–159 mm |
| Bore position in 32200-series (smallest first) | 11 of 36 |
| Bore above smallest 32200-series size | 43 mm |
Mounting, setting & life for 32212
Fits & mounting
- Tapered bearings are separable: press the cup square into the housing and fit the cone on the shaft — usually an interference fit on both seats in wheel/hub positions.
- Mount the cone by induction heating (max 120 °C); never strike the cage or rollers directly.
- Shaft and housing shoulders must clear the ring chamfers so the cone and cup seat fully against their faces.
Setting — the step deep-groove bearings never need
- After seating, set the assembly to a defined end play or preload with the locknut/shim arrangement; locknut torque seats the parts — it is not the final adjustment.
- General free-running positions: back the nut off while measuring with a dial indicator to a small end play (commonly around 0.05–0.15 mm for medium metric hubs — follow the OEM value).
- Pinions and stiff arrangements run a controlled preload; too much preload is the classic cause of early spalling and heat.
- Sealed factory-set units exist for specific designations — the open 32212 assumes the application sets and lubricates it.
Lubrication
Open TRBs are lubricated by the application. Fill the bearing with grease (typically around one third to one half of the free cavity — overpacking a TRB causes churning heat) and provide a relubrication path; intervals depend on contamination and temperature, not on catalogue rating alone.
Why the equivalent load matters more here
TRBs carry combined radial and axial loads, so the dynamic equivalent load P is computed with the bearing's e, X and Y factors for the actual thrust ratio — using the radial load alone over-estimates life badly.
Worked L10 life example (illustrative duty)
For roller bearings the life exponent is p = 10/3: L10h = (C/P)10/3 · 106 / (60·n). Taking an example equivalent load P = 31.6 kN (20% of C) at n = 1,500 r/min — substitute the real P from the X/Y calculation:
C = 158.0 kN → L10h ≈ 2,375 hours
Choosing a series at the same 60 mm bore
| Series | Open execution | OD × width T | C (kN) | C0 (kN) | Limiting speed (r/min) |
|---|---|---|---|---|---|
| 320xx | 32012 | 95 × 23 | 97.0 | 124.0 | 8,800 |
| 302xx | 30212 | 110 × 23.75 | 120.0 | 114.0 | 6,000 |
| 322xx | 32212 | 110 × 29.75 | 158.0 | 171.0 | 8,000 |
| 332xx | 33212U | 110 × 38 | 179.0 | 223.0 | 3,400 |
| 303xx | 30312D | 130 × 33.5 | 167.0 | 176.0 | 2,700 |
| 323xx | 32312C | 130 × 48.5 | 237.0 | 296.0 | 2,900 |
| 313xx | 31312 | 130 × 33.5 | 177.0 | 166.0 | 5,300 |
Different series at the same bore are not drop-in swaps — OD, width and contact angle all change — and a cone number alone never identifies a complete set. Verify matches per the cross-reference levels guide; envelope variants are on the 60×110×29.75 envelope page.
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32212 | ISO 15 | full Dimensions and internal design equivalent — standard interchange. | ISO 15 boundary-dimension envelope; standard interchange — confirm clearance class and precision with the supplier. |
| 32212-DF | SKF | verify Commonly quoted cross reference; confirm against the target catalog before ordering. | Model-number interchange per ISO 15; confirm dimensions, sealing and ratings in the supplier catalogue. |
| 32212-SKF | SKF | 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. |
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 32212 model number is decoded
The 32212-XL is a 60×110×29.75 mm single-row tapered roller bearing — the heavy section entry in the 32200 series, with an asymmetric raceway cut for thrust capacity and separable mounting.Digit by digit, 32212 reads as bearing type 3 (single-row tapered roller), heavy section series 2, and bore reference 12 resolving to 60 mm; 110 mm OD and 29.75 mm width are the matching ISO 355 boundary values. In Schaeffler notation 32212-XL is the basic X-life execution; B-suffix variants have a steeper contact angle and are not interchangeable with the base bearing. With C 158 kN and C0 171 kN, the 32212 pair-sizing check is dominated by the axial share: keep the equivalent load P below the rating at the required L10, remembering one bearing alone cannot cover reversing thrust at 8,000 r/min. Fit selection follows the rotating ring — interference on a rotating cone — and two 32212 units are required to take reversing thrust; keep the induced axial load inside the rated capacity when calculating the pair.
Typical equipment & failure modes
Common applications
- crane sheave and hoist gearboxes
- paper-machine and printing rolls
- construction machinery drives
- marine deck machinery shafts
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
- preload loss as the mounted pair relaxes, letting rollers skid and smear the raceways
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- cage pocket scoring when the bearing starts cold with grease of too-high base-oil viscosity
- brinelling from pressing the cone or cup home through the rollers
Selection pitfalls — read before you substitute
- Mount the 60 mm bore 32212 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 322 series at 60 mm bore (110×29.75 mm) is a wider, higher-capacity section than 30212; do not substitute without re-checking shaft shoulder diameters and pair setting.
- 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 32212 mounting error.
- Setting is a design value, not an assembly feel: excessive preload in the 32212 pair raises operating temperature and can trigger thermal runaway, while too little lets the rollers skid and smear the raceway under light load.
- The 32212 shares its ISO 355 envelope with other tapered bearings of the same code but is not a drop-in replacement for a ball bearing: it cannot run effectively under pure radial load without a minimum axial load, and a deep-groove bearing cannot replace its combined-load duty.
- The 158/171 kN ratings are Schaeffler HR1 values for the X-life execution; the -XL suffix denotes the premium grade and is part of the order designation, so quote it in full when purchasing.
- Schaeffler lists 32212 in the X-life basic execution; variant executions with -B or other suffixes are separate order numbers and are not interchangeable with the basic X-life bearing.
Frequently asked questions
What are the dimensions and catalogue data of 32212?
The 32212-XL is a single-row tapered roller bearing with 60 mm bore, 110 mm outer diameter and 29.75 mm width (2.362 × 4.331 × 1.171 in) per ISO 355. From Schaeffler HR1 (2022 edition): basic dynamic load rating C 158 kN, C0 171 kN, fatigue load limit Pu 27.5 kN, reference speed 3,850 r/min, limiting speed 8,000 r/min, mass about 1180 g. It is an open, separable bearing with a pressed-steel cage.
How does the 32212 bore code work?
The last two digits of 32212 are bore code 12, so 12 × 5 = 60 mm bore. The 110 mm OD and 29.75 mm width come from the ISO 355 dimension-series plan, shared with other tapered bearings of the same code.
What do the 32212 series and X-life execution designations mean?
The leading 3 marks a single-row tapered roller bearing; the second digit 2 is the ISO 355 series (heavy section). The FAG -XL suffix denotes X-life premium grade; the ISO 355 series code is interchangeable with other brands. A steeper-contact-angle variant (B suffix) is a different order number and is not interchangeable with the basic execution.
Can a single 32212 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.
How does 32212 compare with a ball bearing of the same bore?
A tapered roller bearing has line contact and a steep contact angle: much higher combined axial-plus-radial capacity and shock resistance than a ball bearing of the same bore, at the cost of speed, one-direction thrust, mandatory pairing for reversing loads and a minimum axial load requirement. A ball bearing cannot be dropped into a combined-load 32212 position and vice versa — verify load direction, Fa/Fr ratio and speed before substituting.
Reviewed & verified by the MPN Base engineering desk against source catalog Schaeffler HR1 (2022 ed.), Tapered roller bearings DIN/ISO 355 on 2026-09-26. Read our editorial & correction policy.