1. High efficiency: 10-12 pcs/ minute. 
2. Interchange between lockstitch and chainstitch: Realizes two different stitches by changing the hook and looper to meet the needs of different processes.
3. Automation: Presser foot lifter, trimmer, sweep thread and curling folder.
4. Reinforce function: Dense stitch when ending to prevent off-line.
5. Synchronous feeding: upper-lower puller and needle feeding prevent the dense stitch on joint.
6. Cylinder bed: More suitable for sewing hemming on trousers.
Chainstitch
Lockstitch
		    
			
		    
			The Bottom Hemming Sewing Machine is suitable for hemming of jeans, casual pants and such other trousers.
| Max speed | 4000rpm | 
| Width of hemming | 12.7mm | 
| Perimeter of cylinder bed | 23cm | 
| Needle | Lockstitch: PDX5 | 
| Chainstitch | DVX57 | 
| Feeding | Upper and lower puller, needle feeding | 
| Category | |
| TS-63920-D4 | Lock stitch | 
| TS-63921-D4 | Chain stitch | 
| TS-63922-D4 | Interchange between lockstitch and chainstitch | 
| TS-63950-D4 | Fully automatic |