4. Powerful Motor A heavy-duty sewing machine is typically equipped with a strong motor that allows for seamless sewing through thick materials. This power helps avoid skipped stitches and ensures a smooth sewing experience, even when tackling challenging upholstery projects or multiple layers of fabric.

Sewing has been an integral part of human civilization, allowing us to create and repair clothing, fabrics, and various textile products. Among the myriad of sewing techniques, lock sewing stands out as a reliable method for providing strength and durability to seams. This article explores the significance of lock sewing, its applications, and why it remains a favorite among seamsters and tailors.

 Oil seals go by many names, such as shaft seals, dirt seals, grease seals, lip seals, and many other variations of these. They are essentially simple devices used in rotary shaft equipment to prevent lubricant from escaping and for excluding contaminants such as dust, dirt and water. An oil seal’s most important function, however, is that it protects every type of ball, sleeve and roller bearing in the rotating shafts. The seals also prevent the integration of two different fluids that shouldn’t mix, such as oil and water.

ERIKS type M (type B according to the DIN standard) has a single metal casing and rubber sealing lip. Since the casing is made of metal, it must be fitted in a well-finished, undamaged groove. Large volumes of oil seals with metal casings are often cheaper, which is why they are often used as original equipment in machines. However, if an oil seal has to be replaced, types with a rubber exterior (type R or RST) are easier to fit. Type MST is similar to M and commonly used. The difference is the dust lip in the MST oil seal that prevents dust and dirt reaching the sealing lip, and extends its service life in dusty environments.