1.Adopt two stright needles,vertical-axis roating hook with self-lubricating feature for catching thread loops and sliding can take up to produce two lines of double lockstitch.

2.The needle bar can be engaged and disengaged mechanicallu and arm shaft and hook shaft are supported by ball bearings.

3.Its provided with synchronous tooth belt for driving and plunger pump for lubricating,and knob-type stitch regulator and lever type reverse feeding mechanism.

4.The sew thread pulls back spring in the bobbin case and guarantees the harmony between surfuce thread and bottom thread,Besides it features synchronized feeding of needle ar and feed dog.