NA4844 is a needle roller designation documented on BearingIndex from 1 manufacturer publication. The published boundary dimensions are 220 × 270 × 50 mm. The designation ends in bore code 44, which resolves to a 220 mm bore under ISO 15 and matches what the manufacturers published. Every value below comes from that manufacturer’s own published material, with the date it was recorded.
| Manufacturer | Dynamic load rating (kN) | Static load rating (kN) | Limiting speed — grease (rpm) | Limiting speed — oil (rpm) | Source recorded | |
|---|---|---|---|---|---|---|
| LYC NA4844 | 242 | 770 | 1100 | 1700 | 2026-09-23 | Request |
A dash means that manufacturer did not publish the value. Dimensions every source agrees on are shown above rather than repeated per row.
| Figure | How it is obtained | Result |
|---|---|---|
| Radial section height | (D − d) / 2 | 25 mm |
| Mean diameter dm | (D + d) / 2 | 245 mm |
| Speed factor dm · n | mean diameter × highest published limiting speed | 416,500 mm·min−1 |
| C / C₀ load ratio | dynamic ÷ static load rating | LYC 0.31 |
Arithmetic on the figures above — not a bearing life calculation for your load case.
Ball and roller bearings
The public product range includes ball and roller bearings. Model-level dimensions and supporting technical documents have not yet been added to this directory.
41 designations documented here · source recorded 2026-09-21
Precision class · Internal clearance · Sealing · Material · Cage material · Z class · V class · Application · Limiting speed · Lubrication · Operating temperature · Precision standard · Ring material · Rolling element material · Noise / vibration test method · Manufacturer series · Manufacturer suffix · Ball count · Ball diameter · Reference mass.
Ask the manufacturer for these when you enquire.
| Designation | Bearing family | Works |
|---|---|---|
| NNC4844CV | Cylindrical roller | 1 |
Same envelope, but sealing, internal design, clearance and load capability differ — not interchangeable by default.
| Designation | Envelope d × D × B (mm) | Bearing family | Works |
|---|---|---|---|
| NA4828 | 140 × 175 × 35 | Needle roller | 1 |
| NA4834 | 170 × 215 × 45 | Needle roller | 1 |
| NA4836 | 180 × 225 × 45 | Needle roller | 1 |
Each envelope shown is that designation’s own published size.
Tick the works you want above, then send one enquiry — each manufacturer answers you separately and cannot see the others.
Figures on this page are each manufacturer’s own published material, recorded on the dates shown. How we check sources →
