Wheatgrass Juicers also known as Slow Speed juicers and Masticating Juicers are successful at juicing wheatgrass and leafy greens. Wheatgrass juicers can juice all types of fruit and vegetables but are the only ones capable of juicing wheat grass. They utilise a slow speed extraction usually between 70 and 160 RPM to prevent frictional heat and oxygen affecting the juice. There are different types of masticating juicers with different processes, they are 'Manual Juicers', 'Single Auger Juicers' and 'Twin Gear Juicers'.