Thrust ball bearing · 512 series
51215 bearing
75 × 110 × 27 mm
The 51215 is a thrust ball bearing with a 75 mm bore, 110 mm outside diameter and 27 mm height. Light series with greater height and capacity than 511.
- Bore d
- 75 mm 2.9528 in
- Outside diameter D
- 110 mm 4.3307 in
- Height H
- 27 mm 1.063 in
- Dimension series
- 12
- Load directions
- Axial in one direction only
Designation explained
What 51215 means
Standard bearing numbers encode the type, the dimension series and the bore. Anything after the base number — seals, clearance, cage — is a suffix.
| Part | Meaning |
|---|---|
5 | Thrust ball bearing, single direction |
12 | Dimension series 12 (thrust) |
15 | 15 → 75 mm bore (15 × 5) |
Variants
Common 51215 variants
Suffixes change the bearing without changing its boundary dimensions. The exact letters differ between manufacturers — always order by the full designation from the maker you choose.
| Suffix | Example | Meaning |
|---|---|---|
(no suffix) | 51215 | Standard single-direction design: shaft washer, housing washer, ball and cage assembly |
M / TN | 51215-M | Cage material: brass (M) or polyamide (TN) — varies by size and maker |
Same bore
Other 75 mm bore bearings
Every standard bearing in this reference with a 75 mm bore, from light to heavy sections.
| Designation | Type | D | B / H |
|---|---|---|---|
| 6015 | Deep groove ball bearing | 115 mm | 20 mm |
| 6215 | Deep groove ball bearing | 130 mm | 25 mm |
| 6315 | Deep groove ball bearing | 160 mm | 37 mm |
| 6415 | Deep groove ball bearing | 190 mm | 45 mm |
| 61815 | Deep groove ball bearing | 95 mm | 10 mm |
| 61915 | Deep groove ball bearing | 105 mm | 16 mm |
| 16015 | Deep groove ball bearing | 115 mm | 13 mm |
| 1215 | Self-aligning ball bearing | 130 mm | 25 mm |
| 1315 | Self-aligning ball bearing | 160 mm | 37 mm |
| 2215 | Self-aligning ball bearing | 130 mm | 31 mm |
| 2315 | Self-aligning ball bearing | 160 mm | 55 mm |
| 7215 | Angular contact ball bearing | 130 mm | 25 mm |
| 7315 | Angular contact ball bearing | 160 mm | 37 mm |
| NU215 | Cylindrical roller bearing | 130 mm | 25 mm |
| NU315 | Cylindrical roller bearing | 160 mm | 37 mm |
| NU2215 | Cylindrical roller bearing | 130 mm | 31 mm |
| NU2315 | Cylindrical roller bearing | 160 mm | 55 mm |
| 22215 | Spherical roller bearing | 130 mm | 31 mm |
| 22315 | Spherical roller bearing | 160 mm | 55 mm |
| 30215 | Tapered roller bearing | 130 mm | 27.25 mm |
| 30315 | Tapered roller bearing | 160 mm | 40 mm |
| 32015X | Tapered roller bearing | 115 mm | 25 mm |
| 32215 | Tapered roller bearing | 130 mm | 33.25 mm |
| 32315 | Tapered roller bearing | 160 mm | 58 mm |
| 51115 | Thrust ball bearing | 100 mm | 19 mm |
| 51315 | Thrust ball bearing | 135 mm | 44 mm |
| UCP215 | Pillow block bearing unit | — | — |
Where to buy
Find 51215 at sellers
Search results on independent sellers. We are not affiliated with them, do not earn from these links and do not see their prices or stock. Results mix brands and variants — check the full designation before you order.
About these dimensions. Boundary dimensions follow ISO 104 (thrust bearings — boundary dimensions), dimension series 12, and are the same for every manufacturer of a standard 51215. Chamfers, load ratings, speed limits and weight depend on the manufacturer and design and are not shown — use the maker's datasheet for engineering decisions. Last checked 9 October 2026. Spotted an error? Tell us.
Learn more
What size is a 51215 bearing?
A 51215 is a thrust ball bearing with a 75 mm bore, 110 mm outside diameter and 27 mm height (75 × 110 × 27 mm). These boundary dimensions follow the ISO dimension plan, so they are the same across manufacturers.
Where are the load ratings and speed limits?
They depend on the manufacturer and internal design, so we do not list a single value. Check the datasheet for the exact full designation you intend to use.
Need 51215 data for a whole catalog?
We can help with that.
Normalized specifications, variants and supplier listings for every bearing you sell, with the source behind each value.