Retsch BB300 User manual

Operating instructions for jaw crusher type BB300
Retsch GmbH , 42781 Haan , Retsch-Allee 1-5, Germany 2/7/2012 0002

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Notes on the operating instructions
These operating instructions for the jaw crusher type BB 300 provide
all the necessary information on the topics listed in the table of
contents.
The guide the target group(s) defined for the relevant subjects in safe
and proper handling of the BB 300. Knowledge of the relevant
chapters by the appropriate target group(s) is essential for safe and
proper handling.
This technical documentation comprises a reference work and a
training guide. The individual chapters are self-contained units.
These operating instructions do not contain any instructions on repairs.
Should any repairs become necessary, please contact your supplier or
Retsch GmbH.

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Notes on the operating instructions .................................................. 2
Safety .................................................................................................. 4
Notes on safety............................................................................................... 4
Warning symbols............................................................................................ 5
Repairs ............................................................................................................. 5
Confirmation .................................................................................................. 5
Technical data.................................................................................... 6
Use for the intended purpose ...................................................................... 6
Gap adjustment.............................................................................................. 6
Throughput, final fineness............................................................................ 6
Degree of protection .................................................................................... 6
Rated power.................................................................................................... 6
Noise data ....................................................................................................... 6
Equipment dimensions ................................................................................. 7
Mounting surface required ........................................................................... 7
Dimensional chart.............................................................................. 8
Transport and installation.................................................................. 9
Packaging......................................................................................................... 9
Transport......................................................................................................... 9
Interim storage ............................................................................................... 9
Parameters for the installation location ...................................................... 10
Installation....................................................................................................... 10
Hopper assembly................................................................................. 10
Electrical Connection.................................................................................... 11
Operation ........................................................................................... 12
Graphical representation of the controls................................................... 12
Overview table for the graphic.................................................................... 13
Starting the BB 300........................................................................................ 14
Stopping the BB 300 ..................................................................................... 14
Setting the gap width..................................................................................... 14
Adjusting the zero position of the gap width indicator........................... 14
Feeding in process material .......................................................................... 15
Notes on working procedures............................................................ 16
General ............................................................................................................ 16
Input grain size............................................................................................... 16
Quality of process material .......................................................................... 16
Capacity ........................................................................................................... 16
General ............................................................................................... 17
Cleaning........................................................................................................... 17
Maintenance.................................................................................................... 17
Tests ................................................................................................................. 17
Replacing crusher jaws.................................................................................. 18
Accessories...................................................................................................... 18
Copyright......................................................................................................... 18
Modifications.................................................................................................. 18
Safety instructions (table) ............................................................................. 19
Appendix .....................................................................following pages

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Safety
Target group: All persons dealing with the machine in any way
The BB 300 is a modern, powerful product from Retsch GmbH. It
reflects the state of the art. When the machine is handled correctly by
persons familiar with this technical documentation, it is completely safe
and reliable in operation.
Notes on safety
You, as the operator, are responsible for ensuring that the persons
appointed to work with the BB 300:
have read and understood all the stipulations of the chapter
on safety,
are familiar before commencing work with all instructions and
regulations for the relevant target group,
have access to the technical documentation for this machine
at all times and without difficulty.
Ensure that new staff have been familiarised with the rules for safe and
proper handling before commencing work on BB 300 either by oral
instruction by a competent person and/or by this documentation.
Incorrect operation can lead to damage or injury. You are responsible
for your own safety and that of your staff.
Ensure that no unauthorised persons have access to the BB 300.
For your own protection, have your staff confirm that they have been
instructed in operation of the BB 300. A draft of an appropriate form
can be found at the end of the chapter on safety.
!
No liability in any form will be accepted for damage or injury
resulting from failure to observe the following notes on safety.

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Warning symbols
We use the following symbols to warn of:
!
Personal injury
Damage to property
Repairs
These operating instructions do not contain any instructions on repairs.
For your own safety, only have repairs performed by Retsch GmbH or
an authorised agent (service technicians).
In such a case, please inform:
The Retsch agency in your country
Your supplier
Retsch GmbH direct
Your service address:
_____________________________
_____________________________
_____________________________
_____________________________
Confirmation
I have read and understood the foreword and the chapter on safety.
__________________________________________________
Signature of the operator
__________________________________________________
Signature of service technician

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Technical data
Target group: Owners, operators
Machine type designation: BB 300
Use for the intended purpose
This machine is not designed as a production machine or for
continuous operation, but as a laboratory machine intended for 8 hour
single shift operation.
The BB 300 is suitable for crushing of medium to extremely hard
substances and brittle and hard/tough materials. The achievable final
fineness can be up to 5 mm and less, depending on the input material.
The maximum input grain size is <130 mm.
The materials which can be crushed in the BB 300 include the
following:
concrete // ores // rock // glass // ceramics // coal // minerals //
slags // cement clinker etc.
Should you require any further details, the Retsch applications
laboratory will be pleased to assist.
Do not modify the machine in any way, and use only spare parts and
accessories approved by Retsch.
The conformity with European Directives declared by Retsch will
otherwise be invalidated.
Furthermore, this will lead to all warranty claims being rendered
null and void.
Gap adjustment
From 1 mm to approx. 40 mm by means of a spindle.
Throughput, final fineness
The performance data, throughput and achievable final fineness are
dependent on the breakage behaviour and hardness of the process
material and on the gap width set. They can only be determined
empirically.
Degree of protection
IP55
Rated power
3000 watts
Noise data
Noise measurement to DIN 45635-31-01-KL3
The noise levels are also decisively influenced by the properties of the
material to be ground.
Example 1 :
Sound power level LWA = 95.7 dB(A)
Workplace related emission level Lp eq = 81.5 dB(A)
Service conditions :
Input material: Marble pebbles, grain size <90 mm
Gap width set: < 1 mm
Final grain size: < 14 mm
Filling of milling chamber: approx. 65%

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Example 2:
Sound power level LWA = 102 dB(A)
Workplace related emission level Lp eq = 90 dB(A)
Service conditions:
Input material: Quartz pebbles, grain size <55 mm
Gap width set: < 1 mm
Final grain size: < 10 mm
Filling of milling chamber: approx. 65%
Equipment dimensions
Height: approx. 1450 mm
Width: approx. 670 mm
Depth: approx. 1600 mm
Weight: approx. 700 kg net
Mounting surface required
670 mm x 1600 mm; no safety clearances necessary!

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Dimensional chart

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Transport and installation
Target group: Owners, carriers, operators
Packaging
The packaging is suitable for the mode of transport selected. It
complies with the general packaging regulations.
Please keep the packaging for the duration of the guarantee
period, as your guarantee claim will be endangered in the case of
a complaint or return of the machine in inadequate packaging.
Transport
The BB 300 must not be thrown, subjected to impact or shock
during transport. The electrical and mechanical components may
otherwise be damaged.
Fig.1
In order to handle the BB 300 by crane with a minimum load
capacity of 1000kp, the feed hopper has been dismantled. The
BB 300 can then be handled using appropriate lifting gear. One
option is shown in Fig. 1.
Please loop the ropes around both bearing housings on the BB
300. Fig. 1
Interim storage
Also ensure that the BB 300 is stored in a dry location for interim
periods.
Temperature fluctuations
When there are severe temperature fluctuations (e.g. during air
transport) the BB 300 is to be protected from condensation. The
electrical components may otherwise be damaged.

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Parameters for the installation location
Ambient temperature:
5°C to 40°C
If the ambient temperature falls below or exceeds the limits specified,
the electrical and mechanical components may be damaged or the
performance data changed to an unknown extent.
Humidity:
Maximum relative humidity 80% at temperatures up to 31°C,
decreasing in a straight line to 50% relative humidity at 40°C.
At higher humidity, the electrical and mechanical components may be
damaged and performance data changed to an unknown extent.
Site altitude:
max. 2000 m above sea level
Installation
Fig.2
Fig.2a
A mounting surface of 670mm in width and 1600mm in depth is
required. The mouth of the feed hopper is at a height of approx.
1450 mm.
Install the BB 300 on an even, firm surface only. Anchoring is not
absolutely necessary, as the free mass momentums induce only hardly
perceptible vibrations in the vicinity. It can however be effected using
the bores in the feet. Fig.2
Hopper assembly
In order to ensure safe transport, the BB 300 is delivered with the
feed hopper dismantled.
A cover is fitted in place of the hopper to prevent inadvertent
reaching into the machine. Fig.2a
Remove the eight hexagon screws SK with a 13 mm AF spanner.
Remove plate PL.
Fit the feed hopper.
Insert the eight hexagon screws SK and tighten them well with a
13 mm AF spanner.
!
Operation of the BB 300 without the feed hopper fitted is
impermissible.
Risk of crushing fingers and hands!

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Electrical Connection
The electrical connection must be established by a specialist
electrician.
Consult the type plate for the voltage and frequency of the BB
300.
Ensure that the values are in agreement with the mains power
supply.
Connect the BB 300 to the mains using the cable supplied.
Ensure that there is an external fuse in accordance with the local
regulations when connecting the unit to the mains supply.
Failure to observe the values on the type plate can result in damage
to electronic or mechanical components.
Prior to initial start-up, check the direction of rotation. See the
direction arrow on the motor.
If the direction of rotation is incorrect, crushing performance is
inadequate and mechanical components can be damaged.

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Operation
Target group: Operators
Controls and operation
Graphical representation of the controls
Fig.3

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Overview table for the graphic
Control
Description
Function
A
ON/OFF and motor protection switch
Starts and stops the jaw crusher motor, interrupts the
power supply when the motor is overloaded.
B
Feed hopper
Facilitates material feed, prevents inadvertent reaching
into the crusher chamber, prevents ejection of process
material.
C
Chamber for a collecting bin
A collecting bin with external dimensions:
height = 280mm//width = 450mm//depth = 650mm
can be inserted here.
A collecting bin on rollers, V= 50l, is available as an
accessory.
D
Door
Open =
collecting bin can be inserted, BB 300 cannot be started.
Closed =
BB 300 can be started, inadvertent reaching into the
machine is impossible.
E
Door catch
Prevents the door from opening of its own accord.
F
Limit switch
Stops the motor when the door is open.
G
Clamp
Fastens the crusher jaws K to the crusher arms Q and P.
H
Cheese head screw
Fastens clamp G
K
Crusher jaw
Pulverisation tool
L
Pointer
Indicates the gap width in conjunction with scale M, pitch
2.5 mm.
M
Scale
Indicates the gap width in conjunction with pointer L,
adjusts the zero position of the gap width when the jaws
are worn.
N
Lock nut
Locks the spindle O for gap width adjustment.
O
Spindle
Increases the gap width when turned anti-clockwise,
reduces the gap width when turned clockwise.
P
Wear plates
Prevent wear on the side parts.
Q
Fixed crusher arm
Accommodates crusher jaw K, facilitates adjustment of
gap width with spindle O.
R
Moving crusher arm
Accommodates crusher jaw K, performs the necessary
crushing motion.

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Starting the BB 300
The BB 300 may only be started with the crusher chamber empty.
Process material fed into the crusher chamber or feed hopper before
starting leads to blockages, and mechanical components may be
damaged.
Fig.4
The ON/OFF switch is located on the front right of the BB 300.
Fig.4
Turn the switch to the ON position.
The motor is started, and the moving crusher arm starts to move.
The crushing process can only be started when the door is closed and
locked.
When the door is opened, a limit switch prevents the BB 300 from
starting.
Stopping the BB 300
The ON/OFF and motor protection switch is located on the front
right of the BB 300. Fig.2
Turn the switch to the OFF position.
The motor is disconnected from the power supply and the moving
crusher arm stops.
Only stop the BB 300 when there is no further process material in
the crusher chamber.
Mechanical components can be damaged if there is blockage.
Setting the gap width
Fig.5
Fig.5
Start the BB 300 (under no load).
Release lock nut N(anti-clockwise).
Turning spindle Oclockwise reduces the gap.
Turning spindle O anti-clockwise increases the gap.
Pointer Lroughly shows the gap on scale M, pitch 2.5 mm.
Re-tighten lock nut N(clockwise)
Adjusting the zero position of the gap width indicator
Fig.5
Start the BB 300 (under no load).
Release lock nut N(anti-clockwise).
Carefully turn spindle Oinwards (clockwise) until the two crusher
arms just audibly meet.
Release the hexagon or knurled head screws S1 with an 8 mm AF
spanner.
Slide the “0” position on scale Mto the zero position of pointer L.
Re-tighten the hexagon or knurled head screws S1.

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Do not set the gap width of the BB 300 to below 1 mm.
Mechanical components can be damaged if there is blockage.
Feeding in process material
Fig.6
The feed hopper Bcan accept process material with grain sizes up to
130 mm. Only fill the feed hopper and the crusher chamber when the
machine is running.
The feed hopper is not however intended for storage of process
material: its function is solely that of feeding material into the crusher
chamber. It also prevents inadvertent reaching into the crusher
chamber, and stops process material from being ejected.
Fig.6
If the crusher chamber W is filled more than 2/3 (3500ml), the guide
plates on the feed hopper can be damaged and process material
conveyed by the moving crusher arm into the crusher casing behind
the crusher arm.

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Notes on working procedures
Target group: Laboratory technicians
General
The BB 300 is a robust free-standing machine which can
predominantly be used for preliminary pulverisation of hard or brittle
materials.
The performance data, throughput and achievable final fineness are
dependent on the breakage behaviour and hardness of the process
material, and on the gap width set.
Input grain size
The maximum input grain size is determined by the size of the intake
opening, and is max. 130 mm on the BB 300.
Quality of process material
In principle, any hard and brittle process material with a Mohs
hardness >3 can be crushed in the BB 300.
Moist or greasy process material with a Mohs hardness <3 tends
merely to compact or cake in the crusher chamber as a result of the
pressure applied by the crusher jaws.
Crushing is hardly possible in such cases.
Capacity
Fig.7
If the crusher chamber W is filled more than 2/3 (3500ml), the guide
plates on the feed hopper can be damaged and process material
conveyed by the moving crusher arm into the crusher casing behind
the crusher arm. Fig.7
The quantity of material in the machine also influences the proportion
of fines in the pre-pulverised sample material. The more material in
the crusher chamber, the higher the proportion of fines can be.
If the crusher chamber W is filled more than 2/3 (3500ml), the guide
plates on the feed hopper can be damaged and process material
conveyed by the moving crusher arm into the crusher casing behind
the crusher arm.

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General
Cleaning
Cleaning of the BB 300 is best effected with an industrial vacuum
cleaner and a robust, long-handled brush.
!
The feed hopper may only be dismantled by trained specialists, by
removing the eight hexagon screws, for cleaning purposes. Operation
of the BB 300 with the feed hopper removed is impermissible.
Risk of crushing fingers and hands!
!
Do not clean the BB 300 with running water.
Lethal hazard of electric shock
Solvents must not be used, as the felt seals on the sides of the crusher
arms would be destroyed, and grease packing washed out.
Maintenance
Fig.8
The BB 300 requires relubrication from time to time. Fig.8
Please consult the table below for quantities of lubricant and intervals.
The positions of the lubrication points are marked by red arrows on
the machine.
No. Quantity in kg Interval in operating hours
1 0.025 50
2 0.005 50
3 0.003 500
4 0.005 500
Points not shown in Fig.8 but marked with arrows are permanently
lubricated.
Please use the grease gun supplied with the BB 300 for lubrication.
As the lubricant, a conventional multipurpose grease can be used, e.g.
EP 4685 from ESSO/SHELL or BP.
Tests
Fig.9
The function of the limit switch on the door is to be tested every six
months. Fig.9
Start the BB 300.
Open catch E.
Open door Duntil the gap on the left is 50 mm.
Limit switch Emust operate, and the BB 300 stop.
If the limit switch does not operate, it requires resetting as described
below, or otherwise
Close door Dand catch E.
The BB 300 must not start.
Start the BB 300 at main switch A.

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Notes on setting the limit switch
Fig.10
Remove screws S1.
Remove cover A1.
Release screws S2, but do not remove them.
Move the bracket with limit switch E.
The limit switch must operate as soon as the door is opened by max. 50
mm. Fig.9
Re-tighten screws S2.
Fit cover A1 and fasten with screws S1.
Perform the test as described above under “Tests”
Replacing crusher jaws
Fig.10
Disconnect the mains plug.
Remove the feed hopper.
Set the gap width to maximum.
Remove cheese head screws S3.
Remove clamps K1.
Replace crusher jaws B1.
Should it prove difficult to remove the clamps, they can be prised off
with a screwdriver. Proceed as follows:
Remove plug ST.
Insert the screwdriver through the bore which is now free.
Tap lightly on the screwdriver with a plastic mallet.
After replacing the crusher jaws, always remember to re-tighten cheese
head screws S3 well and refit plugs ST.
Fit the feed hopper and fasten it with the eight hexagon screws.
!
The feed hopper may only be dismantled by trained specialists, by
removing the eight hexagon screws, for cleaning purposes. Operation
of the BB 300 with the feed hopper removed is impermissible.
Risk of crushing fingers and hands!
Accessories
Collecting bin on rollers, V=50 litres
Copyright
This documentation may only be duplicated or passed on to third parties,
its contents passed on or otherwise used with the express approval of
Retsch GmbH.
Violators will be liable for damages.
Modifications
We reserve the right to make technical modifications without notice.

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Safety instructions (table)
for the BB 300 taken from the chapters
Procedure
Action
Dangers
Safety
Not paying attention to the safety instructions can
lead to damage to people and property.
Claims for damage are excluded in whatever form.
Packaging
Please retain the packaging for the duration of the
guarantee period.
In the case of complaint your warrantee rights can be
endangered if the item is returned insufficiently packaged
Transport
During transportation the BB 300 should not be
knocked, shaken or thrown.
Electronic and mechanical components can become
damaged.
Temperature variations
With severe variations in temperature, the BB 300
must be protected from condensation.
Electronic components can become damaged.
Scope of delivery
In the case of the delivery being incomplete and/or
transport damage, you must inform the carrier and
Retsch GmbH immediately (within 24 h).
Later complaints can under certain circumstances no
longer be considered.
Environmental temperature
Drops below 5°C
Rises above 40°C
Electronic and mechanical components can become
damaged. Performance data change by an unknown extent.
Air humidity
Rises above 80%
at temperatures up to 31%
Electronic and mechanical components can become
damaged. Performance data change by an unknown extent.
Mounting the hopper
In order to be sure to be able to guarantee the
transport, the BB 300 has been delivered with a
dismounted filling hopper. It is not permissible to run
the BB 300 without a filling hopper mounted.
Danger of crushing for fingers and hands.
Electrical connection
Mains supply does not match the values given on the
type plate.
Before initial operation, the direction of rotation is to
be checked, see rotation direction arrow on the motor.
Electronic components can become damaged.
If the direction of rotation is wrong, no satisfactory milling
will take place and mechanical components can become
damaged.
Operation
During starting, stopping and disconnection, there
must be no material for grinding in the crushing
chamber or in the feed hopper.
Mechanical components can possibly become damaged via
a blockage.
Do not set gap width below 1 mm.
Mechanical components can possibly become damaged via
a blockage.
The crushing chamber is not be filled by more than
2/3.
Otherwise the guide plates of the feed hopper can
becoming damaged and the material for grinding will be
delivered by the breaking arm into the crusher housing
behind the arm.
Cleaning
Each time before cleaning, pull out the mains plug.
Danger of death by electrocution.
Do not clean with running water.
Danger of death by electrocution.
Solvents are not permitted.
Since they would damage the felt seals on the sides of the
breaking arms or wash out the grease filling.
The filling hopper may be swung back for cleaning, by
unscrewing the two socket screws, only by assigned,
trained personnel. Operation of the BB 300 without
screwed-in socket screws and without the filling
hopper is not permitted.
Danger of crushing for fingers and hands.