32008 bearing: complete specifications & equivalents
The 32008 is a ISO 355 radial bearing sized 40 x 68 x 19 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | FAG |
| Bore diameter d | 40 mm |
| Outer diameter D | 68 mm |
| Width B | 19 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | steel, stamped ribbon (J-type) |
| Basic dynamic load rating C | 63 kN |
| Basic static load rating C0 | 71 kN |
| Fatigue load limit Pu | 11.2 kN |
| Reference speed (thermal) | 6200 rpm |
| Limiting speed (mechanical) | 12800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 279 g |
| Manufacturer designation | 32008-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 | 1.575 in |
|---|---|
| Outer diameter D | 2.677 in |
| Width B | 0.748 in |
| ISO bore code | 08 |
| Radial section height (D−d)/2 | 14 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) | 8 of 43 |
| Bore above smallest 32000-series size | 20 mm |
Cross references & equivalents
| Equivalent model | Brand | Match level | Note |
|---|---|---|---|
| 32008 | 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. |
| 32008-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 32008 model number is decoded
32008 is a single-row tapered roller bearing in the ISO 32000 dimension series: a separable cone-and-cup design for combined radial and one-direction axial load, listed by FAG in Schaeffler HR1 (2022 edition).Numbering ties the bearing to its envelope: 32008 means tapered-roller type 3, low-friction section series 2, 40 mm bore — which is why the 68×19 mm outline swaps dimensionally with other ISO 355 bearings of the same code. In Schaeffler notation 32008-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 14.0 mm radial section height ((68−40)/2) and 279 g catalogue mass frame a 40 mm bore bearing rated at 63 kN C — roughly 1.57 kN of dynamic capacity per millimetre of bore before application factors. Fit selection follows the rotating ring — interference on a rotating cone — and two 32008 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
- differential and pinion drives
- pump and compressor shafts
- machine-tool spindles
- belt-driven fan and blower 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
- 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
- brinelling from pressing the cone or cup home through the rollers
Selection pitfalls — read before you substitute
- On this 40 mm bore, interference and temperature rise consume clearance inside a preloaded pair; calculate the residual clearance after mounting and at operating temperature — an over-tight 32008 pair heats, loses setting control and smears the roller-rib contact.
- The 320 series at 40 mm bore (68×19 mm) is the low-friction, higher-speed section; it carries less thrust than a 30208 of the same bore, so verify the axial load share before swapping.
- A single 32008 cannot locate the shaft axially in both directions; mounting it singly on a reversing-thrust shaft leaves one direction uncontrolled — always use an O or X matched pair for bidirectional location.
- When the outer ring rotates, reverse the fit logic and provide cup location; the tapered contact of 32008 pushes the rings apart under load, so a non-located cup walks its seat even when the shaft is fixed.
- 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 63/71 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 32008 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 32008?
The 32008-X-XL is a single-row tapered roller bearing with 40 mm bore, 68 mm outer diameter and 19 mm width (1.575 × 2.677 × 0.748 in) per ISO 355. From Schaeffler HR1 (2022 edition): basic dynamic load rating C 63 kN, C0 71 kN, fatigue load limit Pu 11.2 kN, reference speed 6,200 r/min, limiting speed 12,800 r/min, mass about 279 g. It is an open, separable bearing with a pressed-steel cage.
How does the 32008 bore code work?
The last two digits of 32008 are bore code 08, so 08 × 5 = 40 mm bore. The 68 mm OD and 19 mm width come from the ISO 355 dimension-series plan, shared with other tapered bearings of the same code.
What do the 32008 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 32008 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 32008 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 32008 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.