32020 bearing: complete specifications & equivalents
The 32020 is a ISO 355 radial bearing sized 100 x 150 x 32 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | FAG |
| Bore diameter d | 100 mm |
| Outer diameter D | 150 mm |
| Width B | 32 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 205 kN |
| Basic static load rating C0 | 285 kN |
| Fatigue load limit Pu | 44.5 kN |
| Reference speed (thermal) | 2900 rpm |
| Limiting speed (mechanical) | 5400 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1910 g |
| Manufacturer designation | 32020-X-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 & 32000-series range
| Bore d | 3.937 in |
|---|---|
| Outer diameter D | 5.906 in |
| Width B | 1.26 in |
| ISO bore code | 20 |
| Radial section height (D−d)/2 | 25 mm |
| Smallest bore in 32000-series | 20 mm |
| Largest outer diameter in 32000-series | 650 mm |
| Width range across 32000-series | 15–130 mm |
| Bore position in 32000-series (smallest first) | 20 of 43 |
| Bore above smallest 32000-series size | 80 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32020 | 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. |
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 32020 model number is decoded
FAG 32020 (32020-X-XL) is the low-friction section tapered roller choice for a 100 mm shaft — one row of tapered rollers on an asymmetric raceway inside the 150×32 mm ISO 355 envelope.On the FAG nameplate, 32020 follows the ISO 355 convention: 3 for the tapered-roller type, 2 for the low-friction section, final digits 20 for the 100 mm bore. In Schaeffler notation 32020-X-XL is the basic X-life execution; B-suffix variants have a steeper contact angle and are not interchangeable with the base bearing. The 25.0 mm radial section height ((150−100)/2) and 1910 g catalogue mass frame a 100 mm bore bearing rated at 205 kN C — roughly 2.05 kN of dynamic capacity per millimetre of bore before application factors. Because the contact line is tapered, one 32020 reacts thrust in a single direction; bidirectional shafts need an O or X pair, and a rotating cone on a 100 mm shaft typically takes a k5 seat with an H7 housing bore.
Typical equipment & failure modes
Common applications
- rolling-mill auxiliary drives
- crane sheave and hoist gearboxes
- paper-machine and printing rolls
- construction machinery drives
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
- axial overload spalling at the roller-rib contact beyond the single-row thrust rating
- preload loss as the mounted pair relaxes, letting rollers skid and smear the raceways
- pressed-steel cage wear or fracture after prolonged running above the limiting speed
- electrical pitting on VFD-driven shafts without grounding protection
Selection pitfalls — read before you substitute
- Mount the 100 mm bore 32020 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 320 series at 100 mm bore (150×32 mm) is the low-friction, higher-speed section; it carries less thrust than a 30220 of the same bore, so verify the axial load share before swapping.
- Do not mix brands or executions inside one 32020 pair — matched sets are ground for a specific setting, and pairing a FAG basic unit with a different suffix variant will not share the setting evenly.
- Do not mix brands or executions inside one 32020 pair — matched sets are ground for a specific setting, and pairing a FAG basic unit with a different suffix variant will not share the setting evenly.
- Open 32020 units need application-supplied sealing and a defined EP lubricant supply; the roller-rib contact is the first to fail when the additive film breaks down.
- The 205/285 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 32020 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 32020?
The 32020-X-XL is a single-row tapered roller bearing with 100 mm bore, 150 mm outer diameter and 32 mm width (3.937 × 5.906 × 1.26 in) per ISO 355. From Schaeffler HR1 (2022 edition): basic dynamic load rating C 205 kN, C0 285 kN, fatigue load limit Pu 44.5 kN, reference speed 2,900 r/min, limiting speed 5,400 r/min, mass about 1910 g. It is an open, separable bearing with a pressed-steel cage.
How does the 32020 bore code work?
The last two digits of 32020 are bore code 20, so 20 × 5 = 100 mm bore. The 150 mm OD and 32 mm width come from the ISO 355 dimension-series plan, shared with other tapered bearings of the same code.
What do the 32020 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 (low-friction 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 32020 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 32020 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 32020 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.