3. Versatility Modern industrial overlockers can handle various types of fabrics, including knits, wovens, and stretch materials. This versatility makes them ideal for a range of applications, from simple hems to more complex garment constructions.

2. Inserting the needle To insert a twin stretch needle, simply remove the regular needle from your machine and insert the twin needle in its place. Make sure that the flat side of the needle is facing towards the back of the machine and that the needles are properly seated in the needle clamp.

First and foremost, durability is crucial. Leather and canvas are tough materials that can put a lot of strain on a sewing machine. Look for a machine with a strong, sturdy frame that can withstand the heavy-duty use. Metal frames are usually more durable than plastic ones, so keep that in mind when making your selection.

Furthermore, some machines for sewing leather bags are equipped with advanced features such as automatic thread cutters, needle positioners, and programmable stitch patterns. These features help to streamline the sewing process and make it easier for users to create complex designs and details on their leather bags.

The material of the sealing lip is chosen according to the liquid to be sealed and the rotational speed. For larger shafts, an NBR sealing lip can cope with surface speeds of up to 10-12 m/s, while an FKM lip is suitable for speeds of up to 35-38 m/s. 

FKM or FPM, which is in well-known brand Viton™, can withstand higher liquid temperatures of up to 180 ˚C. FKM is highly resistant to strong acids and bases, as well as to synthetic oils and greases. Glycol-based oil and grease, however, can also damage FKM.

Material Code ISO 1629

In this way, selecting the appropriate oil seal will lead to machine design that is economically superior!

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