| Specification | Steel NO. | HRC | Chemical composition % | ||||||
| C | Si | Mn | Mo | S | P | Cr | |||
| GB/T 18254 | Gcr 15 | 61-65 | 0.95~1.05 | 0.15~0.35 | 0.25~0.45 | below 0.08 | below 0.025 | below 0.025 | 1.40~1.65 | 
| Bearing No | Boundary dimensions(mm) | Mass(Kg) | |||
| d | D | B | |||
| 12 Series | 1200 | 10 | 30 | 9 | 0.033 | 
| 1201 | 12 | 32 | 10 | 0.04 | |
| 1202 | 15 | 35 | 11 | 0.049 | |
| 1203 | 17 | 40 | 12 | 0.072 | |
| 1204 | 20 | 47 | 14 | 0.116 | |
| 1205 | 25 | 52 | 15 | 0.138 | |
| 1206 | 30 | 62 | 16 | 0.217 | |
| 1207 | 35 | 72 | 17 | 0.317 | |
| 1208 | 40 | 80 | 18 | 0.414 | |
| 1209 | 45 | 85 | 19 | 0.457 | |
| 1210 | 50 | 90 | 20 | 0.515 | |
| 1211 | 55 | 100 | 21 | 0.692 | |
| 1212 | 60 | 110 | 22 | 0.879 | |
| 1213 | 65 | 120 | 23 | 1.13 | |
| 1214 | 70 | 125 | 24 | 1.24 | |
| 1215 | 75 | 130 | 25 | 1.33 | |
| 1216 | 80 | 140 | 26 | 1.65 | |
| 1217 | 85 | 150 | 28 | 2.06 | |
| 1218 | 90 | 160 | 30 | 2.51 | |
| 1219 | 95 | 170 | 32 | 3.1 | |
| 1220 | 100 | 180 | 34 | 3.7 | |
| 1221 | 105 | 190 | 36 | 4.34 | |
| 1222 | 110 | 200 | 38 | 5.15 | |
| 12K Series | 1203K | 17 | 40 | 12 | 0.076 | 
| 1204K | 20 | 47 | 14 | 0.114 | |
| 1205K | 25 | 52 | 15 | 0.135 | |
| 1206K | 30 | 62 | 16 | 0.213 | |
| 1207K | 35 | 72 | 17 | 0.312 | |
| 1208K | 40 | 80 | 18 | 0.407 | |
| 1209K | 45 | 85 | 19 | 0.448 | |
| 1210K | 50 | 90 | 20 | 0.504 | |
| 1211K | 55 | 100 | 21 | 0.679 | |
| 1212K | 60 | 110 | 22 | 0.864 | |
| 1213K | 65 | 120 | 23 | 1.11 | |
| 1215K | 75 | 130 | 25 | 1.31 | |
| 1216K | 80 | 140 | 26 | 1.62 | |
| 1217K | 85 | 150 | 28 | 2.03 | |
| 1218K | 90 | 160 | 30 | 2.47 | |
| 1219K | 95 | 170 | 32 | 3.05 | |
| 1220K | 100 | 180 | 34 | 3.64 | |
| 1222K | 110 | 200 | 38 | 5.07 | |
| 1224K | 120 | 215 | 40 | 5.9 | |
| 13 Series | 1315 | 75 | 160 | 37 | 3.55 | 
| 1316 | 80 | 170 | 39 | 4.17 | |
| 1317 | 85 | 180 | 41 | 4.96 | |
| 1318 | 90 | 190 | 43 | 5.78 | |
| 1319 | 95 | 200 | 45 | 6.69 | |
| 1320 | 100 | 215 | 47 | 8.3 | |
| 1321 | 105 | 225 | 49 | 10 | |
| 1322 | 110 | 240 | 50 | 11.8 | |
| 13K Series | 1304K | 20 | 52 | 15 | 0.158 | 
| 1305K | 25 | 62 | 17 | 0.251 | |
| 1306K | 30 | 72 | 19 | 0.377 | |
| 1307K | 35 | 80 | 21 | 0.492 | |
| 1308K | 40 | 90 | 23 | 0.698 | |
| 1309K | 45 | 100 | 25 | 0.938 | |
| 1310K | 50 | 110 | 27 | 1.18 | |
| 1311K | 55 | 120 | 29 | 1.56 | |
| 1312K | 60 | 130 | 31 | 1.93 | |
| 1313K | 65 | 140 | 33 | 2.38 | |
| 1315K | 75 | 160 | 37 | 3.5 | |
| 1316K | 80 | 170 | 39 | 4.11 | |
| 23 Series | 2312 | 60 | 130 | 46 | 2.59 | 
| 2313 | 65 | 140 | 48 | 3.2 | |
| 2314 | 70 | 150 | 51 | 3.92 | |
| 2315 | 75 | 160 | 55 | 4.78 | |
| 2316 | 80 | 170 | 58 | 5.65 | |
| 2317 | 85 | 180 | 60 | 6.55 | |
| 2318 | 90 | 190 | 64 | 7.75 | |
| 2319 | 95 | 200 | 67 | 9.05 | |
| 2320 | 100 | 215 | 73 | 11.5 | |
| 2321 | 105 | 225 | 77 | 13.2 | |
| 2322 | 110 | 240 | 80 | 15.8 | |
| 23K Series | 2304K | 20 | 52 | 21 | 0.201 | 
| 2305K | 25 | 62 | 24 | 0.326 | |
| 2306K | 30 | 72 | 27 | 0.485 | |
| 2307K | 35 | 80 | 31 | 0.653 | |
| 2308K | 40 | 90 | 33 | 0.895 | |
| 2309K | 45 | 100 | 36 | 1.2 | |
| 2310K | 50 | 110 | 40 | 1.59 | |
| 2311K | 55 | 120 | 43 | 2.05 | |
| 2312K | 60 | 130 | 46 | 2.52 | |
| 2313K | 65 | 140 | 48 | 3.12 | |
| 2315K | 75 | 160 | 55 | 4.66 | |
| 2316K | 80 | 170 | 58 | 5. | |