Library › Hardware › Needle roller bearings NK, NKS, RNA4900 (NK10/16, NK20/20, RNA4904…
RNA4900 needle roller bearing (machined ring, no inner ring) envelope
RNA4900 needle roller bearing (machined ring, no inner ring) envelope: roller-set bore Fw Ø14, OD Ø22, width 13; one solid ring, corners rounded at r min 0.3; the bore is the inscribed circle of the needles, not a machined bore; no needles, cage or lubrication hole; nominal values
Exact dimensions. True size, no tolerance added. Threads are plain cylinders at the major diameter.
STEP STL free, CC BY 4.0 (credit "Xem Studio")
Dimensions
| bearing | RNA4900 |
|---|---|
| roller-set bore Fw, mm | 14 |
| OD D, mm | 22 |
| width C, mm | 13 |
| r min, mm | 0.3 |
| source | Koyo + Emerson |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.From the full sheet
Needle roller bearings NK, NKS, RNA4900 (NK10/16, NK20/20, RNA4904 and more): Fw, OD, width, r min + 14 ring-envelope STEP/STL files: every size, notes, mating features and sources. What are the dimensions of an NK 10/16, NK 20/20, RNA4900, RNA4904 or RNA4905 needle roller bearing: roller-set bore Fw, outside diameter, width and chamfer?
Other sizes
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- RNA4905 needle roller bearing (machined ring, no inner ring) envelope
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