r r r r 特点及用途r r r 1. 大旋梭特厚料上下送料平缝机是单直针 .连杆挑线 ,高精度螺旋伞齿轮传动 ,大旋梭勾线 .由于采用特殊的上送料机构 ,所以它除了具有一般上下送料缝纫机的各项性能外 ,其**大的特点是对特厚缝料和较粗的缝线也能自如的进行 .该系列产品广泛的使用于箱包、皮革、沙发、帐篷、凉席等行业。r r r r r r Has 250mm long arm r r r Equipped with an extra lage horizontal roating hook and bobbin for use with thick threads. r r r Upper and lower drop feed mechanism with reverse stitch ensures perfect and fine lockstitches on such thick material from 3mm to 12mm in thickness without any slippage of the upper and lower pieces of material. r r r Specially designed for extra heavy work such as thick leather,tarpwulines,horse rugs harnesses,vehicle upholstery,shade sails,water-proof cloth,travel bags ,suit cases,thich cloth and other bulky material. r r r r r r 规格 Specifications：r r r **高缝速：MAX.SEWING SPEED:1200 s.p.mr r r **大缝目：MAX.STITCHLENGTH:13.0mmr r r 押脚提升：LIFT OF PRESSER FOOT:20mmr r r 使用机针：NEEDLE SYSTEM:PY*1r r r 缝制空间：WORKING AREA:508*190mmr r r 针棒行程：NEEDLE BAR STROKE:56mmr r