Cylindrical roller bearings have a large load capacity and mainly bear radial loads. Its structure is simple, including cylindrical rolling elements, inner rings, outer rings, and retainers. Single-row cylindrical roller bearings are the most basic type. Its different structures are reflected in the different designs of the ribs. Common basic cylindrical roller bearing types include N NU, NJ NF, and NUP.
The following chart is a simple summary of the comparison of the different rib types for cylindrical roller bearings.
| Type | Inner Ring | Outer Ring | Axial Displacement | Axial Load |
|---|---|---|---|---|
| N | Double Rib | No Rib | Large | None |
| NU | No Rib | Double Rib | Large | None |
| NJ | Double Rib | Single Rib | Limited | Small One-Way |
| NF | Double Rib | Single Rib | Poor | Large One-Way |
| NUP | Single Rib + Loose Ring | Double Rib | Restricted | Two-Way |
| Inquiry | Bearing NO. | Boundary dimensions(mm) | Basic load ratings(kN) | Limiting speed(rpm) | Abutment and fillet dimensions(mm) | Weight (kg) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | D | B | r 1.2min | r3.4min | Cr | Cor | Grease | Oil | da max | Da max | ra max | Refer | |||
| NCF29/950V | 950 | 1250 | 175 | 7.5 | 7.5 | 6660 | 16300 | 75 | 160 | 983 | 1217 | 6 | 565 | ||
| NCF18/1000V | 1000 | 1220 | 100 | 6 | 6 | 2920 | 7500 | 75 | 160 | 1026 | 1194 | 5 | 230 | ||
| NCF28/1000V | 1000 | 1220 | 128 | 6 | 6 | 4130 | 11600 | 75 | 160 | 1026 | 1194 | 5 | 310 | ||
| NCF29/1000V | 1000 | 1320 | 185 | 7.5 | 7.5 | 7480 | 18600 | 70 | 150 | 1033 | 1287 | 6 | 680 | ||
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