| Model | UN254 |
| Max.speed | 2,800rpm |
| Stitch Type | Lock-stitch |
| Needle Bar Stroke | 45.7 mm |
| Needle Type | DPX17(No.21#)，19-21# |
| Hook | Horizontal, 1.8 times rotating |
| Presser Foot Lift Height | 21 mm |
| Stitch Number | 28,36,42(selectable via operation panel) |
| Stitch Distance | 40-70 mm(1-3/7″ to 2-3/4″) |
| Tacking Stitch Length | 7-22 mm (9/32″-55/64″),adjustable by 0.1 mm |
| Tacking Stitch Width | 1-3.2 mm (3/64″_1/8″), adjustable by 0.1 mm |
| Memory Pattern Capacity | 99 patterns |
| Loop Width | 9-18 mm |
| Finished Loop Length | 48-78 mm(1-57/64″ to 3-5/64″) |
| Operate Time | 1.2 seconds per loop (28 stitches) |
| Front Hook Location | Motor-driven positioning |
| Bobbin Winder | Electronic |
| Power Supply | Single phase 220V |
| Air Consumption | 0.5MPa,32N/min |
| Package | Wooden case 1220×880*1400 mm(1.5 cbm) |
| G/N weight | 235 kg /200 kg |
