Let me quickly bring to your noticed that there are different juicers available in the market at different prices with great production power. However, if you do not have a juicer for whatever reasons; you can make do with your blender, but the blender must be with high speed. If you must get a good juice production!
Secondly, apart from the availability of a juicer or a blender; there are still some things which are very important. Your choice of fruits or vegetables to be blended.