Retsch HM 200 User manual

© Retsch GmbH, 42781 Haan, Retsch-Allee 1-5, Germany | 06.07.2022 Version 0000
Manual
Hammer Mill HM 200
Translation

2
Copyright
© Copyright by
Retsch GmbH
Retsch-Allee 1-5
42781 Haan
Germany

3
Table of Contents
1Notes on the manual............................................................................................................................. 6
1.1 Disclaimer.......................................................................................................................................... 6
1.2 Copyright............................................................................................................................................ 6
1.3 Explanation of signs and symbols ..................................................................................................... 7
1.4 Explanations of the Safety Instructions ............................................................................................. 7
2Safety...................................................................................................................................................... 9
2.1 Use of the Device for the Intended Purpose...................................................................................... 9
2.2 Improper use...................................................................................................................................... 9
2.3 Obligations of the operating company............................................................................................. 10
2.3.1 Provisions .................................................................................................................................... 10
2.3.2 Personnel..................................................................................................................................... 10
2.3.3 Workstation and device ............................................................................................................... 10
2.3.4 Qualification of personnel ............................................................................................................ 10
2.3.5 Personal protective equipment (PPE) ......................................................................................... 11
2.4 Structural modifications and repairs ................................................................................................ 11
2.5 Safety equipment............................................................................................................................. 11
2.6 Emergencies.................................................................................................................................... 12
2.6.1 Switching the device off in an emergency ................................................................................... 12
2.6.2 Putting the device back into service following a fault or unexpected interruption ....................... 12
2.7 Preventing risks during normal operation....................................................................................... 12
2.8 Avoiding damage to property........................................................................................................... 13
2.9 Confirmation Form for the Managing Operator................................................................................ 14
3The Hammer Mill HM 200.................................................................................................................... 15
3.1 Technical data ................................................................................................................................. 16
3.2 Emissions......................................................................................................................................... 17
3.3 Views of the device.......................................................................................................................... 17
3.3.1 Front............................................................................................................................................. 18
3.3.2 A view on the grinding chamber .................................................................................................. 19
3.3.3 Back............................................................................................................................................. 20
3.4 Instructions on the device................................................................................................................ 21
3.5 Installation drawing.......................................................................................................................... 23
3.6 Type Plate Description..................................................................................................................... 25
4Packaging, Transport and Installation .............................................................................................. 26
4.1 Accessories included with delivery.................................................................................................. 26
4.2 Packaging........................................................................................................................................ 26
4.3 Transport.......................................................................................................................................... 26
4.4 Temperature Fluctuations and Condensation ................................................................................. 27
4.5 Conditions for the Installation Site................................................................................................... 27
4.6 Removing the Transportation Lock.................................................................................................. 28
4.7 Installation of the Device.................................................................................................................. 29
5First Commissioning........................................................................................................................... 31
5.1 Electrical Connection....................................................................................................................... 31
5.2 Establishing the electrical connection.............................................................................................. 32
5.3 Lubricating the device when putting it into service for the first time................................................ 33
6Operating the device........................................................................................................................... 34
6.1 Switching the device on/off.............................................................................................................. 36
6.2 Replacing the feed hopper............................................................................................................... 37
6.3 Replacing the collecting receptacle................................................................................................. 38
6.4 Preparing the grinding process........................................................................................................ 39
6.5 Starting the grinding process........................................................................................................... 40
6.6 Stopping the grinding process......................................................................................................... 43
6.7 Removing the sample material........................................................................................................ 43

4
7Maintenance......................................................................................................................................... 45
7.1 Cleaning........................................................................................................................................... 45
7.1.1 Cleaning the outside of the device .............................................................................................. 46
7.1.2 Cleaning of grinding chamber and grinding gear......................................................................... 46
7.2 Servicing.......................................................................................................................................... 48
7.2.1 Maintenance of pneumatic spring................................................................................................ 48
7.2.2 Lubricating the device.................................................................................................................. 49
7.2.3 Checking the limit switch ............................................................................................................. 49
7.3 Wear ................................................................................................................................................ 50
7.3.1 Wear and tear of wearing plates and baffle plates...................................................................... 50
7.3.2 Rotor wear ................................................................................................................................... 51
7.4 Returning for repair and maintenance............................................................................................. 53
8Accessories ......................................................................................................................................... 54
9Disposal................................................................................................................................................ 55
10 Index ..................................................................................................................................................... 56

Notes on the manual
5

Notes on the manual
6
1 Notes on the manual
This manual provides technical guidelines for the safe operation of the device. Read this
manual through carefully before installing, putting into service and operating the device.
Reading and understanding this manual is essential for handling the device safely and as
intended.
This manual does not contain any repair instructions. Please contact your supplier or contact
Retsch GmbH directly if anything is unclear or you have questions about these guidelines or the
device, or in the case of any faults or necessary repairs.
You can find further information about your device at https://www.retsch.com on the pages for
the specific device concerned.
Amendment status:
The document amendment 0000 of the "Hammer Mill HM 200" manual has been prepared in
accordance with the Directive of Machinery 2006/42/EC.
1.1 Disclaimer
Diev orliegende Bedi enungsanleitung w urdemi t größter Sorgf alt erstellt.T echnische Än derungen sind vorbeh alten. Für Personensch äden, die aus der Nichtb efolgung der Sicherh eits- und Warnhinweis ei n dieser Bedienungs anleitung resultier en,wi rd keine Haftung über nommen. Für Sac hschäden, die aus der Nich tbefolgung der Hi nweisei n dieser Bedienungs anleitung resultiere n,w irdk eine Haftung übern ommen.
This manual has been prepared with great care. We reserve the right to make technical
changes. We assume no liability for personal injuries resulting from the failure to follow the
safety information and warnings in this manual. No liability will be assumed for damage to
property resulting from the failure to follow the information in this manual.
1.2 Copyright
This document or parts of it or its content may not be reproduced, distributed, edited or copied
in any form without prior written permission of Retsch GmbH. Damage claims shall be asserted
in the case of infringements.

Notes on the manual
7
1.3 Explanation of signs and symbols
In this manual, the following signs and symbols are used:
Signs and symbols
Meaning

Reference to recommendation and/or important information.
Bold font
Labelling of an important term.
•.
•.
•
Lists
(1), (2), (…)
(A), (B), (..)
The components have a fixed marking.

Action steps of instructions.
➔
Result of an action step
Retsch’s Hammer Mill HM 200 is primarily referred to as a device within the
individual sections of these operating instructions.
1.4 Explanations of the Safety Instructions
The following warnings in this manual warn of possible risks and damage:
DANGER
D1.0000
Risk of fatal injuries
Source of danger
−Possible consequences if the danger is ignored.
•Instructions and information on how to avoid the risk.
Fatal or serious injuries may result if the “Danger” sign is disregarded. There is a very high
risk of a life-threatening accident or lasting personal injury. The signal word DANGER is
additionally used in the running text or in instructions.
WARNING
W1.0000
Risk of life-threatening or serious injuries
Source of danger
−Possible consequences if the danger is ignored.
•Instructions and information on how to avoid the risk.
Life-threatening or serious injuries may result if the “Warning” sign is disregarded. There is
an increased risk of a serious accident or of a possibly fatal personal injury. The signal word
WARNING is additionally used in the running text or in instructions.

Notes on the manual
8
CAUTION
C1.0000
Risk of injuries
Source of danger
−Possible consequences if the danger is ignored.
•Instructions and information on how to avoid the risk.
Average to slight injuries may result if the “Caution” sign is disregarded. There is an average
or slight risk of an accident or personal injury. The signal word CAUTION is additionally
used in the running text or in instructions.
NOTICE
N1.0000
Type of damage to property
Source of the damage to property
−Possible consequences if the information is ignored.
•Instructions and information on how to avoid the damage to
property.
Damage to property may result if the information is disregarded. The signal word NOTICE is
additionally used in the running text or in instructions.

Safety
9
2 Safety
CAUTION
C2.0002
Risk of injury
Lack of knowledge of the manual
−The manual contains all safety-related information. Disregarding the
manual can therefore lead to injuries.
•Read the manual carefully before operating the device.
Target group:
The HM 200 has been designed for preparing samples in a laboratory environment. laboratory
environment. This manual is therefore directed at persons who work with this device in a
comparable environment and who already have experience with similar equipment.
The HM 200 is a modern, efficient, state-of-the-art product from Retsch GmbH. Its reliability is
ensured when used as intended and with knowledge of this technical documentation.
2.1 Use of the Device for the Intended Purpose
The device HM 200 is intended for grinding medium-hard, hard, short-fibered and brittle
samplematerial in dry and slightly moist condition up to a particle size of 100 mm. With its large
grinding chamber, the device is designed for fast, loss-free, powerful grinding of ground material
with large volumes or in large quantities and provides reproducible results.
As a laboratory instrument, the unit is intended exclusively for sample preparation and
processing of solids and is not to be used as a production machine.
The instrument is designed for stationary operation in a dry and clean working environment.
The operator and operating personnel must have read the operating manual and be familiar
with the full range of functions of the instrument.
2.2 Improper use
The HM 200 may only be used as intended. Any purposes used other than those described
under the intended use are considered to be contrary.
The device is not suitable for processing any sample materials which are able to form explosive
air mixtures.
The device is not suitable for wet grinding.
Claims for damages of any kind are excluded for material damage and personal injury resulting
from improper use and/or failure to follow the safety instructions.

Safety
10
2.3 Obligations of the operating company
2.3.1 Provisions
The operator is responsible for ensuring that persons working with the device have taken note
of and understood all relevant safety regulations.
2.3.2 Personnel
•Ensure that only skilled personnel are deployed who, due to their training and experience,
are qualified to recognise risks and avoid potential hazards.
•Personnel should be instructed regularly on handling the device, in particular about the
occurrence of sudden events.
•Trainee personnel should only be allowed to work on the device when supervised by
qualified skilled personnel.
•Check the safety awareness of staff regularly.
•Define responsibilities of personnel according to qualifications and job description.
•Provide personnel with personal protective equipment (PPE).
•Ensure that the following prerequisites have been met:
•Personnel have read and understood this Manual, and in particular the chapter on
"Safety".
•Personnel know and follow the pertinent accident prevention and safety regulations.
•Personnel wear the designated personal protective equipment (PPE) when working with
the device.
2.3.3 Workstation and device
•Ensure that there is sufficient lighting and ventilation at the workstation.
•Ensure that the exhaust air is properly conducted outside.
•All signs on the device must be kept in a legible condition.
•Ensure that all inspections and servicing work prescribed in this Manual are carried out.
2.3.4 Qualification of personnel
Work/operating phase
Qualification
Transport
Installation
Commissioning
Operation
Controlling
Servicing
Disposal
Qualified employee who has been trained in
the safe use of the device.
Work on the electrical equipment on the
device
Electrician who, on the basis of his/her
training, knowledge and experience is able
to evaluate the work assigned and
recognise potential hazards.

Safety
11
2.3.5 Personal protective equipment (PPE)
Recommendations for personal protective equipment (PPE)
Work/Operational phase
Personal Protective Equipment (PPE)
Transport
Detailed listing
Safety shoes
Commissioning
Maintenance
Safety shoes
Disposal
Safety shoes
Normal operation (Operation and Control)
Safety shoes
Hearing protection
Safety goggles
Possibly protective gloves for the removal
of sample material at extreme
temperatures.
2.4 Structural modifications and repairs
This Manual does not contain any repair instructions. For safety reasons, repairs may only be
carried out by Retsch GmbH, an authorised representative or by qualified service technicians.
Please notify the following in the event of a repair:
•The representative of Retsch GmbH in your country;
•Your supplier; or
•Retsch GmbH directly.
Service address:
2.5 Safety equipment
Safety circuit door interlock
The device is equipped with a safety circuit which allows the device to be switched on only
when the door is properly closed. Opening and closing the device door is only possible when
the device is switched off.
Emergency stop switch
The device is equipped with an emergency stop switch installed by the manufacturer. This
switch is also used for switching the device on and off in normal operation.

Safety
12
2.6 Emergencies
The device can be switched off at any time by using the emergency stop switch on the front of
the device.
2.6.1 Switching the device off in an emergency
In the event of a malfunction or unexpected interruption of operation, please perform the
following steps:
Use the emergency stop switch on the front of the device to prevent the device from being
switched on again.
Pull the mains plug out of the socket to disconnect the device from the mains.
Eliminate the fault.
2.6.2 Putting the device back into service following a fault or unexpected interruption
➔The fault has been eliminated.
Insert the mains plug into the socket to reconnect the device to the mains
Remove the fuse of the emergency stop switch before switching it on again.
2.7 Preventing risks during normal operation
Failure to observe the following safety instructions is contrary to the intended use and
represents a danger to personnel and a risk to operational safety.
Transport and installation
•Use a forklift to move the device during transport and installation.
•Wear safety shoes during transport and installation.
•It is only permitted to connect the device to sockets which are equipped with a protective
earth conductor (PE).
•When connecting the device, the values specified on the type plate must match with the
values of the power connection.
Operation
•Read the operating instructions carefully before operating the device.
•Operate the device only at a sufficiently large workplace with a safe stand of the device.
•Check the power cord for any damage before operation.
•Never operate the device if there is any damage visible or suspected.
•Operate the device only in accordance with the technical limits of use.
•During operation, do not wear any jewellery, do not let your hair down and do not wear a tie
or similar loose clothing.
•While the device is in operation, it is required to wear protective goggles and hearing
protection.
•Before operating the device, it is required to take the necessary measures, as only limited
communication is possible while the device is in operation.
•Do not operate the device in explosive atmospheres.
•Observe safety data sheets of the samples and follow the instructions by taking appropriate
measures in advance.

Safety
13
•Do not grind explosive and/or flammable substances.
•Do not grind substances that may become explosive and/or flammable during the grinding
process.
•During the operation process, components carrying samples can become very hot.
Therefore, wait for the sample to cool down before taking it and wear protective gloves, if
necessary.
•Observe the surroundings during grinding, as it is difficult to perceive acoustic signals due to
the background noise.
Maintenance and repair
•Prior to the performance of any maintenance or repair work, switch off the devicewith the
emergency stop switch.
•Before any maintenance work is performed, secure the device against being switched on
again and disconnect it from the power supply.
•Do not clean the device with running water.
•Any repairs may only be carried out by the manufacturer of the device or an authorised
representative.
2.8 Avoiding damage to property
•Protect the device against condensation in case of any expected strong temperature
fluctuations (e.g. during airplane transport).
•Do not knock, shake or throw the device during the transport to the place of installation.
•Observe the conditions of the installation site when setting up the device.
•When inserting the sieve, please ensure that it is correctly seated.
•Do not feed the sample material to be grinded until the grinding mechanism has started up.
•Do not feed the material too quickly.
•When using the collecting vessel, do not overfill it to prevent a backflow into the grinding
chamber.
•Use a damp cloth for cleaning.
•Do not use solvents or aggressive cleaning agents for cleaning.
•Only use original spare parts for maintenance.

Safety
14
2.9 Confirmation Form for the Managing Operator
This manual contains essential instructions for operating and maintaining the device which must
be strictly observed. It is essential that they be read by the user and by the qualified staff
responsible for the device before the device is commissioned. This 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 he has received
sufficient instructions about the operation and maintenance of the system. The user has
received the 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.
The managing operator should for legal protection have the user confirm the instruction about
the operation of the device.
I have read and taken note of the contents of all chapters in this manual as well as all
safety instructions and warnings.
User
Surname, first name (block letters)
Position in the company
Place, date and signature
Managing operator or service technician
Surname, first name (block letters)
Position in the company
Place, date and signature

The Hammer Mill HM 200
15
3 The Hammer Mill HM 200
The Hammer Mill HM 200 of company Retsch is a laboratory instrument and is used for sample
preparation. The device enables the grinding of medium-hard, hard, short-fibred and brittle
sample material in dry and slightly moist condition up to a particle size of 100 mm.
The final fineness level of the material to be grinded is essentially determined by the following:
•Sieve
•Condition (breakage behaviour) of the material to be grinded.
Due to its large grinding chamber, the device is able to grind large volumes or large
quantities of sample material in a fast, loss-free and powerful manner and to provide
reproducible results. In addition, the device is also suitable for deagglomeration. Among
others, the following types of material can be grinded as sample material:
•Coal •Dry animal feed
•Clinker •Spices/herbs
•Gravel •Soil samples
•Broken glass
The device meets high demands in terms of purity, speed, fineness, reproducibility and safety.
Among others, the instrument can be used in industry and research in the following areas due
to its robust design:
●Energy supply / power plants
●Building materials sector
●Food industry
●Recycling industry
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.

The Hammer Mill HM 200
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3.1 Technical data
Application area
Applications
Grinding, deagglomeration
Application area
Agriculture, biology, chemistry, plastics, building
materials, engineering, electrical engineering, coal,
energy sector environment, food, geology,
metallurgy, glass, ceramics, medicine, pharmacy
Feed material
Hard, medium-hard, brittle, fibrous
Operating data
Power (depending on the variant)
3~, 400 V, 50 Hz, 2000 VA, 3.2 A
Protection class
IP55
Speed
3000rpm
Throughput
Approx. 1500 kg/h (depending on the hopper)
Noise emissions
Noise measurement according to DIN 45635-31-
01-KL3.
The noise characteristics are influenced by the
sample material to be grinded, the feed particle
size and the sieve used.
LpAeq = > 95 dB(A)
Electromagnetic compatibility
(EMC)
EMC class A according to DIN EN 55011:2009
Values for grinding
Maximum feed volume
30 l (large collecting vessel)
10 l (small collecting container)
Maximum grain size of the feed
quantity
100 mm
Maximum hardness of the feed
5-6 Mohs
Maximum achievable final
fineness level
< 800 µm, depending on material and sieve
Dimensions and weight
Height (incl. funnel)
Width
Depth
Depth with open grinding chamber
1570 mm
670 mm
750 mm
1400 mm
Weight
Approx. 150 kg
Hammer diameter
Hammer length
200 mm
175 mm
Required footprint
600 x 700 mm
Conditions for the installation site
Installation height
Ambient temperature
Humidity
Max. 2000 m above sea level
5 °C to 40 °C
Maximum relative humidity 80 % to 31 °C,
decreasing linearly to 50 % relative humidity at 40 °C

The Hammer Mill HM 200
17
3.2 Emissions
CAUTION
C.0020
Risk of injury caused by not hearing acoustic signals
Loud grinding noise
−Loud grinding noise may result in not hearing acoustic warning signals,
leading to injuries.
•Take the volume of grinding noise into consideration when
designing the acoustic signals in the working environment.
•Where necessary, use additional visual signals.
CAUTION
C3.0045
Hearing damage
Depending on the type of material and the sieve that is used, a high sound level
may occur.
−Excessive sound, in strength and duration, can cause impairment or
permanent damage to hearing.
•Therefore, suitable noise protection measures must be provided or
hearing protection must be worn.
Noise characteristics:
Noise measurement in accordance with DIN 45635-31-01-KL3.
The noise characteristics are mainly influenced by the properties of the material to be grinded
and the sieve used.
Example 1
Feed material
Nut shells
Feed quantity
2 kg
Under these operating conditions, the workplace-related equivalent continuous sound level is
Leq = 91.2 dB(A).
Example 2
Feed material
Circuit board remnants
Feed quantity
2 kg
Under these operating conditions, the workplace-related equivalent continuous sound level is
Leq = 99.3 dB(A).
3.3 Views of the device
The numbering of components in the following views of the device is fixed and is used
in further figures of components in the Manual.

The Hammer Mill HM 200
18
3.3.1 Front
Fig. 1: Front view
No.
Component
Function
1
Batch feed hopper
For the portion-wide feeding of sample material into the
grinding chamber.
1.1
Flap
Feeding area of the hopper for the portion-wide feeding of
material to be grinded.
2
Feed hopper for
continuous operation
For continuous feeding of material to be grinded into the
grinding chamber.
3
Door, grinding chamber
Closes the grinding chamber during the grinding process.
4
Door interlock
A handle which creates a manual lock by turning.
5
Quick release for
collecting hopper
Fastens the collecting receptacle and secures it against
slipping.
6.1
Collecting receptacle
(small)
Collects the grinded material from the grinding chamber.
Suitable for sample volumes of up to 10 litres.
6.2
Collecting receptacle
(large)
Collects the grinded material from the grinding chamber.
Suitable for sample volumes of up to 30 litres.
6.3
Outlet for continuous
operation
Feeds the grinded material continuously from the grinding
chamber into the collecting receptacle.
7
Lubrication point
Access for lubricating the rotor.
8
Emergency stop switch
Switches the device either on or off.
9
Belt cover
Protective cover for the motor belt drive.
10
Ring bolt
Load lifting device for transport.
11
Reinforcing rod
Reinforcing rod to provide additional stability in order to
enable the transport by means of a forklift.
12
Foot
In order to bolt the device to the floor.
9
7
10
1.1
3
6.1
4
6.2
8
5
2
1
12
11
6.3

The Hammer Mill HM 200
19
3.3.2 A view on the grinding chamber
Fig. 2: Front view of the grinding chamber
No.
Component
Function
13
Grinding chamber
Place for grinding the sample material in the grinding
chamber.
14
Hammer
Tool for grinding the sample material in the grinding
chamber.
15
Clamping lock
Serves to secure all components in the grinding chamber.
It is used to securely close the unit.
16
Sieve
Influences the final fineness of the sample material by size
and type of perforation.
17
Wearing plate
To protect the grinding chamber from abrasion.
18
Baffle plates
Counterpart to the grinding unit.
19
Rotor
To accommodate the hammers.
18
17
13
14
16
19
15

The Hammer Mill HM 200
20
3.3.3 Back
Fig. 3: Rear view
No.
Component
Function
20
Lubrication point
Access to the lubrication of the rotor.
21
Damper
Securing the folding mechanism to ensure that the device
does not collapse.
22
Suction connection
Enables the connection of an exhaust system or a vacuum
cleaner.
21
22
20