The NTN 51311 is a standard size thrust ball bearings with ISO dimensions 55×105×35 mm. Bearings in the 55mm bore range are commonly used in vertical ball screws, large CNC rotary tables, heavy jacks, vertical pump shafts. This is an open type, requires periodic lubrication, suitable for clean environments variant. NTN Japan — Japanese technology, consistent quality, strong in automotive and machine tool bearings — 4 equivalent brands available under ISO designation 51311.
NTN 51311
Thrust Ball Bearings — 55×105×35 mm — ISO 51311
Technical Specifications
Full specifications for NTN 51311 per OEM catalog.
* Tolerances per ISO. Specifications per OEM catalog.
Cross-Reference — Equivalent Codes
Same ISO 51311 — interchangeable dimensions.
| Brand | Part Number |
|---|---|
| NTN | 51311 |
| fag | 51311 |
| nsk | 51311 |
| skf | 51311 |
| zvl | 51311 |
| nachi | 51311 |
* C/C₀ may vary ±5% across manufacturers.
FAQ — NTN 51311
Quick answers to common questions.
Common Applications
Thrust Ball Bearings with 55mm bore diameter are commonly used in vertical ball screws, large CNC rotary tables, heavy jacks, vertical pump shafts.
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