The lubrication of the sewing machine must use special sewing machine oil. The sewing machine should be fully oiled after one day or several days of continuous use. If the oil is added between uses, the machine should be left idling for a period of time to fully soak the oil and shake off the excess oil, and then use a clean soft cloth to cover the machine head Wipe clean with the countertop to avoid soiling the sewing material. Then thread and sew the rags, use the movement of the sewing thread to wipe off the excess oil stains, until there are no oil stains on the rags, and then proceed to the formal sewing.
General lubrication and refueling parts have
(1) Various oil holes on the machine head, such as: upper shaft lubrication and parts connected with the upper shaft; sliding rods on the overlock sewing machine, etc.;
(2) The internal parts of the panel and the movable parts connected to each part. Lubricate the presser foot bar, the needle bar and the parts connected to it;
(3) Clean the movable parts of the internal parts of the sewing machine and add less oil;
(4) Add grease parts to special parts;
(5) The special oil for the sewing machine in the oil pan is changed regularly to ensure that the oil quality of the sewing machine is lubricated and reduces wear.
The refueling amount of each refueling hole and refueling part does not need to be too much, just one or two drops. Periodic lubrication makes the sewing machine more durable and stable.
Lubricating oil volume adjustment for key parts
a. How to adjust the oil supply of the sewing machine rotary hook
Use this oil volume adjustment screw to adjust the confirmed oil volume method as follows. (Please refer to the installation manual of the sewing machine for details on the adjustment method).
(1) Raise the presser foot and let the rotary hook idling for more than 30 seconds;
(2) Put test paper such as copy paper under the rotating hook every 5 seconds. Please do not allow the paper to move during the measurement. In addition, please be careful not to let your fingers touch the high-speed rotating shuttle;
(3) At this time, linear oil stains will be left on the paper. According to the width of the oil trace, it can be judged whether the oil quantity is appropriate. It is normal for the width of the oil stain to be within 1 to 2 mm. Depending on the sewing product, the amount of oil may increase or decrease, but if it decreases too much, the hook will scorch when the machine is running at high speed. Please be aware of this.
b. Regarding the lower shaft fixing screw oil wick
When the adjustment screw fails to adjust the amount of oil, it is possible that rubbish etc. have blocked the oil wick of the lower shaft fixing screw. At this time, remove the hook, clean the oil wick or replace it with a new one. In addition, since the material of the lower shaft fixing screw is relatively soft, please pay attention when installing it.

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