The head assembly incorporates oil-free thread take-up levers and needle bars, eliminating fabriccontamination from oil stains; upper thread tension is electromagnetically controlled, enablingautomatic adjustment according to material thickness variations.
RB-1978-D4 RB-1978-D4-D4/H 
1
1
DBX1 11-18# DBX1 11-18# 
2 2 
0-5 0-5 
6-13 6-13 
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5000 5000 
630X290X580 630X290X580 
48/50 48/50
