{
  "$type": "site.standard.document",
  "description": "A rolling bearing unit for a drive wheel comprises a hub (4e) and a double row rolling bearing thereon. The hub has a first inner ring raceway formed on an inner ring (5) element integrally or separately formed with the hub in an intermediate portion, and a fit cylindrical surface section in a part…",
  "path": "/patents/1099309",
  "publishedAt": "2003-01-02T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B21J9/025",
    "NSK LTD [JP]"
  ],
  "textContent": "A rolling bearing unit for a drive wheel comprises a hub (4e) and a double row rolling bearing thereon. The hub has a first inner ring raceway formed on an inner ring (5) element integrally or separately formed with the hub in an intermediate portion, and a fit cylindrical surface section in a part closer to the inner end of the outer peripheral surface. A separate inner ring having a second inner ring raceway is fitted on the hub, with the axially inner end surface pressed by a caulking portion formed by plastically deforming a cylindrical section formed in the axially inner end portion of the hub in a state that the inner ring is fitted on the fit cylindrical surface section, to be fixed to the hub.",
  "title": "Rolling bearing unit for a drive wheel and a wheel driving unit"
}