The AC-172N-1790 is the newly-developed next-generation buttonholing indexer, which comes with the highly evaluated high-speed machine head LBH-1790 and is provided as standard with the preset mechanism to increase productivity. In addition, called sub-clamp mechanism helps achieve both accurate and consistent buttonholing quality.





Model NameAC-172N-1790
Machine head LBH-1790 (exclusive machine head for AC)
Max. sewing speed 4,200sti/min
Stitch length Max. 25mm
Cloth trimming length 6.4~19.1mm (1/4"~3/4" inch)
Feed direction Right (for men's garments) or left (for ladies' garments)
Number of patterns that
can be input
20 patterns
Number of buttonholes 1~20 pcs.

DP×5 #11J~#14J

(Needle installed at the time of delivery #11J)





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