Retsch BB50 User manual

© Retsch GmbH, 42781 Haan, Retsch-Allee 1-5, Germany 07.02.2023 0004
Manual
Jaw Crusher BB50
Translation

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Copyright
© Copyright by
Retsch GmbH
Haan, Retsch-Allee 1-5
D-42781 Haan
Federal Republic of Germany

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1Notes on the Operating Manual.................................................................................................... 6
1.1 Explanations of the safety warnings.................................................................................................. 7
1.2 General safety instructions................................................................................................................ 8
1.3 Repairs............................................................................................................................................... 9
2Confirmation.............................................................................................................................. 10
3Technical data ............................................................................................................................ 11
3.1 Use of the machine for the intended purpose................................................................................ 11
3.1.1 Properties of the grinding material ............................................................................................. 11
3.2 Working instructions ....................................................................................................................... 12
3.3 Protective equipment...................................................................................................................... 13
3.4 Emissions ......................................................................................................................................... 13
3.5 Electromagnetic Compatibility (EMC) ............................................................................................. 13
3.6 Degree of protection ....................................................................................................................... 13
3.7 Motor rotation speed...................................................................................................................... 13
3.8 Receptacle volume .......................................................................................................................... 14
3.9 Feed size .......................................................................................................................................... 14
3.10 Rated power .................................................................................................................................... 14
3.11 Dimensions and weight ................................................................................................................... 14
3.12 Required floor space........................................................................................................................ 14
4Transport, scope of delivery, installation..................................................................................... 15
4.1 Packaging......................................................................................................................................... 15
4.2 Transport ......................................................................................................................................... 15
4.3 Temperature fluctuations and condensed water............................................................................ 15
4.4 Conditions for the place of installation ........................................................................................... 15
4.5 Electrical connection ....................................................................................................................... 16
4.6 Type plate description..................................................................................................................... 17
4.7 Removing Transport Safeguards ..................................................................................................... 18
4.8 Removing the transport safeguard.................................................................................................. 19
4.9 Installation of the machine.............................................................................................................. 19
5Operating the machine ............................................................................................................... 20
5.1 Views of the Instrument.................................................................................................................. 20
5.2 Overview table of the parts of the device....................................................................................... 21

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5.3 Operating elements and displays .................................................................................................... 22
5.4 Overview Table of the Operating Elements and the Display........................................................... 23
5.5 Switching On and Off....................................................................................................................... 23
5.6 Setting the gap width to zero position ............................................................................................ 23
5.7 Setting the gap width ...................................................................................................................... 24
5.8 Reverse grinding.............................................................................................................................. 25
5.9 Setting the Speed ............................................................................................................................ 26
5.10 Starting the grinding process........................................................................................................... 26
5.11 Stopping the grinding process......................................................................................................... 27
5.12 Sample receptacle ........................................................................................................................... 27
6Safety functions and fault display................................................................................................ 28
6.1 Fault messages ................................................................................................................................ 28
7Cleaning, wear and service.......................................................................................................... 29
7.1 Cleaning ........................................................................................................................................... 29
7.1.1 Removing the feed hopper.......................................................................................................... 29
7.1.2 Removing the splash-back protection......................................................................................... 30
7.1.3 Removing the grinding chamber cover ....................................................................................... 30
7.2 Service ............................................................................................................................................. 30
7.2.1 Replacing the breaking jaws........................................................................................................ 31
7.2.2 Replacing the front breaking jaw................................................................................................. 31
7.3 Wear ................................................................................................................................................ 35
7.3.1 Resetting the wear alert.............................................................................................................. 35
7.3.1.1 Setting the operating time until the calibration alert is displayed...................................... 35
8Disposal ..................................................................................................................................... 36
9Index.......................................................................................................................................... 37
Appendix ..........................................................................................................................following page

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1 Notes on the Operating Manual
This operating manual is a technical guide on how to operate the device safely and it contains
all the information required for the areas specified in the table of contents. This technical
documentation is a reference and instruction manual. The individual chapters are complete in
themselves.
Familiarity (of the respective target groups defined according to area) with the relevant chapters
is a precondition for the safe and appropriate use of the device.
This operating manual does not contain any repair instructions. If faults arise or repairs are
necessary, please contact your supplier or get in touch with Retsch GmbH directly.
Application technology information relating to samples to be processed is not included but can
be read on the Internet on the respective device’s page at www.retsch.com.
Changes
Subject to technical changes.
Copyright
Disclosure or reproduction of this documentation, use and disclosure of its contents are only
permitted with the express permission of Retsch GmbH.
Infringements will result in damage compensation liability.

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1.1 Explanations of the safety warnings
In this Operating Manual we give you the following safety warnings
Serious injury may result from failing to heed these safety warnings. We give you the following
warnings and corresponding content.
WARNING
Type of danger / personal injury
Source of danger
–Possible consequences if the dangers are not observed.
•Instructions on how the dangers are to be avoided.
We also use the following signal word box in the text or in the instructions on action to be taken:
WARNING
Moderate or mild injury may result from failing to heed these safety warnings. We give you
the following warnings and corresponding content.
CAUTION
Type of danger / personal injury
Source of danger
–Possible consequences if the dangers are not observed.
•Instructions on how the dangers are to be avoided.
We also use the following signal word box in the text or in the instructions on action to be taken:
CAUTION
In the event of possible property damage we inform you with the word “Instructions” and the
corresponding content.
NOTICE
Nature of the property damage
Source of property damage
–Possible consequences if the instructions are not observed.
•Instructions on how the dangers are to be avoided.
We also use the following signal word in the text or in the instructions on action to be taken:
NOTICE

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1.2 General safety instructions
CAUTION
Read the Operating Manual
Non-observance of these operating instructions
–The non-observance of these operating instructions can
result in personal injuries.
•Read the operating manual before using the device.
•We use the adjacent symbol to draw attention to the
necessity of knowing the contents of this operating
manual.
Target group : All persons concerned with the machine in any form
This machine is a modern, high performance product from Retsch GmbH and complies with the
state of the art. Operational safety is given if the machine is handled for the intended purpose
and attention is given to this technical documentation.
You, as the owner/managing operator of the machine, must ensure that the people
entrusted with working on the machine:
•have noted and understood all the regulations regarding safety,
•are familiar before starting work with all the operating instructions and
specifications for the target group relevant for them,
•have easy access always to the technical documentation for this machine,
•and that new personnel before starting work on the machine are familiarised
with the safe handling of the machine and its use for its intended purpose,
either by verbal instructions from a competent person and/or by means of
this technical documentation.
Improper operation can result in personal injuries and material damage. You are
responsible for your own safety and that of your employees.
Make sure that no unauthorised person has access to the machine.
CAUTION
Changes to the machine
–Changes to the machine may lead to personal injury.
•Do not make any change to the machine and use spare parts and
accessories that have been approved by Retsch exclusively.
NOTICE
Changes to the machine
–The conformity declared by Retsch with the European Directives will lose
its validity.
–You lose all warranty claims.
•Do not make any change to the machine and use spare parts and
accessories that have been approved by Retsch exclusively.

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1.3 Repairs
This operating manual does not contain any repair instructions. For your own
safety, repairs may only be carried out by Retsch GmbH or an authorized
representative or by Retsch service engineers.
In that case please inform:
The Retsch representative in your country
Your supplier
Retsch GmbH directly
Your Service Address:

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2 Confirmation
This operating manual contains essential instructions for operating and maintaining the device
which must be strictly observed. It is essential that they be read by the operator and by the
qualified staff responsible for the device before the device is commissioned. This operating
manual must be available and accessible at the place of use at all times.
The user of the device herewith confirms to the managing operator (owner)
that (s)he has received sufficient instructions about the operation and
maintenance of the system. The user has received the operating manual,
has read and taken note of its contents and consequently has all the
information required for safe operation and is sufficiently familiar with the
device.
As the owner/managing operator you should for your own protection have
your employees confirm that they have received the instructions about the
operation of the machine.
I have read and taken note of the contents of all chapters in this operating
manual as well as all safety instructions and warnings.
User
Surname, first name (block letters)
Position in the company
Signature
Service technician or operator
Surname, first name (block letters)
Position in the company
Place, date and signature

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3 Technical data
3.1 Use of the machine for the intended purpose
NOTICE This device is not designed as a production machine and for continuous operation, but
as a laboratory device, intended for single-shift intermittent periodic operation of 8 hours per
day.
Target group: Operating company, operator
Name of machine model: BB 50
The jaw crusher has been specially developed for sample preparation in the laboratory.
It is used for the fast and gentle grinding and pre-crushing of medium-hard, hard, brittle and
tough materials.
The final fineness that can be achieved can be up to 0.5 mm or below depending on the feed
material.
The maximum feed size is 40 mm.
Materials that can be ground in the BB 50 include the following:
Bakelite
Bauxite
Basalt
Concrete building
materials
Dolomite
Ores
Feld spar
Granite
Rubblestone
Glass
Limestone
Ceramic
Gravel
Boneblack
Coke
Corundum
Alloys
Oxide ceramic minerals
Quartz
Salts
Fireclay
Slag
Silicate
Silicon
Sintered material
Stones
Cement clinker
The grinding of tough samples and/or large feed sizes with zirconium oxide (ZrO2) equipment
may lead to material damage to the device. In such cases, consultation with the representative
of Retsch GmbH in your country or directly with Retsch GmbH is recommended before grinding.
3.1.1 Properties of the grinding material
In principle every hard and brittle grinding material with hardness grade >3 according to the
Mohs scale can be ground using this machine.
Damp, greasy grinding material and grinding material with a hardness grade <3 according to
Mohs tends to compact or cake in the crushing chamber under the applied pressure. Grinding
these products by fracturing and applying pressure is not possible.
Small sample quantities are ground gently and without loss. This machine is available with a
grinding chamber made from ceramic materials for heavy metal-free grinding. The digital
grinding gap display and the zero point alignment of the machine enable reproducible grinding
results.

Technical data
12
CAUTION
C1.0004
Risk of explosion or fire
Changing sample properties
−The properties and therefore also the hazardousness of the
sample can change during the grinding process.
•Do not use any substances in this device which carry the risk of
explosion or fire.
•Observe the material safety data sheets of the sample material.
3.2 Working instructions
Fig. 1: Diagram of grinding
The grinding process in this machine takes place using pressure.
The grinding chamber (T) is funnel-shaped and narrows to the outlet opening (TA) depending
on the set gap width.
The gap width setting is infinitely adjustable.
The machine has a stationary crusher arm (RB) connected to the gap width adjustment (D) and
a mobile crusher arm (SB). Replaceable breaking jaws are attached to both crusher arms,
between which the grinding takes place by means of pressure.
The eccentric movement of the actuated crusher arm (550...950/min) produces a constant
conveying of the grinding material until the final fineness has been achieved that enables it to
pass through the set gap (TA). It is then collected in a removable collecting receptacle (E).
The convex shape of the replaceable breaking jaws made from different materials ensures the
best possible fine grinding and at the same time prevents material compaction and a bridging
effect.
T
TA
D
RB
SB
E

Technical data
13
NOTICE If the crushing chamber (T) is filled with more than 2/3, then the fill hopper guide plates
could be damaged; the moving breaker arm would force product behind the breaker arm and
into the crusher housing.
3.3 Protective equipment
Fig. 2: Protective devices
The machine is equipped with the following protective devices:
A: Splash-back protection
B: Fill hopper
BS: Switch for fill hopper
ES: Switch for drawer
Prevents sample ejection
Protects against reaching inside the machine
Checks position of the fill hopper and switches the
drive off
Checks drawer position
3.4 Emissions
Noise measurement
During grinding depending on the sample material:
–approx. 86,1 dB (A) without sample (speed 950 rpm)
–approx. 88,6 dB (A) with marble break (speed 650 rpm)
3.5 Electromagnetic Compatibility (EMC)
Pos: 28.14 /0030 RET SCHX L/0000 Gerät eneutral/1012 EMV Klass e B@ 2 6\mod_151 0584780913_9.docx @ 2 25176 @ @ 1
−EMC class in accordance with DIN EN 55011: B
3.6 Degree of protection
–IP20
3.7 Motor rotation speed
The motor speed is 550...950min-1 and can be adjusted in increments of 50.
550 - 600 - 650 - 700 - 750 - 800 - 850 - 900 - 950min-1
ES
BS
A
B

Technical data
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3.8 Receptacle volume
The collection volume is < 3 l.
3.9 Feed size
The maximum feed size is 40mm.
3.10 Rated power
–200-240 V: 1150W, 2 x 8A
3.11 Dimensions and weight
When closed:
Height: 463 mm
Width: 421 mm
Depth: 607 / 562 mm
Weight: approx. 76 kg
Fig. 3: Dimensions
3.12 Required floor space
607 mm (+ space for power plug) x 421 mm
- no safety distance necessary
Space is required in front of the machine to pull the drawer out.

Transport, scope of delivery, installation
15
4 Transport, scope of delivery, installation
4.1 Packaging
The packaging has been adapted to the mode of transport. It complies with the
generally applicable packaging guidelines.
NOTICE
Storage of packaging
–In the event of a complaint or return, your warranty claims may be
endangered if the packaging is inadequate or the machine has not been
secured correctly.
•Please keep the packaging for the duration of the warranty period.
4.2 Transport
NOTICE
Transport
–Mechanical or electronic components may be damaged.
•The machine may not be knocked, shaken or thrown during
transport.
4.3 Temperature fluctuations and condensed water
NOTICE
Temperature fluctuations
The machine may be subject to strong temperature fluctuations during transport
(e.g. aircraft transport)
–The resultant condensed water may damage electronic components.
•Protect the machine from condensed water.
4.4 Conditions for the place of installation
Ambient temperature: 5°C to 40°C
NOTICE
Ambient temperature
–Electronic and mechanical components may be damaged and the
performance data alter to an unknown extent.
•Do not exceed or fall below the permitted temperature range of the
machine (5°C to 40°C / ambient temperature).

Transport, scope of delivery, installation
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Atmospheric humidity:
Maximum relative humidity 80% at temperatures up to 31°C, decreasing linearly up to 50%
relative humidity at 40°C
NOTICE
Atmospheric humidity
–Electronic and mechanical components may be damaged and the
performance data alter to an unknown extent.
•Do not exceed the admissible range for atmospheric humidity.
4.5 Electrical connection
WARNING
When connecting the power cable to the mains supply, use an external fusethat complies with
the regulations applicable to the place of installation .
•Please check the type plate for details on the necessary voltage and
frequency for the device.
•Make sure the levels agree with the existing mains power supply.
•Use the supplied connection cable to connect the device to the mains power
supply.
NOTICE
Electrical connection
–Mechanical or electronic components may be damaged.
•Please observe the information on the type plate.
NOTICE
Installation of the machine
–It must be possible to disconnet the machine from the mains at any time.
•Install the machine such that the connection for the mains cable is
easily accessible.

Transport, scope of delivery, installation
17
4.6 Type plate description
Fig. 4: Type plate
1 Device designation
2 Part number
3 Power version, Mains frequency
4 Fuse type and fuse strength
5 Capacity, Amperage
6 Year of production
7 Weight
8 Serial number
9 Bar code
10 Manufacturer’s address
11 UKCA marking
12 CE marking
13 Safety warning: Read the manual
14 Disposal label
In the case of queries please provide the device designation (1) or part number (2), as well
as the serial number (8) of the device.
1
2
3
4
5
6
7
8
11
12
14
13
9
10

Transport, scope of delivery, installation
18
4.7 Removing Transport Safeguards
Fig. 5: Carrying the machine - preparation
•Before installing the carry support, remove the hopper (B) and the grinding room cover
(P).
(see chapter Cleaning →removing the fill hopper / removing the splash-back protection)
•Before carrying the machine, remove the bolt (G), the crusher arm
(R) and the drawer (E) to make the machine lighter.
(see chapter Servicing →replacing the breaking jaws)
Fig. 6: Mounting the transport aid
•Fix the two transport aids (W) using screws (WS) to the machine.
B
R
E
P
G
WS
W

Transport, scope of delivery, installation
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4.8 Removing the transport safeguard
Fig. 7: Removing the transport lock
The machine is secured by steel plates on both sides.
•Remove the two screws (TS).
•Pull the transport lock (TB) out sideways.
4.9 Installation of the machine
Installation height: maximum 2000 m above sea level
TS
TB

Operating the machine
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5 Operating the machine
5.1 Views of the Instrument
Fig. 8: Front view
Fig. 9: Rear view
D
E
B
A
C
G
F
H,K,L
M
N
O