The slewing bearing (slewing ring) of a truck-mounted crane is the core joint connecting the truck chassis and the boom. It allows for 360-degree full rotation and withstands axial, radial, and overturning forces during lifting. The slewing bearing is made of high-strength alloy steel, offering high load-bearing capacity and precision, ensuring stable operation under heavy loads. The truck-mounted crane slewing bearing is a key component determining lifting flexibility, operational efficiency, and safety levels.
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| Item | Crane Model | OUTLINE DIMENSIONS | OUTER RING | INNER RING | TEETH QTY | Weight | ||||||
| Da | di | H | Ho | na | Bo | Hi | ni | Bi | Z2 | KG | ||
| 1 | TADANO Z 300 | 240 | 456 | 76 | 66 | 10 | M18 | 54 | 19 | φ20 | 74 | 42 |
| 2 | UNIC 330 | 240 | 456 | 76 | 66 | 11 | M16 | 54 | 19 | φ20 | 74 | 42 |
| 3 | JET 35 | 260 | 460 | 84 | 70 | 14 | φ18 | 64 | 17 | φ18 | 90 | 46 |
| 4 | Kato 45 | 280 | 522 | 81 | 70 | 9 | M20 | 58 | 23 | φ21 | 85 | 65 |
| 5 | unic 500 | 295 | 546 | 78.5 | 71 | 14 | M18 | 61 | 23 | φ22 | 89 | 71 |
| 6 | kanglim 1256 | 340 | 594 | 104 | 89 | 14 | M20 | 87 | 23 | φ21 | 97 | 110 |
| 7 | HTS1756 | 352 | 600 | 100 | 85 | 12 | M22 | 79 | 23 | φ22 | 98 | 108 |
| 8 | soosan 736 | 352 | 600 | 99 | 84 | 12 | M22 | 79 | 23 | φ23 | 98 | 108 |
| 9 | SS1926 | 369 | 612 | 90 | 75 | 16 | M20 | 67 | 23 | φ21 | 100 | 103 |
| 10 | CSS176M | 370 | 624 | 105 | 90 | 18 | M20 | 88 | 23 | φ22 | 102 | 110 |
| 11 | SOOSAN 746 | 430 | 660 | 100 | 84 | 15 | M22 | 79 | 23 | φ23 | 108 | 105 |
| 12 | Kanglim ks2056 | 430 | 660 | 105 | 85 | 14 | M22 | 80 | 23 | φ23 | 107 | 105 |
| 13 | SOOSAN 915m | 495 | 736 | 95 | 75 | 21 | M22 | 75 | 29 | φ23 | 90 | 115 |
| 14 | Hiab 190 | 506 | 732 | 85 | 70 | 26 | M20 | 65 | 16 | φ22 | 120 | 97 |
| 15 | Aichi 502 | 600 | 816 | 70 | 59 | 24 | φ19 | 65 | 22 | M18 | 134 | 98 |
| 16 | AICHI 507 | 600 | 816 | 66 | 58 | 24 | φ19 | 60 | 26 | M18 | 134 | 96 |
| 17 | DT600 | 608 | 816 | 58 | 50 | 30 | φ18 | 50 | 29 | M18 | 134 | 80 |
| 18 | AICHI 705 | 675 | 863 | 82 | 58 | 24 | M18 | 64 | 24 | φ19 | 142 | 93 |
| 19 | SOOSAN SCS1616 | 700 | 976 | 95 | 85 | 26 | M22 | 81 | 35 | φ22 | 96 | 208 |
| 20 | TS70 Model 2 | 889 | 671 | 65 | 55 | 34 | φ20 | 55 | 23 | φ20？ | 125 | 98 |
| 21 | SR250 | 1408 | 1110 | 80.5 | 70 | 48 | φ26 | 70 | 44 | φ26 | 113 | 280 |
| 22 | TR250-M5 | 1415 | 1143 | 95 | 80 | 47 | φ24 | 76 | 48 | φ24 | 116 | 295 |
| 23 | TG500 | 1530 | 1164 | 122 | 108 | 39 | φ26 | 110 | 40 | φ26 | 118 | 585 |
| 24 | KR35H | 1410 | 1100 | 95 | 80 | 42 | φ26.5 | 80 | 48 | φ26 | 112 | 330 |
| 25 | Kanglim 1255 | 804.8 | 544 | 90 | 78 | 22 | M22 | 72 | 35 | φ22 | 99 | 140 |
| 26 | Kanglim 1256G | 594 | 340 | 104 | 89 | 14 | M20 | 87 | 23 | φ21 | 97 | 110 |
| 27 | Soosan 1015 | 900 | 640 | 84 | 72 | 25 | M22 | 68 | 24 | φ23 | 82 | 152 |
| 28 | Kato SS500 | 1552 | 1201 | 120 | 105 | 54 | φ26 | 105 | 54 | φ26 | 122 | 540 |
