Built on precision manufacturing and strict quality control, we deliver reliable, stable, and high-performance bearing solutions to customers worldwide.
The structure with a boss provides higher positioning accuracy and reduces displacement during equipment operation, making it suitable for precision general-purpose machinery with high installation accuracy requirements.
The structure with a boss provides higher positioning accuracy and reduces displacement during equipment operation, making it suitable for precision general-purpose machinery with high installation accuracy requirements.

| Shaft Dimensions (mm) | Size (mm) | Nominal Designation Of Mounting Bolts | Nominal Code Of The Component | Applicable to: Bearing housings (general grade) | Bearing Nominal Code | Applicable bearings Basic rated load (kN) | Coefficient fo | Reference Component Weight (kg) | ||||||||||
| d | L | A | J | N | A1 | A₂ | Ao | B | S | Cr | Cor | ordinary products | cast iron | |||||
| 12 | 86 | 25.5 | 64 | 12 | 11 | 15 | 33.3 | 31 | 12.7 | M10 | UCF201 | F204 | UC201 | 12.8 | 6.65 | 13.2 | 0.64 | 一 |
| 15 | 86 | 25.5 | 64 | 12 | 11 | 15 | 33.3 | 31 | 12.7 | M10 | UCF202 | F204 | UC202 | 12.8 | 6.65 | 13.2 | 0.62 | 一 |
| 17 | 86 | 25.5 | 64 | 12 | 11 | 15 | 33.3 | 31 | 12.7 | M10 | UCF203 | F204 | UC203 | 12.8 | 6.65 | 13.2 | 0.61 | – |
| 20 | 86 | 25.5 | 64 | 12 | 11 | 15 | 33.3 | 31 | 12.7 | M10 | UCF204 | F204 | UC204 | 12.8 | 6.65 | 13.2 | 0.59 | 0.74 |
| 25 | 95 | 27 | 70 | 12 | 13 | 16 | 35.8 | 34.1 | 14.3 | M10 | UCF205 | F205 | UC205 | 14.0 | 7.85 | 13.9 | 0.83 | 1.0 |
| 110 | 29 | 80 | 16 | 13 | 16 | 39 | 38 | 15 | M14 | UCF305 | F305 | UC305 | 21.2 | 10.9 | 12.6 | 1.3 | 1.6 | |
| 30 | 108 | 31 | 83 | 12 | 13 | 18 | 40.2 | 38.1 | 15.9 | M10 | UCF206 | F206 | UC206 | 19.5 | 11.3 | 13.9 | 1.1 | 1.4 |
| 125 | 32 | 95 | 16 | 15 | 18 | 44 | 43 | 17 | M14 | UCF306 | F306 | UC306 | 26.7 | 15.0 | 13.3 | 1.9 | 2.2 | |
| 35 | 117 | 34 | 92 | 14 | 15 | 19 | 44.4 | 42.9 | 17.5 | M12 | UCF207 | F207 | UC207 | 25.7 | 15.4 | 13.9 | 1.5 | 1.9 |
| 135 | 36 | 100 | 19 | 16 | 20 | 49 | 48 | 19 | M16 | UCF307 | F307 | UC307 | 33.4 | 19.3 | 13.2 | 2.3 | 2.7 | |
| 40 | 130 | 36 | 102 | 16 | 15 | 21 | 51.2 | 49.2 | 19 | M14 | UCF208 | F208 | UC208 | 29.1 | 17.8 | 14.0 | 1.9 | 2.3 |
| 150 | 40 | 112 | 19 | 17 | 23 | 56 | 52 | 19 | M16 | UCF308 | F308 | UC308 | 40.7 | 24.0 | 13.2 | 3.1 | 3.6 | |
| 45 | 137 | 38 | 105 | 16 | 16 | 22 | 52.2 | 49.2 | 19 | M14 | UCF209 | F209 | UC209 | 34.1 | 21.3 | 14.0 | 2.2 | 2.6 |
| 160 | 44 | 125 | 19 | 18 | 25 | 60 | 57 | 22 | M16 | UCF309 | F309 | UC309 | 48.9 | 29.5 | 13.3 | 4.0 | 4.6 | |
| 50 | 143 | 40 | 111 | 16 | 16 | 22 | 54.6 | 51.6 | 19 | M14 | UCF210 | F210 | UC210 | 35.1 | 23.3 | 14.4 | 2.5 | 3.0 |
| 175 | 48 | 132 | 23 | 19 | 28 | 67 | 61 | 22 | M20 | UCF310 | F310 | UC310 | 62.0 | 38.3 | 13.2 | 5.1 | 5.9 | |
| 55 | 162 | 43 | 130 | 19 | 18 | 25 | 58.4 | 55.6 | 22.2 | M16 | UCF211 | F211 | UC211 | 43.4 | 29.4 | 14.4 | 3.4 | 4.0 |
| 185 | 52 | 140 | 23 | 20 | 30 | 71 | 66 | 25 | M20 | UCF311 | F311 | UC311 | 71.6 | 45.0 | 13.2 | 5.6 | 6.5 | |
| 60 | 175 | 48 | 143 | 19 | 18 | 29 | 68.7 | 65.1 | 25.4 | M16 | UCF212 | F212 | UC212 | 52.4 | 36.2 | 14.4 | 4.2 | 5.0 |
| 60 | 195 | 56 | 150 | 23 | 22 | 33 | 78 | 71 | 26 | M20 | UCF312 | F312 | UC312 | 81.9 | 52.2 | 13.2 | 6.9 | 8.1 |
| 65 | 187 | 50 | 149 | 19 | 22 | 30 | 69.7 | 65.1 | 25.4 | M16 | UCF213 | F213 | UC213 | 57.2 | 40.1 | 14.4 | 5.2 | 6.0 |
| 208 | 58 | 166 | 23 | 22 | 33 | 78 | 75 | 30 | M20 | UCF313 | F313 | UC313 | 92.7 | 59.9 | 13.2 | 7.8 | 8.9 | |
| 70 | 193 | 54 | 152 | 19 | 22 | 31 | 75.4 | 74.6 | 30.2 | M16 | UCF214 | F214 | UC214 | 62.2 | 44.1 | 14.5 | 5.9 | 6.8 |
| 226 | 61 | 178 | 25 | 25 | 36 | 81 | 78 | 33 | M22 | UCF314 | F314 | UC314 | 104 | 68.2 | 13.2 | 10.1 | 11.2 | |
| 75 | 200 | 56 | 159 | 19 | 22 | 34 | 78.5 | 77.8 | 33.3 | M16 | UCF215 | F215 | UC215 | 67.4 | 48.3 | 14.5 | 6.4 | 7.4 |
| 236 | 66 | 184 | 25 | 25 | 39 | 89 | 82 | 32 | M22 | UCF315 | F315 | UC315 | 113 | 77.2 | 13.2 | 116 | 12.9 | |
| 80 | 208 | 58 | 165 | 23 | 22 | 34 | 83.3 | 82.6 | 33.3 | M20 | UCF216 | F216 | UC216 | 72.7 | 53.0 | 14.6 | 7.3 | 8.5 |
| 250 | 68 | 196 | 31 | 27 | 38 | 90 | 86 | 34 | M27 | UCF316 | F316 | UC316 | 123 | 86.7 | 13.3 | 12.8 | 14.2 | |
| 85 | 220 | 63 | 175 | 23 | 24 | 36 | 87.6 | 85.7 | 34.1 | M20 | UCF217 | F217 | UC217 | 84.0 | 61.9 | 14.5 | 8.9 | 10.3 |
| 260 | 74 | 204 | 31 | 27 | 44 | 100 | 96 | 40 | M27 | UCF317 | F317 | UC317 | 133 | 96.8 | 13.3 | 15.3 | 16.9 | |
| 90 | 235 | 68 | 187 | 23 | 25 | 40 | 96.3 | 96 | 39.7 | M20 | UCF218 | F218 | UC218 | 96.1 | 71.5 | 14.5 | 11.4 | 12.9 |
| 280 | 76 | 216 | 35 | 30 | 44 | 100 | 96 | 40 | M30 | UCF318 | F318 | UC318 | 143 | 107 | 13.3 | 18.9 | 20.8 | |
| 95 | 290 | 94 | 228 | 35 | 30 | 59 | 121 | 103 | 41 | M30 | UCF319 | F319 | UC319 | 153 | 119 | 13.3 | 21.6 | 23.8 |
| 100 | 310 | 94 | 242 | 38 | 32 | 59 | 125 | 108 | 42 | M33 | UCF320 | F320 | UC320 | 173 | 141 | 13.2 | 25.8 | 28.6 |
| 105 | 310 | 94 | 242 | 38 | 32 | 59 | 127 | 112 | 44 | M33 | UCF321 | F321 | UC321 | 184 | 153 | 13.2 | 30.2 | 33.2 |
| 110 | 340 | 96 | 266 | 41 | 35 | 60 | 131 | 117 | 46 | M36 | UCF322 | F322 | UC322 | 205 | 180 | 13.2 | 35.3 | 41.7 |
| 120 | 370 | 110 | 290 | 41 | 40 | 65 | 140 | 126 | 51 | M36 | UCF324 | F324 | UC324 | 207 | 185 | 13.5 | 47.3 | 52.1 |
| 130 | 410 | 115 | 320 | 41 | 45 | 65 | 146 | 135 | 54 | M36 | UCF326 | F326 | UC326 | 229 | 214 | 13.6 | 65.5 | 71.6 |
| 140 | 450 | 125 | 350 | 41 | 55 | 75 | 161 | 145 | 59 | M36 | UCF328 | F328 | UC328 | 253 | 246 | 13.6 | 80.4 | 89 |
| Shaft Dimensions (mm) | Size (mm) | Nominal Designation Of Mounting Bolts | Nominal Code Of The Component | Applicable to: Bearing housings (general grade) | Bearing Nominal Code | Applicable bearings Basic rated load (kN) | Coefficient | Applicable lock sleeve | Reference Component Weight (kg) | ||||||||||
| d1 | L | A | J | N | A1 | A2 | Ao | B1 | de(最小) | Cr | Cor | fo | ordinary products | cast iron | |||||
| 20 | 95 | 27 | 70 | 12 | 13 | 16 | 36 | 35 | 30 | M10 | UKF205 | F205 | UK205 | 14.0 | 7.85 | 13.9 | H2305X | 0.87 | 1.1 |
| 110 | 29 | 80 | 16 | 13 | 16 | 37.5 | 35 | 一 | M14 | UKF305 | F305 | UK305 | 21.2 | 10.9 | 12.6 | H2305X | 1.4 | 1.7 | |
| 25 | 108 | 31 | 83 | 12 | 13 | 18 | 39.5 | 38 | 36 | M10 | UKF206 | F206 | UK206 | 19.5 | 11.3 | 13.9 | H2306X | 1.3 | 1.6 |
| 125 | 32 | 95 | 16 | 15 | 18 | 41 | 38 | – | M14 | UKF306 | F306 | UK306 | 26.7 | 15.0 | 13.3 | H2306X | 1.9 | 2.2 | |
| 30 | 117 | 34 | 92 | 14 | 15 | 19 | 43 | 43 | 41 | M12 | UKF207 | F207 | UK207 | 25.7 | 15.4 | 13.9 | H2307X | 1.6 | 2.0 |
| 135 | 36 | 100 | 19 | 16 | 20 | 45.5 | 43 | M16 | UKF307 | F307 | UK307 | 33.4 | 19.3 | 13.2 | H2307X | 2.3 | 2.8 | ||
| 35 | 130 | 36 | 102 | 16 | 15 | 21 | 48 | 46 | 46 | M14 | UKF208 | F208 | UK208 | 29.1 | 17.8 | 14.0 | H2308X | 1.9 | 2.3 |
| 150 | 40 | 112 | 19 | 17 | 23 | 50.5 | 46 | – | M16 | UKF308 | F308 | UK308 | 40.7 | 24.0 | 13.2 | H2308X | 3.1 | 3.6 | |
| 40 | 137 | 38 | 105 | 16 | 16 | 22 | 51 | 50 | 52 | M14 | UKF209 | F209 | UK209 | 34.1 | 21.3 | 14.0 | H2309X | 2.3 | 2.8 |
| 160 | 44 | 125 | 19 | 18 | 25 | 55 | 50 | – | M16 | UKF309 | F309 | UK309 | 48.9 | 29.5 | 13.3 | H2309X | 4.1 | 4.7 | |
| 45 | 143 | 40 | 111 | 16 | 16 | 22 | 52 | 55 | 58 | M14 | UKF210 | F210 | UK210 | 35.1 | 23.3 | 14.4 | H2310X | 2.6 | 3.1 |
| 175 | 48 | 132 | 23 | 19 | 28 | 60 | 55 | – | M20 | UKF310 | F310 | UK310 | 62.0 | 38.3 | 13.2 | H2310X | 5.1 | 5.9 | |
| 50 | 162 | 43 | 130 | 19 | 18 | 25 | 57 | 59 | 64 | M16 | UKF211 | F211 | UK211 | 43.4 | 29.4 | 14.4 | H2311X | 3.5 | 4.1 |
| 185 | 52 | 140 | 23 | 20 | 30 | 64 | 59 | 一 | M20 | UKF311 | F311 | UK311 | 71.6 | 45.0 | 13.2 | H2311X | 5.9 | 6.8 | |
| 55 | 175 | 48 | 143 | 19 | 18 | 29 | 65.5 | 62 | 69 | M16 | UKF212 | F212 | UK212 | 52.4 | 36.2 | 14.4 | H2312X | 4.1 | 4.9 |
| 195 | 56 | 150 | 23 | 22 | 33 | 69.5 | 62 | 一 | M20 | UKF312 | F312 | UK312 | 81.9 | 52.2 | 13.2 | H2312X | 6.8 | 8.0 | |
| 60 | 187 | 50 | 149 | 19 | 22 | 30 | 67.5 | 65 | 74 | M16 | UKF213 | F213 | UK213 | 57.2 | 40.1 | 14.4 | H2313X | 5.1 | 6.0 |
| 60 | 208 | 58 | 166 | 23 | 22 | 33 | 71.5 | 65 | 一 | M20 | UKF313 | F313 | UK313 | 92.7 | 59.9 | 13.2 | H2313X | 7.9 | 9.0 |
| 65 | 200 | 56 | 159 | 19 | 22 | 34 | 74.5 | 73 | 85 | M16 | UKF215 | F215 | UK215 | 67.4 | 48.3 | 14.5 | H2315X | 6.5 | 7.5 |
| 236 | 66 | 184 | 25 | 25 | 39 | 81.5 | 73 | M22 | UKF315 | F315 | UK315 | 113 | 77.2 | 13.2 | H2315X | 11.7 | 13.1 | ||
| 70 | 208 | 58 | 165 | 23 | 22 | 34 | 78.5 | 78 | 90 | M20 | UKF216 | F216 | UK216 | 72.7 | 53.0 | 14.6 | H2316X | 7.6 | 8.9 |
| 250 | 68 | 196 | 31 | 27 | 38 | 82.5 | 78 | M27 | UKF316 | F316 | UK316 | 123 | 86.7 | 13.3 | H2316X | 12.9 | 14.5 | ||
| 75 | 220 | 63 | 175 | 23 | 24 | 36 | 82.5 | 82 | 96 | M20 | UKF217 | F217 | UK217 | 84.0 | 61.9 | 14.5 | H2317X | 9.0 | 10.4 |
| 260 | 74 | 204 | 31 | 27 | 44 | 92 | 82 | – | M27 | UKF317 | F317 | UK317 | 133 | 96.8 | 13.3 | H2317X | 15.2 | 17.0 | |
| 80 | 235 | 68 | 187 | 23 | 25 | 40 | 89.5 | 86 | 102 | M20 | UKF218 | F218 | UK218 | 96.1 | 71.5 | 14.5 | H2318X | 114 | 13.0 |
| 280 | 76 | 216 | 35 | 30 | 44 | 92 | 86 | M30 | UKF318 | F318 | UK318 | 143 | 107 | 13.3 | H2318X | 19.0 | 21.1 | ||
| 85 | 290 | 94 | 228 | 35 | 30 | 59 | 111 | 90 | – | M30 | UKF319 | F319 | UK319 | 153 | 119 | 13.3 | H2319X | 21.9 | 24.3 |
| 90 | 310 | 94 | 242 | 38 | 32 | 59 | 113 | 97 | – | M33 | UKF320 | F320 | UK320 | 173 | 141 | 13.2 | H2320X | 25.4 | 28.5 |
| 100 | 340 | 96 | 266 | 41 | 35 | 60 | 120 | 105 | – | M36 | UKF322 | F322 | UK322 | 205 | 180 | 13.2 | H2322X | 35.2 | 38.7 |
| 110 | 370 | 110 | 290 | 41 | 40 | 65 | 130.5 | 112 | – | M36 | UKF324 | F324 | UK324 | 207 | 185 | 13.5 | H2324X | 47.6 | 52.7 |
| 115 | 410 | 115 | 320 | 41 | 45 | 65 | 131.5 | 121 | – | M36 | UKF326 | F326 | UK326 | 229 | 214 | 13.6 | H2326X | 65.3 | 71.9 |
| 125 | 450 | 125 | 350 | 41 | 55 | 75 | 147.5 | 131 | – | M36 | UKF328 | F328 | UK328 | 253 | 246 | 13.6 | H2328X | 74.9 | 83.5 |








