618-1500-TN bearing: complete specifications & equivalents
The 618-1500-TN is a ISO 15 radial bearing sized 1500 x 1820 x 140 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 1500 mm |
| Outer diameter D | 1820 mm |
| Width B | 140 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 1170 kN |
| Basic static load rating C0 | 4150 kN |
| Fatigue load limit Pu | 43 kN |
| Reference speed (thermal) | 380 rpm |
| Limiting speed (mechanical) | 240 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 638000 g |
| Manufacturer designation | 618/1500 TN |
| Standard | ISO 15 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018) |
| Last verified | 2026-09-27 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018)) · extracted 2026-09-27
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018)); 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 & 61800-series range
| Bore d | 59.055 in |
|---|---|
| Outer diameter D | 71.654 in |
| Width B | 5.512 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 160 mm |
| Smallest bore in 61800-series | 1 mm |
| Largest outer diameter in 61800-series | 1820 mm |
| Width range across 61800-series | 1–140 mm |
| Bore position in 61800-series (smallest first) | 74 of 74 |
| Bore above smallest 61800-series size | 1499 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 618-1500-TN model number is decoded
In the large-bore 61800-series, the bore is written directly after the slash as 1500 mm (large thin-section bores use the slash spelling instead of the two-digit code). The envelope is 1500×1820×140 mm (59.055×71.654×5.512 in) with a 160.0 mm radial section height, C 1170 kN, C0 4150 kN and Pu 43 kN. The open 618/1500 TN carries no shields or seals and relies on application lubrication and external sealing. The TN suffix identifies the glass-fibre polyamide cage execution, a separate order number from the steel-cage version. Limiting speed 240 r/min, catalogue mass 638000 g. A thin section saves space but leaves little margin for misalignment or shaft deflection.
Typical equipment & failure modes
Common applications
- heavy conveyor drives
- hoists and winches
- industrial fans and blowers
- mill and kiln auxiliaries
Known failure patterns
- contamination wear when the open arrangement is used without external seals
- lubricant starvation where no regreasing interval is maintained
- cage damage from running beyond the limiting speed
- raceway smearing under marginal lubrication at start-up
Selection pitfalls — read before you substitute
- Mount by heating the inner ring (max 120 °C) — driving 618-1500-TN home through the outer ring or balls brinells the raceways.
- Deep-groove geometry tolerates only minutes of misalignment; if the 1820 mm housing bore cannot be aligned, move to a self-aligning bearing rather than shimming 618-1500-TN.
- Suffix TN is a glass-fibre-reinforced polyamide cage: quiet and light at the 240 r/min limiting speed, but it softens above roughly 120 °C — check the oil temperature in hot drives.
- Open 618-1500-TN needs external sealing at the arrangement level; in dusty housings its life depends entirely on those external seals and the regreasing schedule.
- Plan a relubrication interval for 618-1500-TN; run-to-failure on open deep-groove bearings is the dominant early-failure cause.
- Assign interference to the rotating ring: on a conventional shaft-mounted 1500 mm position the inner ring rotates, so use a k5/m6 shaft seat with an H7 housing — reverse the logic if the outer ring rotates.
Frequently asked questions
What are the dimensions of 618-1500-TN?
The SKF 618/1500 TN measures 1500 mm bore × 1820 mm OD × 140 mm width (59.055 × 71.654 × 5.512 in), mass about 638000 g. It is open, with no shields or seals.
Why is there a slash in the designation 618/1500 TN?
The slash writes a bore that falls outside the two-digit code table: 618/1500 means 1500 mm bore. The site slug 618-1500-TN replaces the slash with a hyphen.
What load can 618-1500-TN take?
Catalogue values for 618/1500 TN: dynamic C 1170 kN, static C0 4150 kN, fatigue limit Pu 43 kN. Use C in life calculation and C0 for static checks at 1500 mm bore.
What is the speed rating of 618-1500-TN?
SKF lists a 380 r/min thermal reference speed and a 240 r/min mechanical limiting speed for 618/1500 TN; real limits also depend on lubrication and fits.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018) on 2026-09-27. Read our editorial & correction policy.