
| Model | JK640-H7-D3 | JK640-H7-D4 |
| Needle quantity | 1 | |
| Thread quantity | 2 | |
| Needle type | DPx17 (14-22#) | |
| Max sewing speed | 2500spm | |
| Auto lifting foot | No | Yes |
| Height of presser foot | 8-16mm | |
| Sewing thickness | 8mm | |
| Feeding method | Up and bottom feeding | |
| Working space | 370x140mm(LxH) | |
| Packing size | 780x250x530mm | |
| Weight(N.W/G.W) | 47/54Kgs | |