When your fruits or vegetables are put into a centrifugal juicer, they are grated into smaller slices and pieces through sharp teeth-like blades. These blades are usually found on the bottom of a basket-like part, such as the Nutridisk of the Breville 800JEXL, and less efficient than the augers found on masticating juicers. Juice is extracted during this process by through the pressure of centrifugal force as the ground-up parts of the fruits and vegetables are pressed against walls of a filter. The faster these juicers spin, the greater the amount of force applied during this process, and the great the amount of juice that is extracted. A typical Centrifugal juicer will have a motor with 800 watts of power or more spin at nearly 15,000 RPM and are regarded as being very noisy. The juices produced by these juicers have shorter shelf lives due to increased aeration associated with centrifugal separation processes.

Considering the 15-year warranty on the Omega J8004 model’s motor and parts, we think this is the best value juicer you can get compared with cheaper models with shorter warranties. Although its price is more palatable than the Tribest’s, there are some trade-offs. First, the J8004 is quite big, requiring a 16-by-7-inch space on the counter. It also isn’t great with softer, juicy fruits, which get gummy and block the juicer; you’ll need to alternate adding different types of produce when juicing with this machine to keep it running. And, as we mentioned earlier, its feed tube is an inch narrower than the Tribest’s, which makes a difference in how much prep work you need to do with vegetables. Because the J8004 is a budget machine, you’ll save about $150 up front, but you may lose some of those savings in juice left behind in the pulp you toss when juicing things like kale. Compared with the rest of the competition, however, we still think the J8004 extracts more juice from produce.

The gist: The Omega is the creme-de-la-creme of masticating (slow-speed) juicers. Since it processes at a slower speed, you won't miss out on any nutrients. You can juice anything from fruits and vegetables to leafy greens— but it doesn't stop there. The Omega will also turn nuts into nut butter (homemade peanut butter anyone?), grind coffee beans, make pasta, frozen desserts, baby food... to be honest, we're not sure there's much it can't do. Additionally, its slow speed method makes for a super quiet juicing experience.   
These are also manual citrus juicers. They have an arm on left/right side that you have to pull down to force the juice out of the fruit. The mechanism is quite simple. You put a half-cut fruit on the bottom squeezing part and then use the handle to pull down the top squeezing part onto that forcefully to press the juice out. The arms are mostly made out of metal and on some low-cost models they can break with undue force. They are also known as citrus presses because there is no reaming action involved in it.
And the Tribest Slowstar doesn’t just juice. It also comes with a “homogenizing” mincer attachment that grinds without extracting liquid—useful for making sorbets, nut butters, and more. I haven’t used the machine for anything other than making juice, so I can’t attest to its food-chopping and frozen-fruit-sorbet-making abilities, but you can see it in action in this DiscountJuicers.com video. The separate bowl attachment fits onto the base, using the auger to pulverize the food and push it through a large chute without a screen.
Choose from five speed settings by turning the control dial with the blue LED light ring, then watch as freshly extracted juice flows effortlessly from the anti-drip adjustable flow spout. The thoughtfully designed appliance also provides an exclusive easy unlock and lift system, a filter basket specially designed to reduce foam, and a high-quality design that runs quietly--no need to wake up the whole family when getting an early start on the day.
The Omega VSJ843 is one of the slowest and quietest machines we’ve tested, and it produces juices without much foam. The VSJ843 produced almost as much green juice as our top pick, the high-yielding Tribest. So if you’re a devoted green juicer, you might prefer this Omega to our pick. However, for most people, its higher price, slightly lower yields on carrot-apple juice, and lack of versatility make it a second choice to our top pick.
The Hurom comes with a lidded pitcher for collecting juice, but its slow-turning auger produced so little splatter that we also had no problem putting our own glass directly under the juice spout. Clean juicing makes for means you’re not beholden to the Hurom’s pitcher, making it easier to juice straight into your to-go cup and reducing counter clean-up. (When we tried this with the Juiceman, we ended up with a foot-wide splatter radius.)