Bearing size reference
Pillow block bearing units: size tables
UCP two-bolt pillow block units: a set-screw insert bearing (UC2xx) in a cast-iron P2xx housing, ready to bolt to a frame.
A UCP unit combines a UC2xx insert bearing — a sealed ball bearing with an extended inner ring and set screws — with a two-bolt pillow block housing. The spherical seat lets the insert align with the shaft during mounting.
The number after UCP is the bore code: UCP205 fits a 25 mm shaft. Shaft centre height H and bolt-hole spacing J are standardised (JIS B 1559 / ISO 3228); overall height, foot dimensions and bolt slots vary slightly between manufacturers.
| Property | |
|---|---|
| Loads | Radial, moderate axial; tolerates initial misalignment |
| Typical uses | Conveyors, Agricultural machinery, Fans and blowers, Packaging and food machinery |
| Standard sizes listed | 18 |
| Dimension standard | JIS B 1559 / ISO 3228 |
Dimension series P2
UCP200 series
Two-bolt cast-iron pillow block with UC2xx set-screw insert bearing.
| Unit | Shaft d (mm) | Centre height H (mm) | Bolt spacing J (mm) | Length L (mm) | Insert / housing |
|---|---|---|---|---|---|
| UCP201 | 12 | 30.2 | 95 | 127 | UC201 / P201 |
| UCP202 | 15 | 30.2 | 95 | 127 | UC202 / P202 |
| UCP203 | 17 | 30.2 | 95 | 127 | UC203 / P203 |
| UCP204 | 20 | 33.3 | 95 | 127 | UC204 / P204 |
| UCP205 | 25 | 36.5 | 105 | 140 | UC205 / P205 |
| UCP206 | 30 | 42.9 | 121 | 165 | UC206 / P206 |
| UCP207 | 35 | 47.6 | 127 | 167 | UC207 / P207 |
| UCP208 | 40 | 49.2 | 137 | 184 | UC208 / P208 |
| UCP209 | 45 | 54 | 146 | 190 | UC209 / P209 |
| UCP210 | 50 | 57.2 | 159 | 206 | UC210 / P210 |
| UCP211 | 55 | 63.5 | 171 | 219 | UC211 / P211 |
| UCP212 | 60 | 69.8 | 184 | 241 | UC212 / P212 |
| UCP213 | 65 | 76.2 | 203 | 265 | UC213 / P213 |
| UCP214 | 70 | 79.4 | 210 | 266 | UC214 / P214 |
| UCP215 | 75 | 82.6 | 217 | 275 | UC215 / P215 |
| UCP216 | 80 | 88.9 | 232 | 292 | UC216 / P216 |
| UCP217 | 85 | 95.2 | 247 | 310 | UC217 / P217 |
| UCP218 | 90 | 101.6 | 262 | 327 | UC218 / P218 |
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