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| Corresponding Rig Type | ZJ40/2250DB | ZJ50/3150DB | ZJ70/4500DB | ZJ90/6750DB |
| The Travelling Block Type | YC225 | YC315 | YC450 | YC675 |
| Technical Specifications | ||||
| Max. hook load (kN) | 2250 | 3150 | 4500 | 6750 |
| Number of Sheaves | 5 | 6 | 6 | 7 |
| OD of Sheaves mm(in) | 1120 (44) | 1270 (50) | 1524 (60) | 1524 (60) |
| Wire rope diameter mm(in) | 32 (1 1/4) | 35 (1 3/8) | 38 (1 1/2) | 45 (1 3/4) |
| Outline dimension(L×W×H) mm | 2294×1190×630 | 2680×1350×974 | 3075×1600×800 | 3527×1003×1000 |
| Weight kg | 3805 | 6842 | 8135 | 15430 |
Structural characteristics
1.Sheaves with API 8C rope trough, if quenching
2.Quenched and tempered alloy steel shaft with single bearing grease channel
3.Grease lubricated double cone roller bearings
4.The tour car side thick section steel plate, has a large enough mass.
5.The API conforms to the 8C specification, a API marker.