JK-752系列采用单直针杆、双弯针构成包边、包缝线迹。采用自动强注润滑机构。适用各种纺织，针织面料的缝纫。机器在高速运转中，针杆部极易发生渗油现象。因此，针杆部采用了强制回油装置既保证了针杆部的充分润滑，又可有效地防止针杆部的渗油现象。
JK-752 unique direct and double crooked form over-edging and over stitch auto-forcing-lubricating device. suitable for various knitting and fabric. adopting forcing-oil-back decice can both lubricate needle bar and prevent leaking, which in norma easily leaks at high speed.
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