Yes, you can use a regular needle in an overlocker, but there are some things to keep in mind. First, the overlocker needle is slightly different than a regular needle. It has a wider eye and shorter scarf. This helps to prevent skipped stitches and tension problems. Second, when using a regular needle in an overlocker, be sure to use the correct size for your machine.Third, it is important to remember that an overlocker sews at a higher speed than a regular sewing machine. This means that the needle is under more stress and can break more easily. So be sure to use a good quality needle that is designed for high speed sewing.