Hook of Industrial Sewing Machine
The hook tip and the needle's eye on industrial sewing machines must be adjusted in time. From this parameter are depended the appearance of many defects such as skipping stitches and the breakage of the upper and lower threads, etc.
Note: Different types of sewing machines need a different process to set the timing. Here you will find the tips on how to fix hook timing on straight stitch industrial sewing machine.
For this article, an industrial sewing machine was used industrial sewing machine Textima 8332.
Bobbin case care and tension adjustment
Bobbin case of industrial sewing machine looks like bobbin case of home sewing machine having the vertical oscillating shuttle hook system. But there is one difference. Such a bobbin case does not have 'the finger'.
With this screw you can to change the tension of lower thread. Try to less often adjust the thread tension using this screw. And do not rotate the screw more than half a turn.
Bobbins of industrial sewing machine have one difference also. They are slightly thinner than coils for household sewing machines.
The industrial sewing machine works at high speeds and if the needle touches the wall of the cap then it will be collapsed. Do not use damaged bobbin cases.
Note: Many models of industrial sewing machines have interchangeable bobbin cases.
To make the metal bobbin inside the cap rotate silently and easily I recommend to place on the pad of bobbin case the gasket. The gasket you can cut from paper (plastic file) and add a drop of oil.
How to fix the hook timing
Remove the presser foot and needle plate.
Tip: When you remove any parts of sewing machine, be sure to clean them of dust and dirt.
To make it more convenient to adjust the hook timing I recommend to remove the feed dogs.
Why does my top thread keep breaking?
If your sewing machine keep breaking the upper threading I recommend look on this place.
This clearance must be such that the top thread must pass freely in this place.
The width of this clearance is regulated here, by the screw.
Place the tip of the hook 1/16” above the eye
For most machines, place the tip of the hook 1/16" above the eye of an industrial size needle.
It is very difficult to establish this gap with a ruler.
Visually, this segment can be compared with the size of the needle eye.
Here is the second orientation that can help you to correctly determine the position of the hook tip. Look at the position of the needle eyelet inside the hook device. The eye of the needle should be clearly visible.
The tip of the hook should pass as close as possible to the needle without touching its surface.
How to move the tip of the hook
The movement of the shuttle device along the axis and around the axis can be done after loosening the two screws on the body of the hook device.
Note: These screws must be tightened well.
Note that many models of industrial sewing machines have the ability to lower or raise the needle. To do this, you need to lift (or lower) the needle bar with the needle together.
This industrial sewing machine (Textima 8332) has no such possibility and the sewing needle has only the fixed position.
Note that all industrial sewing machines have a round shank and it do not have a flat side like the household sewing needles.
The needle must be inserted until it stops, tighten the screw securely with a screwdriver.
English isn't my first language, so please excuse any mistakes and help correct them.
E-mail for sending is on the contact page.
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