Bosch MMB21 GB Series, Instruction Manual

Robert Bosch Hausgeräte GmbH

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,

Safety systems 

Start lock-out

The appliance cannot be switched on until 

the blender jug has been turned firmly into 

place.

Automatic disconnection

The appliance switches off automatically 

if the blender jug accidentally becomes 

detached during operation.

See “Troubleshooting”.

Overview

These operating instructions refer to various 

models. An overview of the different models 

can be found on the illustrated pages 

(Fig.



).

Please fold out the illustrated pages.

1 Motor block

2 Rotary switch

0/off  = Stopp

1

= Lowest operating speed

2

= Highest operating speed

Pulse = pulse circuit at maximum speed, 

hold down switch for required 

duration

3 Cord store

4 Drive

Plastic blender jug (MMB21...)

5 Blender jug with blade

Do not process deep-frozen ingredients 

(except ice cubes).

6 Lid with feed tube

7 Measuring cup with scale (max. 50 ml)

Glass blender jug (MMB42...)

8 Blade holder with blender blade and seal

9 Blender jug made of borosilicate glass

Especially heat-resistant, even very 

hot ingredients can be processed.

10 Lid with feed tube

11 Measuring cup with scale (max. 50 ml)

12 Smoothie insert *

For the preparation of fruits and other 

ingredients into juices and smoothies. 

The insert ensures that pips and other 

solid ingredients are filtered out and 

do not get into the drinks.

*

Not all models.

Operation

The blender is suitable for

– blending and frothing liquids,

– cutting and chopping raw fruit, vegetables, 

nuts and chocolate,

– puréeing soups, cooked fruit and 

vegetables,

– preparing mayonnaise and sauces.

The appliance is suitable for preparing 

the following quantities:

Warning!

Never operate an empty blender. 

Always work with a completely assembled 

appliance. Screw the blender jug fully onto 

the motor block.

Recommended operating speed

Hot or frothing liquids  ...................................  1

making mayonnaise .....................................  2

Soups, Smoothies ........................................  2

Cocktails, Milkshakes ...................................  2

Ice cubes ...............................................  Pulse

Very hard ingredients ............................  Pulse

Solid food

100 g

Liquids

max. 1.5 l

,

Hot or frothing liquids

max. 0.5 l

Risk of injury from sharp blades/

rotating drive!

Never place fingers in the attached 

blender jug. Never operate the appliance 

without a completely assembled blender 

or attached lid! Do not remove or attach 

blender jug until the appliance has been 

switched off and the drive has come to 

a standstill. When the appliance has been 

switched off, the blade continues running 

briefly.

Risk of scalding!

If processing hot liquids, steam escapes 

through the funnel in the lid. 

Pour maximum 0.5 litres of hot or frothing 

liquid into the blender jug.

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Robert Bosch Hausgeräte GmbH 

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Always disconnect the appliance from the supply if it is left unattended 

and before assembling, disassembling or cleaning.

Do not place the power cord over sharp edges or hot surfaces. 

To prevent injury, a damaged power cord must be replaced by the 

manufacturer or his customer service or a similarly qualified person. 

Only our customer service may repair the appliance.

,

Safety instructions for this appliance

Risk of injury 

Risk of electric shock

Never immerse the motor block in water and never hold under running 

water and do not clean in the dishwasher.

If there is a power cut, the appliance remains switched on and will start 

up again when the power is restored.

Recommendation: Never switch on the appliance for longer as you 

need to processing the ingredients.

Risk of injury from sharp blades/rotating drive!

Never place fingers in the attached blender jug.

Never operate the appliance without a completely assembled blender 

or attached lid! Do not remove or attach blender jug until the appliance 

has been switched off and the drive has come to a standstill.

When the appliance has been switched off, the blade continues 

running briefly.

Risk of scalding!

Caution when processing hot liquids.

If processing hot liquids, steam escapes through the funnel in the lid.

While working, always hold the lid firmly with one hand. 

However, do not place hand over the refill opening!

Pour maximum 0.5 litres of hot or frothing liquid into the blender jug.

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