Retsch BB 51 User manual

Jaw Crusher Type BB 51
Operating Instructions
©Retsch GmbH, 42781 Haan, Rheinische Str.36, Germany, Doc. No. GB 98.056.9999

17.12.1998 ©Retsch GmbH 2 Doc. No. GB 98.056.9999
Notes on the operating instructions
These operating instructions for the jaw crusher type BB 51 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 51. Knowledge of the relevant chap-
ters by the appropriate target group(s) is essential for safe and proper
handling.
This technical documentation comprises a reference work and a train-
ing guide. The individual chapters are self-contained units.
These operating instructions do not contain any instructions on re-
pairs. Should any repairs become necessary, please contact your sup-
plier or Retsch GmbH.

17.12.1998 ©Retsch GmbH 3 Doc. No. GB 98.056.9999
Notes on the operating instructions ...................2
Safety ........................................4
Notes on safety ................................4
Warning notes.................................5
Repairs .....................................5
Confirmation .................................5
Technical data ..................................6
Use for the intended purpose .......................6
Description of function...........................6
Protective devices ..............................7
Gap width adjustment ...........................7
Throughput, output fineness .......................7
Rated capacity of withdrawable receptacle ...............7
Noise data : ..................................7
IP ratings....................................7
Rated power ..................................7
Dimensions ..................................7
Required mounting surface ........................7
Transport and installation ..........................8
Packaging ...................................8
Transport ...................................8
Interim storage ................................8
Supply schedule................................8
Parameters for the installation location .................9
Installation ...................................9
Electrical connection ............................9
Operation .....................................10
Controls and operation ...........................10
Schematic drawing of the controls: ...............10
Overview of control elements ..................11
Operation of the BB 51 ............................12
Switching ON and OFF ..........................12
Set gap width to 00.0 ............................12
Starting the crushing process .......................13
Feeding in the input material .......................13
Interrupting the crushing process ....................14
Continuing the crushing process .....................14
Emptying the drawer ............................14
Notes on working procedures .......................15
General .....................................15
Input grain size ................................15
Quality of process material.........................15
Transport handles ..............................16
Cleaning ....................................16
Cleaning the drawer recess ....................16
Cleaning the crushing chamber .................17
Cleaning the interior of the casing ...............17
Maintenance ..................................17
Replacing jaws ................................18
Accessories ..................................19
Copyright ...................................19
Modifications .................................19
Safety regulations (table) ..........................20
Warranty conditions ..............................21

Safety
Target group: All persons dealing with the machine in any way
The BB 51 is a modern, powerful product from Retsch GmbH. It re-
flects 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 ap-
pointed to work with the BB 51:
• 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 51 either by oral in-
struction 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 51.
For your own protection, have your staff confirm that they have been
instructed in operation of the BB 51. 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
17.12.1998 ©Retsch GmbH 4 Doc. No. GB 98.056.9999

Warning notes
We use the following symbols to warn against:
!
Personal injury
Damage to property
Repairs
These operating instructions do not contain any instructions on re-
pairs. 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
17.12.1998 ©Retsch GmbH 5 Doc. No. GB 98.056.9999

Technical data
Target group: Operators
Machine type designation: BB 51
Use for the intended purpose
The BB 51 is suitable for crushing of medium to extremely hard sub-
stances and brittle and hard/tough materials. The achievable final out-
put fineness can be up to 0.5 mm and less, depending on the input ma-
terial.
The maximum input grain size is 35 mm.
The materials which can be crushed in the BB 51 include the follow-
ing:
Bakelite // bauxite // concrete // dolomite // ores // feldspar //
granite // graywacke // glass // limestone // gravel // coal // coke
// corundum // quartz // salts // refractory clay // slag // silicates
// silicon // sintered materials // cement clinker, etc.
This machine is not designed as a production machine but as a labora-
tory machine intended for 8 hour single shifts with 30% total opera-
tion time.
Should you require any further details, the Retsch applications labora-
tory 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 ren-
dered null and void.
Description of function
Comminution in the BB 51 is effected by means of pressure.
The crusher chamber 1is funnel shaped and tapers down towards
the output end in accordance with the gap width which is infinitely
adjustable in steps of 0.1 mm.
The BB 51 has a gap width adjustment mechanism 5linked to a fixed
crusher arm 4and a moving crusher arm 3. Both crusher arms are
fitted with replaceable jaws 2between which comminution takes
place by means of pressure.
The eccentric motion ( eccentricity=2.4mm / 960min-1 at 50Hz and
1028min-1 at 60Hz ) of the moving crusher arm 3steadily moves the
input material until it is fine enough to pass through the set gap
width and fall into a withdrawable receptacle 6.
The convex form of the replaceable jaws 2, which may be made of
various different materials accelerates the process of comminution
while preventing compaction and formation of bridges.
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17.12.1998 ©Retsch GmbH 7 Doc. No. GB 98.056.9999
Protective devices
The crusher chamber of the BB 51 is enclosed on all sides by a robust
steel plate casing.
The BB 51 can be safely started up even when the hopper lid is open
and the output receptacle withdrawn, as its design in compliance with
EN 294 precludes any inadvertent insertion of hands or objects.
A main switch fitted with a thermal overload relay on the back of the
machine protects against current overload.
Gap width adjustment
From 0 to approx. 10 mm by handwheel in 0.1 mm steps. Digital gap
width indicator.
Throughput, output fineness
The performance data, throughput and achievable final output fineness
are dependent on the breakage behaviour and hardness of the process
material and on the gap width set. They can only be determined em-
pirically.
Rated capacity of withdrawable receptacle
Approx. 1000 ml
Noise data :
Noise measurement to DIN 45635-031-01-KL3
The noise levels are also influenced by the properties of the input ma-
terial.
Example 1:
Sound power level LWA = 78,3 dB(A)
Workplace related emission level LpAeq = 68,7 dB(A)
Service conditions :
Input material: none
Crushing members : zirconia jaws
Gap width set: 2mm
Example 2:
Sound power level LWA = 91,7 dB(A)
Workplace related emission level LpAeq = 83,7 dB(A)
Service conditions :
Input material : quartz gravel of grain size approx. 25mm
Crushing members : zirconia jaws
Gap width set: : 2mm
Output grain size: < 5 mm
IP ratings
IP20
IP00 on the side ventilation slits
Rated power
1100 W
Dimensions
Height: approx. 510mm, Width: approx. 360 mm, Depth: approx. 580 mm
Weight: approx. 79 kg / net
Required mounting surface
(462 mm x 1000 mm; no safety clearances necessary!)

Transport and installation
Target group: Operators
Packaging
The packaging is suitable for the mode of transport selected. It com-
plies with the general packaging regulations.
Please keep the packaging for the duration of the guarantee pe-
riod, as your guarantee claim will be endangered in the case of a
complaint or return of the machine in inadequate packaging.
Transport
Fig.1
The handles M available as accessories (Order No. 32.825.0001)
can be used to lift and carry the BB 51. Fig.1
The BB 51 must not be thrown, subjected to impact or shock
during transport. The electrical and mechanical components may
otherwise be damaged
Temperature fluctuations
When there are severe temperature fluctuations (e.g. during air
transport) the BB 51 is to be protected from condensation. The
electrical components may otherwise be damaged.
Interim storage
Also ensure that the BB 51 is stored in a dry location for interim peri-
ods.
Supply schedule
• BB 51 with built-in crusher arms and wearing plates.
• 1 mains power cable.
• 1 instruction manual.
Check the delivery for completeness, including the accessories ordered
individually.
Check the perfect function of the BB 51 (see chapter on operation).
On incomplete delivery and / or transport damage, you must no-
tify the forwarding agent and Retsch GmbH immediately (within
24hrs). It may not be possible to take account of later com-
plaints.
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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 dam-
aged 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
Place the BB 51 jaw crusher on an even and stable surface, eg. a labo-
ratory bench.
Electrical connection
• Consult the type plate for the voltage and frequency of the BB
51.
• Ensure that the values are in agreement with the mains power
supply.
• Connect the BB 51 to the mains using the cable supplied.
Failure to observe the values on the type plate can result in dam-
age to electronic or mechanical components.
17.12.1998 ©Retsch GmbH 9 Doc. No. GB 98.056.9999

Operation
Target group: Operators
Controls and operation
Schematic drawing of the controls:
Front view
ACHTUNG!
PRIOR TO ANY OPENING OF THE HOUSING
DISCONNECT UNIT FROM MAINS!
RETIRER LA PRISE AVANT
L'OUVERTURE DU BOITIER!
VOR ÖFFNEN DES GEHÄUSES
NETZSTECKER ZIEHEN!
Rear view
17.12.1998 ©Retsch GmbH 10 Doc. No. GB 98.056.9999