Auger-style juicers, sometimes referred to as masticating or cold-press juicers, crush and mash the produce. They're typically more expensive, and can also take some getting used to as the augers can jam when grinding tough fruits and veggies. For this reason, every one we tested has a reverse button. The upside with this style is they tend to leave more healthful and fiber-rich pulp in the juice.
KitchenAid makes a juicing attachment for the Artisan stand mixer, the Masticating Juicer Attachment, as well as the standalone Maximum Extraction Juicer. In our research, we found that the Maximum Extraction Juicer didn’t compare to our picks in yields, extraction, build quality, or warranty (one-year limited). We don’t think it’s worth testing because it has too many shortcomings for its high price. The juicing attachment for the Artisan mixer is cheaper than a full juicer, but it gets poor reviews on Amazon for being hard to use and clean, and it seems to have difficulty with hard roots and vegetables.
Twin gear triturating machines are usually the most expensive juicers offering the best juice yield. Twin gear juicers employ two metal counter rotating gears to crush the juicing fodder. The precise tolerance of the gears allows the juice to flow through the gap between the gears while the large pulpy matter passes along the top of the gears and is discharged.
Celery will juice just fine, but for greens I use one of those slow juicers, the vertical version. The celery, raspberry, strawberry and things like kiwi come out better on slow juicers. It appears that “one size fits all” idea is only good for T-shirts, so considering one can get slow masticating juicers for much less then they used to cost there is no reason not to have one as well, so you can make nectar out of spinach and celery – it does taste weird but it is quite nutrition.
Single-auger juicers: An auger is like a big, threaded screw that pulls fruit or vegetables into the juicing chamber and presses the juice out. The auger can turn anywhere from 43 to 80 rpm, resulting in slowly produced, low-foam, low-temperature, high-volume, and nutrient-dense juice. Single-auger juicers can be oriented vertically or horizontally and are very versatile, good for greens and hard roots. Although vertical and horizontal juicers work on the same principle, vertical juicers have a smaller footprint and slightly larger yield. But vertical models are generally in the $300 to $400 range, so they’re not for the occasional juice drinker. They’re best suited for those who include fresh green juice as part of a daily routine and are concerned about low oxidation and maximum yield. And certain models, like our pick, have food-mincing and frozen-fruit-sorbet-making capabilities. All of our picks are single-auger juicers: the Tribest Slowstar and Omega VSJ843 are examples of vertical single-auger juicers, and the Omega J8004 is a horizontal single-auger juicer.
The Slowstar has a proprietary “Duoblade” auger, which has two cutting edges to chop and crush more with each rotation than single edges can. The motor uses a three-gear system that allows it to turn slowly but with plenty of torque; in our testing, we found that this translates to low-temperature juice with maximum yields from even low-moisture greens like kale.
With four smart fins on its stainless steel juicing cone, the 800CPXL can accommodate most types of citrus: from things as small as limes to larger fruits like grapefruits, and even some non-citrus like pomegranates. There’ll be a learning curve on how to place some of the awkwardly asymmetrical fruits onto the top of the cone so that they come out perfectly and evenly juiced, but you will most definitely get the hang of it after the 15th orange.
Warranty: No matter what kind of juicer you're getting, you want it to last. You should always get small appliances with some level of warranty, but normally the longer the warranty, the better. Not only does it show that a company is confident in its product, but it also means that if something does break, you won't have to shell out any extra cash.
Centrifugal juicers grind up produce with tiny teeth on a rapidly spinning basket. The juice is then forced through a fine mesh sieve. This method works quickly but tends to produce a lot of foam which some find unappealing or feel causes oxidization of their juice. Centrifugal juicers work best for juicing carrots, apples, and other hard fruits and vegetables versus high fiber leafy greens like wheatgrass and kale. They’re light, easy to set up and use, and easy to clean with removable dishwasher safe parts. These juicers are speedy but tend to be loud (which could be an issue if you’re juicing early in the morning while people are sleeping). They’re affordable and great for those just getting into juicing with quality models starting at $50.
We used three recipes to test how well each juicer handled hard produce (apples, carrots, etc.), soft produce (salad greens, fresh herbs, etc.) and almonds. In our test kitchen, we measured the results precisely, noted the amount of juice and pulp that emerged, and scored each juicer on performance. We also measured the noise in decibels, monitored spills or splatters, timed assembly and cleanup efforts, and noted such specifications as juicer dimensions and electrical cord length.
Whereas the Omega J8004 is a commercial-quality machine, the Omega NC800 is designed for household use. When it came to green juice, the output was almost identical. The carrot juice was a different story, though. The NC800 yielded only 12.3 ounces. John Kohler at DiscountJuicers.com said that this machine put out 15 percent more juice than its predecessor, but we found that it actually put out 25 percent less carrot juice than the J8004. The nice feature of this juicer is that it boasts a larger feed tube than its predecessor, which makes prep a little easier.