NA4901 is a needle roller designation documented on BearingIndex from 1 manufacturer publication. The published boundary dimensions are 12 × 24 × 13 mm. The designation ends in bore code 01, which resolves to a 12 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 NA4901 | 10.1 | 11.7 | 15000 | 23000 | 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 | 6 mm |
| Mean diameter dm | (D + d) / 2 | 18 mm |
| Speed factor dm · n | mean diameter × highest published limiting speed | 414,000 mm·min−1 |
| C / C₀ load ratio | dynamic ÷ static load rating | LYC 0.86 |
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 | Envelope d × D × B (mm) | Bearing family | Works |
|---|---|---|---|
| NA4904 | 20 × 37 × 17 | Needle roller | 1 |
| NA4905 | 25 × 42 × 17 | Needle roller | 1 |
| NA4906 | 30 × 47 × 17 | Needle roller | 1 |
| NA4907 | 35 × 55 × 20 | Needle roller | 1 |
| NA4908 | 40 × 62 × 22 | Needle roller | 1 |
| NA4909 | 45 × 68 × 22 | Needle roller | 1 |
| NA4910 | 50 × 72 × 22 | Needle roller | 1 |
| NA4911 | 55 × 80 × 25 | Needle roller | 1 |
| NA4913 | 65 × 90 × 25 | Needle roller | 1 |
| NA4914 | 70 × 100 × 30 | Needle roller | 1 |
| NA4916 | 80 × 110 × 30 | Needle roller | 1 |
| NA4917 | 85 × 120 × 35 | Needle roller | 1 |
| NA4918 | 90 × 125 × 35 | Needle roller | 1 |
| NA4922 | 110 × 150 × 40 | Needle roller | 1 |
| NA4924 | 120 × 165 × 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 →
