KNECHT USK 160 S User manual
Incl. USK 160 S floor-mounted
version
Status 11.2019 Version 2.1 | Translation
Operating Instructions
Universal Wet-Grinding Machine
USK 160 S
2
Operating Instructions
3
Universal Wet-Grinding Machine USK 160 S
Manufacturer
KNECHT Maschinenbau GmbH
Witschwender Straße 26
88368 Bergatreute
Germany
Phone +49-7527-928-0
Fax +49-7527-928-32
www.knecht.eu
Documents for the machine operator
Operating instructions
Date of issue of the operating instructions
November 14, 2019
Copyright
The copyright for these operating instructions and documents is held by KNECHT Maschinenbau GmbH.
These documents will be delivered only to our customers and to operators of our products and are a part of
the machine.
These documents may neither be reproduced, nor made accessible to third parties, including rival firms,
without our express permission.
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1. Important notes 7
1.1 Preface to the operating instructions 7
1.2 Warnings and symbols in the operating instructions 7
1.3 Warning signs and what they mean 8
1.3.1 Warning and prohibition signs on/in the grinding machine 8
1.3.2 General mandatory signs 8
1.4 Rating plate and serial number 9
1.5 Figure and item numbers in the operating instructions 9
2. Safety 10
2.1 Basic safety instructions 10
2.1.1 Observe notes in the operating instructions 10
2.1.2 Obligation on the part of the operator 10
2.1.3 Obligation on the part of the personnel 10
2.1.4 Hazards involved in handling the grinding machine 10
2.1.5 Malfunction 11
2.2 Intended use 11
2.3 Warranty and liability 11
2.4 Safety regulations 12
2.4.1 Organizational measures 12
2.4.2 Protective equipment 12
2.4.3 Informal safety measures 12
2.4.4 Selection and qualification of personnel 12
2.4.5 Machine control system 13
2.4.6 Safety measures in normal operation 13
2.4.7 Hazards due to electrical power sources 13
2.4.8 Particular hazard zones 13
2.4.9 Servicing (maintenance, repair) and fault elimination 13
2.4.10 Structural modifications to the grinding machine 14
2.4.11 Cleaning the machine 14
2.4.12 Oils and greases 14
2.4.13 Relocation of the grinding machine 14
3. Description 15
3.1 Intended use 15
3.2 Technical specifications 15
3.2.1 General 15
3.2.2 USK 160 S (tabletop version) 16
3.2.3 USK 160 S (floor-mounted version) 17
3.3 Functional description 18
3.4 Description of modules 19
3.4.1 Control panel 20
3.4.2 HV 161 belt grinding attachment (optional, all versions) 21
Table of contents
5
4. Transport 22
4.1 Transport aids 22
4.2 Transport damage 22
4.3 Transport to another installation site 22
5. Installation 23
5.1 Selection of qualified personnel 23
5.2 Installation site 23
5.3 Supply connections 23
5.4 Settings 23
5.5 Using the grinding machine for the first time 24
6. Commissioning 25
7. Operation 26
7.1 General principles of grinding technology 26
7.2 Switching on the grinding machine 27
7.3 Grinding sickle-shaped cutter knives on the wet-grinding belt 27
7.4 Grinding hand knives on the wet-grinding belt 28
7.5 Polishing and deburring with the polishing disc 29
7.6 Deburring the wet-honing wheel 30
7.7 Grinding cutlery knives on the serration grinding wheel 31
7.8 Changing the wet-grinding belt 33
7.9 Belt regulation 34
7.10 Coolant unit 35
7.10.1 Belt cooling 35
7.10.2 Closing the water nozzle for dry grinding 36
8. Care and maintenance 37
8.1 Cleaning 37
8.2 Lubrication schedule and lubricant table 37
9. Malfunctions 38
9.1 Faults 38
Table of contents
7
1.1 Preface to the operating instructions
These operating instructions are designed to make it easier for users to familiarize themselves with
the universal wet-grinding machine, also referred to in the following as “the grinding machine”
and use it for its intended purpose.
The operating instructions contain important information on how to operate the grinding ma-
chine safely, properly and cost-effectively. Observance of these instructions helps avoid hazards,
reduce repair costs and downtimes, and increase the reliability and service life of the grinding
machine.
The operating instructions must always be accessible at the place of use of the grinding machine.
The operating instructions must be read and used by all persons entrusted with working on the
grinding machine, e.g. those entrusted with:
• Transport, installation, commissioning
• Operation, including troubleshooting in the process flow, as well as
• Upkeep (maintenance, repair).
In addition to the operating instructions and the binding accident prevention regulations applica-
ble in the country and place in which the machine is used, generally acknowledged technological
rules with regard to safe and professional work practices are to be observed.
1.2 Warnings and symbols in the operating instructions
It is essential to observe the following symbols/designations used in the operating instructions.
The hazard triangle with the signal word “CAUTION” is used as a work
safety indication for all work which might result in death or physical injury.
Special care and caution must be taken when carrying out such work.
ATTENTION
”ATTENTION” is used to draw attention to particular points in order to
avoid damage and/or destruction of the grinding machine and its environ-
ment.
NOTICE ”NOTICE” refers to user tips and especially useful information.
1. Important notes
CAUTION
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1.3 Warning signs and what they mean
1.3.1 Warning and prohibition signs on / in the grinding machine
The following warning and prohibition signs have been affixed to the grinding machine:
CAUTION! DANGEROUS ELECTRICAL VOLTAGE
(warning notice on the rear panel)
When connected to the voltage supply (3x 400 V), the grinding
machine becomes electrically live and touching its live parts directly
can be life-threatening.
Live machine parts may be opened only by authorized, trained
personnel.
The grinding machine must be disconnected from the mains supply
before carrying out servicing, maintenance and repair work on it.
CAUTION! RISK OF INJURY FROM ABRASIVE PARTICLES
(mandatory sign on the front plate)
Grinding, polishing and dressing gives rise to abrasive particles
which can enter the eyes.
Wearing safety glasses is mandatory when carrying out such jobs.
1.3.2 General mandatory signs
The following general mandatory signs must be observed:
CAUTION! RISK OF INJURY FROM KNIFE
Work on the grinding machine involves grinding knives which
could cause serious cut injuries due to the sharp blades.
Wearing protective gloves is mandatory when carrying out such
jobs.
Be careful when transporting blades! Use the protective devices
provided by the knife manufacturer. Wear protective gloves and
apron.
1. Important notes
Figure 7-9 Grinding notches
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2
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1.4 Rating plate and serial number
The rating plate is located on the rear panel of the
machine.
The machine serial number can be found on the
rating plate and on the rear left side wall (see
arrow).
1.5 Figure and item numbers in the operating instructions
If the text refers to a machine component shown in a figure, a figure or item number is added in
brackets after the machine component.
Example: (7-9/1) denotes figure number 7-9, item 1.
Hold the cutlery knife (7-9/1) to the serration grinding
wheel (7-9/2) at a steep angle (approx. 45°).
Then slowly rotate towards the knife tip.
1. Important notes
Figure 1-1 Rating plate
Figure 1-2 Serial number
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2.1 Basic safety instructions
2.1.1 Observe notes in the operating instructions
The basic prerequisite for safe handling and trouble-free operation of this grinding machine is
familiarity with the basic safety instructions and regulations.
• These operating instructions contain important notes on how to operate the grinding machine
safely.
• These operating instructions, in particular the safety notes, must be read by all those who work
at the grinding machine.
• In addition, the rules and regulations regarding accident prevention at the place of use are to be
observed.
2.1.2 Obligation on the part of the operator
The operator is obliged to allow only those persons to work on the grinding machine, who
• are familiar with the occupational safety and accident prevention regulations and have been
received instruction in handling the grinding machine,
• have read and understood the operating instructions, in particular the section entitled “Safety”
and the warning notes, and have provided signed confirmation of this.
Checks are also carried out at regular intervals to ensure that the personnel are fulfilling their
obligation to observe safety at work.
2.1.3 Obligation on the part of the personnel
All personnel working on the grinding machine undertake to
• observe basic occupational safety and accident prevention regulations,
• read the operating instructions, particularly the section entitled “Safety” and the warning notes,
and provide signed confirmation of this.
2.1.4 Hazards involved in handling the grinding machine
The grinding machine has been built to the latest technological standards and the established
rules of technical safety. In spite of this, its use poses inherent risks which could result in bodily
harm or even death of the user or third parties, or impairment of the grinding machine or other
property.
The grinding machine may only be used:
• for its intended purpose,
• in faultless condition with regard to safety-related aspects.
2. Safety
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Faults that might impair safety must be eliminated immediately.
2.1.5 Malfunction
If any safety-relevant malfunction occurs in the grinding machine or if the processing response
indicates that such malfunction may have occurred, the grinding machine must be stopped imme-
diately until such time as the malfunction has been detected and eliminated.
Malfunctions may only be eliminated by authorized specialists.
2.2 Intended use
The grinding machine is meant for grinding and polishing linear and sickle-shaped flat knives only.
Other than hand knives (e.g. carving knives), all the knives must be clamped to suitable grinding
plates.
Before starting work on a flat knife, a check must first be carried out as to whether the knife fits
onto the grinding plate. Only then may the knife be clamped onto the grinding plate.
Any other use is considered improper use. KNECHT Maschinenbau GmbH assumes no liability for
damages resulting from improper use. The user alone bears the risk in such cases.
Use as intended includes the observance of all the instructions in the operating instructions.
The grinding machine is being used improperly if, for example:
• flat knives are ground without using the grinding plate.
• attachments are not properly mounted.
• knives are sharpened/polished in opposite direction of the cutting edge on the wet-grinding
belt, finned grinding wheel, wet-honing wheel, serration grinding wheel as well as the polishing
disc.
2.3 Warranty and liability
Warranty and liability claims in case of personal injuries or property damage are excluded if such
damage is attributable to one or more of the following causes:
• improper use of the grinding machine
• improper transportation, commissioning, operation and maintenance of the grinding machine
• operating the grinding machine with defective safety devices, or using improperly attached or
malfunctioning safety and protective equipment
• failure to observe the instructions with regard to transportation, commissioning, operation,
maintenance and repair of the grinding machine
2. Safety
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• unauthorized structural alterations to the grinding machine
• unauthorized modification of such aspects as drive conditions (power and speed)
• insufficient monitoring of machine parts that are exposed to wear
• use of unapproved replacement and wear parts
Use only original replacement and wear parts. If parts are purchased from external suppliers, there
is no guarantee that they are designed and manufactured to withstand the required level of stress
and provide the required level of safety.
2.4 Safety regulations
2.4.1 Organizational measures
All available safety devices must be checked regularly.
Observe prescribed intervals for recurring maintenance work or as specified in the operating
instructions.
2.4.2 Protective equipment
Before commissioning the grinding machine, care must be taken to ensure that all protective
equipment is properly mounted and functional.
Protective equipment may be removed only after the machine has stopped and has been secured
against accidental restarting of the grinding machine.
When spare parts are supplied, the protective equipment must be attached by the operator as
stipulated.
2.4.3 Informal safety measures
The operating instructions must be permanently available at the place of use of the grinding
machine. In addition to the operating instructions, the generally applicable as well as the locally
relevant accident prevention regulations must also be made available and observed.
All safety alert symbols and danger warnings on the grinding machine must be complete and
clearly legible.
2.4.4 Selection and qualification of personnel
Only trained and instructed personnel may work on the grinding machine. The minimum legal
age for employment must be observed.
2. Safety
13
The responsibilities of the personnel must be clearly assigned, i.e. commissioning, operation,
maintenance and repair, etc.
Personnel still undergoing training or instruction may only work on the grinding machine under
the permanent supervision of an experienced person!
2.4.5 Machine control system
Only trained and instructed personnel are allowed to switch on the machine.
2.4.6 Safety measures in normal operation
Refrain from any method of working which may pose a risk to safety. Only operate the grinding
machine if all the safety devices are installed and fully functional.
Check the grinding machine for external signs of damage and correct operation of the safety
devices at least once every shift.
Report any changes (including operating behavior) immediately to the department/person in
charge. Where required, shut down the grinding machine immediately and secure against restart-
ing.
Before switching on the grinding machine, ensure that no one is exposed to any risk from the
start-up of the machine.
If there are any functional faults, stop the machine immediately and secure against restarting.
Have the faults eliminated immediately.
2.4.7 Hazards due to electrical power sources
Work on electrical units or operating materials may only be performed by a qualified electrician in
accordance with electrical rules.
Defects, such as damaged cables, cable connections, etc. must immediately be rectified by an
authorized electrician.
2.4.8 Particular hazard zones
In the area of the wet-grinding belt, finned grinding wheel, serration grinding wheel, polishing
disc and wet-honing wheel, there is a risk that clothing, fingers, and hair, for example, may be
pulled in and crushed. Suitable personal protective equipment must be worn.
2.4.9 Servicing (maintenance, repair) and fault elimination
Maintenance work is to be carried out on schedule by trained personnel. Inform operating per-
sonnel before starting repair work. A responsible supervisor must be appointed.
2. Safety
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For all service work, the grinding machine is to be disconnected from the power supply and se-
cured against accidental restarting. Pull out the mains plug. Cordon off the servicing area as far as
possible.
After completion of the maintenance work and fault rectification, install all the safety devices and
check whether they are fully functional.
2.4.10 Structural modifications to the grinding machine
Modifications, retrofitting or rebuilds of the grinding machine are not allowed without the per-
mission of the manufacturer. This also applies to the installation and adjustment of safety devices.
No alterations may be carried out without the prior written approval of KNECHT Maschinenbau
GmbH.
Immediately replace machine parts which are not in perfect condition.
Only use original replacement and wear parts. If parts are purchased from external suppliers, there
is no guarantee that they are designed and manufactured to withstand the required level of stress
and provide the required level of safety.
2.4.11 Cleaning the machine
Cleaning agents and materials used must be handled properly and disposed of in an environ-
ment-friendly manner.
Ensure that wear and replacement parts are disposed of in a safe and environmentally friendly
way.
2.4.12 Oils and greases
When handling lubricants/oils and greases, follow the safety regulations for the product. Observe
special instructions for the foodstuffs sector.
2.4.13 Relocation of the grinding machine
Even when moving the machine a short distance from its site, disconnect it from all external pow-
er supply sources. Before restarting the machine, connect it properly to the current supply.
When loading or unloading, only use hoisting and load lifting equipment with sufficient
load-bearing capacity. Appoint a qualified banksman (signaler) for the lifting process.
No persons other than those entrusted with this work may be present in the loading and installa-
tion area.
Only lift the grinding machine correctly with hoisting gear in accordance with the operating
instructions (attachment points for hoisting equipment, etc.). Only use suitable transport vehicles
with sufficient load-bearing capacity. Attach the load securely. Use suitable attachment points.
When putting in operation again, proceed only as instructed in the operating instructions.
2. Safety
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3. Description
3.1 Intended use
Using the USK 160 S universal wet-grinding machine, you can grind, deburr and polish hand and
cutter knives as well as profile cutlery knives.
3.2 Technical specifications
3.2.1 General
Power supply* ������������������������������������������������������������� 3x 400 V
Mains frequency* �������������������������������������������������������������� 50 Hz
Output* ��������������������������������������������������������������������� 0.7 kW
Power consumption* ���������������������������������������������������������� 0.8 kW
Energy consumption* ������������������������������������������������������������ 2 A
Back-up fuse ������������������������������������������������������������������� 16 A
Idle noise level of the wet-grinding belt ����������������������������������������� 80 dB (A)
Diameter polishing disc ������������������������������������������������������� 150 mm
Operating noise level of the polishing disc �������������������������������������� 84 dB (A)
Diameter serration grinding wheel ���������������������������������������������� 150 mm
Operating noise level of the serration grinding wheel ����������������������������� 86 dB (A)
Speed ������������������������������������������������������������������ 1750 1/min
*) This information may change depending on the electrical power supply.
A DELTA cutter knife from KNECHT Maschinenbau GmbH was ground.
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3. Description
3.2.2 USK 160 S (tabletop version)
Height ��������������������������������������������������������������������� 450 mm
Width ���������������������������������������������������������������������� 610 mm
Depth ���������������������������������������������������������������������� 550 mm
Weight ����������������������������������������������������������������������� 29 kg
450 mm
550 mm
610 mm
Figure 3-1 Dimensions in mm (tabletop version)
CoG CoG
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3.2.3 USK 160 S (floor-mounted version)
Height ������������������������������������������������������������������� 1200 mm
Width ���������������������������������������������������������������������� 630 mm
Depth ���������������������������������������������������������������������� 610 mm
Weight ���������������������������������������������������������������� approx. 66 kg
610 mm
630 mm
1200 mm
Figure 3-2 Dimensions in mm (floor-mounted version)
3. Description
CoG CoG
18
3.3 Functional description
The machine is equipped with a wet-grinding belt, a finned grinding wheel and a wet-honing
wheel. The USK 160 S can be alternately equipped with a serration grinding wheel for cutlery
knives and a polishing disc.
In just a few simple steps, you can mount a device (HV 161) that sharpens cutter knives up to
200 ltr. at the correct angle (accessory).
The USK 160 S is available in a tabletop and floor-mounted version.
3. Description
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3. Description
3.4 Description of modules
1 Finned grinding wheel
2 Protection hood left
3 Wet-honing wheel
4 Water tray
5 Machine feet
6 Protection hood right
7 Wet-grinding belt
Figure 3-3 General view of grinding machine (USK 160 S floor-mounted version | HV 161)
8 HV 161 belt grinding attachment
(optional)
9 Base with compartment for accessories
(floor-mounted version only)
6
7
8
9
1
2
3
4
5
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3. Description
Figure 3-4 Side view (left) of grinding machine
(USK 160 S tabletop version)
1 Spray guard
2 Slide guard
3 Water nozzles left
4 “Protection hood” star handles
3.4.1 Control panel
1 “I/0” main switch
1
2
4
3
4
13
Figure 3-5 Control panel
1
Table of contents
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