Sewing machines with horizontal shuttle hook

Horizontal rotary shuttle

— the shuttle hooks of this type are easy to use: to thread the lower thread, you do not need to remove the bobbin case, just open the cover and install the bobbin directly into the hook. In addition, the top cover is often made transparent, which allows you to keep track of the rest of the bottom thread. At the same time, due to the rotational principle of operation, such a shuttle provides good speed and a minimum level of vibration and noise. Among the disadvantages of this option, one can note the difficulty in setting the thread tension: for this, usually, you have to unscrew a few bolts and remove the entire hook (whereas in vertical mechanisms the regulator is located on a quickly removed bobbin head). In addition, horizontal shuttles are not well suited for continuous sewing with coarse threads — such a thread can rub a groove in the case, after which the mechanism will have to be changed.