Siemens MC91100 citrus press

Siemens MC91100 citrus press
Siemens MC91100 citrus press

Juicing citrus fruit

Since I also own a twin gear juicer a citrus press's main function is to speed up the process of juicing citrus fruit.

It does this in two main ways - by being simpler and easier to clean - and by eliminating the need to peel the fruit before juicing.

An obvious downside is that you can only juice citrus fruit on it. If you want your orange juice mixed with juice from carrot, ginger and beetroot it's time to use another machine.

Citrus juice quality

A citrus press is fundamentally a low-RPM device. As such it won't introduce much froth or air into its juice, won't heat it up, and won't smash the enzymes in the juice into pieces.

A citrus press produces a slightly different quality of juice from the twin gear juicer. It doesn't really attempt to process the pith - and perhaps it doesn't try quite so hard to squeeze every last drop of juice out. As a result there's less froth in the resulting juice and - as a result of not being forced through such a fine mesh - there are more intact "juicy bits" in the resulting juice.

Siemens citrus press

The Siemens citrus press produces a good quality of juice. Its "sieve" stage is reasonably fine and will only let through relatively small particles.

It spins faster than other citrus presses I've seen - but probably nowhere near fast enough for the speed to be a concern regarding damage to the juice.


The Siemens citrus press comes in (essentially) five separate pieces:

  • Base unit with motor;
  • Juice collector and spout;
  • Reamer and sieve;
  • Top cover
  • Lid
    Citrus press - base unit
    The base
  • The base unit

    This seems well designed. The motor seems strong enough to perform the task. It rotates at a single speed - which seems about right to me.

    The cord storage in the base is neat.

    The unit is tall enough to fit a pint glass under the spout (when it is in the "down" position). I'm inclined to think that - if anything - the unit is unnecessarily tall - and that it is unnecessarily wide at the top.

    Citrus press - juice tray
    The juice tray
  • The juice collector and spout

    This seems like one of the admirable innovative features of the machine. The machine has a retractable spout - which can be tilted up and town to stem the flow of the juice. This is useful when peventing the machine from spilling juice onto the worksurface when the collecting jug is in use.

    The way this is implemented was initially suprising to me - the entire juice-collecting tray tilts backwards and forwards under the reamer and sieve.

    This allows the spout to be a simple open hole - rather than some sort of tap - which makes it easy to clean and simple to operate.

    My only problem with the implementation of the design is that the mountings seem to hold the tray in place a little too enthusiastically.

    Citrus press - reamer
    The reamer
  • The reamer

    The reamer has eight pronounced ridges. On the photograph above several of the six vertical supporting struts inside the reamer are also visible.

    The reamer has several distinctive features:

    • The top is rounded - rather than tapering to a point - the curvature at the top is similar to the curvature on a lime;
    • The ridges on the reamer form a slight clockwise screw;
    • The reamer seems quite tall and narrow.

    The lack of a point at the top and the reduced depth of the ridges at the top mean that it takes a little longer to penetrate the fruit - and also that at is less likely to take out whole chunks. The result seems to be that juicing is a little slower than with other machines - but that more juice is extracted.

    I think there's room for improvement in the shape of the reamer.

    The compelete lack of an upper point seems excessive to me.

    Also, the reamer is too narrow at the bottom - you wind up pressing sides of the fruit against the sides of the reamer one it a time instead of just pressing down.

    The reamer in in competition with the sieve space for base diameter, but with the current design there is room to spare there.

    Does the screw shape perform any useful function? In principle the angle might help to expell juice more rapidly by forcing it downwards - and that might speed up the juicing process. However the screw's mild pitch makes me suspect its role is currently primarily aesthetic. I would not rule out the possibility of a more pronounced screw performing this function more effectively in future designs.

    This juicer's reamer is a "one-size fits all design". This makes for easy cleaning - and there are no extra parts to keep track of - but it's not easy to make a single reamer that works well on limes and grapefruit - and some compromises are made because of that.

    Citrus press - seive
    The strainer
  • The sieve

    This is simple and well-designed. There's a strengthening ring at the top that produces a slight lip and blunts what would otherwide be a rapidly rotating sharp edge when running the machine with the cover off.

    Citrus press - top cover
    The top cover
  • The cover

    This is the most mysterious - and problematical - component. It seems designed to perform a range of functions.

    The cover:

    • ...hides the innards of the machine from sight during operation;
    • ...provides protection to the hand from the rotating innards of the machine;
    • ...stops pulp from flying off when centrifuging;
    • ...has an outer lip - that catches juice when centrifuging;
    • ...uses two central plastic guides (visible above) to press pulp down onto the strainer - and encourage it to go under the cover's inner lip;
    • ...catches splashes from the fruit while juicing a little better than the strainer does.

    There are two main problems with the cover:

    • It's another component to disassemble, wash and reassemble;
    • It gets in the way during operation of the machine;

    The cover does not seem to me to represent good design. Since simplicity is so important in such a juicer, I don't think this component has sufficient reason to exist. It appears that its role in providing a hand rest would be better played by the outer edge of the machine. This would need to be moved closer to the upper edge of the rotating strainer - but the existing space there is largely wasted. Any role it might play in protecting the fingers from the rotating elements - or the pulp on them - seems unnecessary.

    I feel that the outer lip's role of catching juice when centrifuging should be played by the juice tray. Gravity - and the strainer's upper lip - seem to stop pulp flying out of the machine when centrifuging well enough.

    Pressing pulp down onto the mesh might be a sensible idea - but apparently the current cover is only effective at doing that when the tray is very full of pulp. Juicing three large oranges doesn't produce enough pulp for this action to actually happen. You can see it rarely performs a useful function in this role since - after use - there are few or no marks from juice on the undersides of the plastic lips. Maybe multiple grapefruit would

    In summary, I feel that currently the cover hardly performs any useful function.

    As well as having to be disassembled, washed and reassembled I found the cover got in the way during juicing - digging into the base of my hand in an uncomfortable fashion as I applied downward pressure to the fruit.

    The cover does play an aesthetic role - it hides the machine's innards during operation - but generally, the approach I would prefer on this front is to make the machine's innards more beautiful - rather than adding additional components.

    Unfortunately, several factors mean that currently the cover can't easily be left off. Without it the base of the hand tends to rest on the rotating strainer. The outer edge of the machine is higher - but currently too distant to be much use - and is uncomfortably thin. The machine's lid fits poorly when the cover is absent.

    Citrus press - lid
    The lid
  • The lid

    The lid acts as a dust cover. Like the reamer and sieve this is made from translucent plastic. The result would not look out of place next to an iMac.

    Some presses allow you to use the lid - or other component - to apply force to the fruit with. This is not such a machine.

    I think this sort of citrus press needs something to press fruit down onto the reamer with.

    I use a small wooden finger bowl when squeezing grapefruit - and a plastic hemisphere when juicing oranges. I find these really help. As well as offering the ability to apply force in more directions easily, they lift my hand up a bit - and stop me bearing down directly onto the machine.

    The plastic hemisphere is the best of my two pressers. It allows the fruit to rotate slowly within it during operation - facilitating extracting juice evenly from all sides of the fruit.

Disassembly, cleaning and reassembly

The machine is pretty easy to clean.

The strainer cn be cleaned pretty effectively even by rinsing - and a very quick scrub cleans the reamer as well.

Reassembly is seems slightly easier than disassembly.

Like most juicers, the machine rewards rapid cleaning. Time is wasted if pulp is left to dry on.

Having said this, there are more components that need disassembling, cleaning and reassembling than most other citrus presses.

Additional comments

Is the centrifuge useful? It doesn't produce much in the way of additional juice. Frankly, it hardly seems worth pressing the "centrifuge" button most of the time.

My last citrus press ran its motor in opposite directions alternately - which helped in disturbing the flesh of the fruit while extracting juice. However this seems to be a feature that conflicts with having a handed screw thread on the reamer. Both seem likely to offer rather marginal benefits. If I was forced to choose I'd probably go for a screw thread.

Future directions

I'd like to see some developments tried in future citrus presses:

  • Lifting the reamer up on a stalk. This removes the possibility for resting the side of the hand on anything, frees space in the base for extra holes - and makes it easier to turn the reamer into a modular component. I think the reamer could profitably be lifted up at least until the bottom of an orange placed on it is level with the top of the strainer.

    Current shape

    Proposed shape

    Obviosuly the stalk would need to be of sufficient width for neither it's attachment to the strainer or its length to represent any sort of structural weakness.

  • Using close packed holes in the strainer. There seems to be a tradition of using radial slits in citrus juicers. I'm sceptical about the merits of this design - and think close packed holes would probably work better overall.

  • Built in lever and cone for forcing oranges onto the reamer. It's sometimes good to use your fingers - but sometimes it is too much effort. I think the option of using a mechanical lever and cone would be a desirable one.


I think this machine produces juice of a slightly inferior quality to my twin gear juicer. It is not as efficient at extracting juice as the twin gear model either.

However the fact that it is much easier and quicker to operate means that it is often what tends to get used here when juicing citrus fruit.

While there are some elements I'm not entirely happy with, this is definitely the best citrus press I've encountered.



The Siemens citrus press


Tim Tyler | |