KNECHT USK160S User manual

Status 08.2023 Version 3.1 | Translation
Operating Instructions
Universal Wet-Sharpening Machine
USK 160 S
Incl. USK160S Table model

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USK160S Universal Wet-Sharpening Machine
Manufacturer
KNECHT Maschinenbau GmbH
Witschwender Straße 26
88368 Bergatreute
Germany
Phone [phone]
Fax [phone]
[email protected]
www.knecht.eu
Documents for machine operator
Operating Instructions
Date of issue of the operating instructions
August 22, 2023
Copyright
These operating instructions as well as the operating documents remain the copyright property of KNECHT
Maschinenbau GmbH. They are supplied only to customers and operators of our products and belong to
the machine.
Without our express permission, these documents may neither be duplicated nor made accessible to third
parties, in particular competitor companies.
Operating Instructions

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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 and mandatory signs and their meaning 8
1.3.1 Warning and mandatory signs on the grinding machine 8
1.3.2 General warning and mandatory signs 8
1.4 Rating plate and machine serial number 9
1.5 Figure and position 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 Malfunctions 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 13
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 areas 13
2.4.9 Instandhaltung (Wartung, Instandsetzung) und Störungsbeseitigung 14
2.4.10 Structural alterations to the grinding machine 14
2.4.11 Cleaning the grinding machine 14
2.4.12 Lubricants/oils and greases 14
2.4.13 Relocation of the grinding machine 14
3. Description 16
3.1 Intended use 16
3.2 Technical specifications 16
3.2.1 General 16
3.2.2 USK160 S (table model) 17
3.2.3 USK160 S (floor model) 18
3.3 Functional description 19
3.3.1 Optional equipment 19
3.4 Description of assemblies 20
3.4.1 Control panel 21
Table of Contents

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3.4.2 HV161 Belt Grinding Attachment (optional, all versions) 22
3.4.3 HV150 Hand Knife Grinding Attachment (optional, all versions) 22
4. Transport 23
4.1 Transport aids 23
4.2 Transport damage 23
4.3 Transport to another installation site 23
5. Installation 24
5.1 Selection of qualified personnel 24
5.2 Installation site 24
5.3 Supply connections 24
5.4 Settings 24
5.5 Initial start-up of the grinding machine 25
6. Commissioning 26
7. Operation 28
7.1 General grinding fundamentals 28
7.2 Switching on the grinding machine 29
7.3 Grinding hand knives 29
7.3.1 Grinding hand knives on the wet-grinding belt 29
7.3.2 Fine-grinding the hand knife on the finned grinding wheel 30
7.3.3 Deburring and polishing the hand knife with the polishing disk 30
7.4 HV150 Hand Knife Grinding Attachment (optional) 32
7.5 Sharpening cutter knives 33
7.5.1 HV161 Belt Grinding Attachment (optional) 33
7.6 Deburring and polishing the cutter knives with the polishing disk 34
7.7 Suction unit 35
7.8 Sharpening and profiling cutlery knives 36
7.8.1 Mounting the serration grinding wheel 36
7.8.2 Pre-grinding the cutlery knife 38
7.8.3 Profiling the cutlery knives 38
7.8.4 Deburring and polishing cutlery knives 39
7.9 Deburring the hand knife and cutter knife on the wet-honing wheel
(optional) 40
7.9.1 Mounting the wet-honing wheel 40
7.9.2 Deburring the hand knife and cutter knife on the wet-honing wheel 45
7.10 Changing the wet-grinding belt 47
7.11 Adjusting the belt movement 49
Table of Contents

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7.12 Changing the polishing disk (wet-honing wheel) 50
7.13 Changing the finned grinding wheel 52
7.14 Coolant device 54
7.15 Cooling the wet-grinding belt 54
7.15.1 Setting the water nozzle 54
7.15.2 Cleaning the water nozzle 55
7.16 Cooling the finned grinding wheel (wet-honing wheel) 57
7.16.1 Adjusting the water nozzle 57
7.16.2 Cleaning the water nozzle 58
8. Care and maintenance 60
8.1 Cleaning 60
8.1.1 Cleaning agent and lubricant table 60
8.2 Maintenance plan (one-shift operation) 61
9. Disassembly and disposal 62
9.1 Disassembly 62
9.2 Disposal 62
10. Service, spare parts and accessories 63
10.1 Postal address 63
10.2 Service 63
10.3 Wear and spare parts 63
10.4 Accessories 64
10.4.1 Abrasives used, etc. 64
11. Appendix 65
11.1 EU Declaration of Conformity 65
Table of Contents

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1.1 Preface to the operating instructions
These operating instructions are intended to make it easy to learn how to use the universal
wet-sharpening machine, hereafter referred to as the grinding machine and to properly utilize its
features.
These operating instructions contain important notes on how to operate the grinding machine
safely, properly and efficiently. Observing these instructions helps to avoid hazards, reduce repair
costs and downtimes and to increase the reliability and service life of the grinding machine.
The operating instructions must always be stored in the location that the grinding machine is
used.
The operating instructions must be read and applied by every person tasked with working with
the grinding machine, e.g.:
• transport, installation, commissioning
• operation, including error rectification during operation, as well as
• servicing (maintenance, repair).
Recognized technical standards for safe and professional work must be observed in addition to
these operating instructions and the binding accident prevention regulations applicable in the
country of use and at the place of use.
1.2 Warnings and symbols in the operating instructions
The operating instructions use the following symbols/ designations that must be followed:
The hazard triangle with the signal word “CAUTION” serves as a work
safety notice for all work for which there is a risk of personal injury or
death.
In these cases, work should be done with special attention and care.
ATTENTION ”ATTENTION” is written in places where special attention must be paid to
prevent damage or destruction of the grinding machine or its surroundings.
NOTE ”NOTICE” refers to user tips and especially useful informations.
1. Important notes
CAUTION

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1.3 Warning and mandatory signs and their meaning
1.3.1 Warning and mandatory signs on the grinding machine
The following warning and mandatory signs have been affixed on the grinding machine:
CAUTION! RISK OF INJURY FROM ABRASIVE PARTICLES
(mandatory sign on the machine front)
Grinding, polishing, deburring and dressing gives rise to grinding
particles which can enter the eyes.
Wearing eye protection is mandatory when carrying out such
work.
1.3.2 General warning and mandatory signs
The following general warning and mandatory signs must be followed:
CAUTION! DANGEROUS ELECTRICAL VOLTAGE
The grinding machine carries life-threatening voltage when it is
connected to the current supply.
Current-carrying device parts may only be opened by authorized
personnel.
The grinding machine must be separated from the mains supply
before carrying out servicing, maintenance and repair work on it.
CAUTION! RISK OF INJURY FROM KNIFE!
Working with the grinding machine involves grinding knives that
could cause serious cut injuries due to their sharpness.
Caution when transporting knives. Use the protective equipment
provided by the knife manufacturer. Protective gloves and safety
shoes must be worn.
1. Important notes

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1.4 Rating plate and machine serial number
The rating plate (1-1) is located on the rear panel
of the machine.
The machine serial number (1-2) can be found on
the rating plate (1-1) and on the right side wall
underneath the wet-grinding belt.
1.5 Figure and position numbers in the operating instructions
If the text makes a reference to a machine component depicted in a figure, the figure and
position number will be given in brackets.
Example: (7-19/1) means figure number 7-19, position 1.
Hold the cutlery knife (7-19/1) at a steep angle (approx.
45°) on the serration grinding wheel (7-19/2).
Then turn slowly until the knife tip is reached.
1. Important notes
Figure 1-1 Rating plate
Figure 1-2 Machine serial number
Figure 7-19 Serrating the cutlery knife
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1

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2.1 Basic safety instructions
2.1.1 Observe notes in the operating instructions
The basic prerequisite for the safe handling and uninterrupted operation of this grinding machine
is knowledge of the basic safety instructions and regulations.
• These operating instructions contain important notes on how to operate the grinding machine
safely.
• All persons carrying out work on the grinding machine must follow these operating instructions,
in particular the safety notices.
• 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 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.
The safety-awareness of the personnel at work will be monitored at regular intervals.
2.1.3 Obligation on the part of the personnel
All personnel working on the grinding machine shall be obliged, before starting work, 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 that they have understood them.
2.1.4 Hazards involved in handling the grinding machine
The grinding machine has been built to the latest technological standards and the recognized 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 persons, or damage to the grinding machine or other property.
The grinding machine may be used only:
• for its intended purpose
• in a safe and secure condition.
Malfunctions that may impair safety are to be eliminated immediately.
2. Safety

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2.1.5 Malfunctions
If safety-relevant malfunctions occur with the grinding machine, or if the processing behavior
indicates that such malfunctions may have occurred, the grinding machine must be stopped
immediately and until such time as the malfunction has been found and eliminated.
Allow only authorized trained personnel to eliminate the malfunctions.
2.2 Intended use
The grinding machine is intended exclusively for grinding, deburring and polishing hand knives,
cutter knives up to 120 l. cutter size and other cutting tools.
Except for hand knives (e.g. boning knives), all knives must be clamped on the corresponding
grinding plates.
Before grinding, first check whether the grinding plate fits the knife to be ground. Only then the
knife may be ground.
Any other use or use beyond this is not considered as intended. KNECHT Maschinenbau GmbH
is not liable for any damage resulting from this. The risk is borne solely the user.
Intended use also includes observing all instructions in the operating manual.
ATTENTION Improper use of the grinding machine exists,
for example, if:
• cutting tools that cannot be guided by hand
are ground without a grinding plate.
• fixtures are not properly attached.
• on the wet-grinding belt, on the finned
grinding wheel, on the polishing disk as
well as on the wet-honing wheel knives are
ground/polished against the cutting edge.
2.3 Warranty and liability
Warranty and liability claims in case of personal injury 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 transport, commissioning, operation and maintenance of the grinding machine,
2. Safety

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• 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,
• unauthorized structural alterations to the grinding machine,
• unauthorized modification, e.g. of the drive conditions (output and speed),
• failure to monitor machine parts that are subject to wear, and
• use of unapproved replacement and wear parts.
Use only original replacement and wear parts. If externally purchased parts are used, it is not
guaranteed that they have been designed and manufactured to meet the requirements in terms
of stress and safety.
2.4 Safety regulations
2.4.1 Organizational measures
Inspect all available safety devices regularly.
Observe prescribed intervals for recurring maintenance work or as specified in the operating
instructions!
2.4.2 Protective equipment
Before every commissioning of the grinding machine, ensure that all protective equipment is
properly mounted and in functional condition.
Protective equipment may be removed only after the grinding machine has stopped and has
been secured against accidental restart.
When attaching spare parts, 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 locally
relevant accident prevention regulations must also be made available and observed.
All safety alert symbols and hazard warnings on the grinding machine must be complete and
clearly legible.
2. Safety

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2.4.4 Selection and qualification of personnel
Only trained and instructed personnel may work on the grinding machine. Observe the legally
permitted minimum age!
The responsibilities of personnel with respect to commissioning, operation, maintenance and
repair must be clearly specified.
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 permitted to switch on and operate the machine.
2.4.6 Safety measures in normal operation
Do not operate the machine in any unsafe manner. Only operate the grinding machine if all the
safety devices are installed and fully functional.
At least once per shift (or per day), check the grinding machine for externally visible damage and
proper functioning of the safety devices.
Immediately report any changes present (including those of the operating behavior) to the
responsible office or person. If necessary, immediately shut down the grinding machine and
secure it against restart.
Before you switch on the grinding machine, ensure that no one can be injured by the start-up
of the machine.
In the event of a malfunction, immediately stop the grinding machine and secure it against re-
start. Rectify malfunctions immediately.
2.4.7 Hazards due to electrical power sources
Work on electrical systems or operating materials may only be performed by a qualified
electrician, in accordance with electrical regulations.
Defects, such as damaged cables, cable connections, etc. must be immediately rectified by an
authorized specialist.
2.4.8 Particular hazard areas
In the area of the grinding stations there is a hazard of pinching and of drawing in e.g. clothing,
fingers and hair. Suitable personal protective equipment must be worn.
2. Safety

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2.4.9 Instandhaltung (Wartung, Instandsetzung) und Störungsbeseitigung
Maintenance work is to be carried out on schedule by trained personnel. Inform operating
personnel before beginning repair work. Designate a supervisor responsible for this.
For all service work, the grinding machine is to be disconnected from the current supply and
secured against accidental restart.
Remove power plug. Secure repair area as necessary.
After completing maintenance work and rectifying any faults, install all safety devices and verify
that they are fully functional.
2.4.10 Structural alterations to the grinding machine
Do not make any changes, additions or conversions to the grinding machine without the approval
of the manufacturer. This also applies to the installation and setup of safety devices.
Any conversion work requires the written permission from KNECHT Maschinenbau GmbH.
Immediately replace machine parts that are not in perfect condition.
Use only original replacement and wear parts. If externally purchased parts are used, it is not
guaranteed that they have been designed and manufactured to meet the requirements in terms
of stress and safety.
2.4.11 Cleaning the grinding machine
Properly handle any cleaning agents and materials used and dispose of them in an environ-
mentally-friendly manner.
Dispose of the wear parts and replacement parts in a safe and environmentally-friendly manner.
2.4.12 Lubricants/oils and greases
When using oils and greases, follow the safety regulations applicable to the product. Comply with
the special regulations for the food areas.
2.4.13 Relocation of the grinding machine
Disconnect the grinding machine from any external power supply, even in the event of a minor
change of location. Before restarting the grinding machine, connect it properly to the power
supply.
For loading work, use only lifting equipment and load-bearing devices with sufficient lifting
capacity. Appoint a qualified instructor for the lifting operation.
No persons other than those designated for this work may be present in the loading and
installation area.
2. Safety

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Only lift the grinding machine properly with lifting gear as specified in the operating instructions.
Only use a suitable transport vehicle with sufficient load-bearing capacity. Secure the load reliably.
Use suitable attachment points.
When restarting the machine, proceed only in accordance with the operating instructions.
2. Safety

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3. Description
3.1 Intended use
The USK160 S Universal Wet-Sharpening Machine can be used to sharpen, deburr and polish
hand knives, cutter knives up to cutter size 120l., cutlery knives and other cutting tools.
3.2 Technical specifications
3.2.1 General
Power supply* ������������������������������������������������������������� 3x 400 V
Mains frequency* �������������������������������������������������������������� 50 Hz
Power Output* ��������������������������������������������������������������� 0,7 kW
Power consumption* ���������������������������������������������������������� 0,8 kW
Current consumption* ������������������������������������������������������������ 2 A
Back-up fuse ������������������������������������������������������������������� 16 A
Operating noise level (Measured A-weighted emission ��������������������� approx. 85 dB (A)
sound pressure level at workplace LpA)**
Diameter polishing disk (wet-honing wheel) �������������������������������������� 150 mm
Speed wet-grinding belt/ polishing disk (wet-honing wheel) ��������������������� 2500 1/min
Diameter finned grinding wheel ������������������������������������������������ 150 mm
Speed finned grinding wheel ����������������������������������������������� 2500 1/min
Diameter serration grinding wheel ���������������������������������������������� 150 mm
Speed serration grinding wheel ��������������������������������������������� 2500 1/min
*) This information may change depending on the electrical current supply.
**) Two-digit sound emission value according to EN ISO 4871 (measurement uncertainty KpA. 3 dB (A)). Emission
sound pressure level according to EN ISO 11201. Sharpened was a hand knife from the Giesser company.

450 mm
570 mm
630 mm
450 mm
570 mm
630 mm
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3. Description
3.2.2 USK160S (table model)
Height �������������������������������������������������������������� approx. 450 mm
Width ��������������������������������������������������������������� approx. 630 mm
Depth ��������������������������������������������������������������� approx. 570 mm
Space requirement (WxD) �������������������������������������� approx. 1200 x 1200 mm
Weight ���������������������������������������������������������������� approx. 46 kg
Figure 3-1 Dimensions in mm (table model)
CoG CoG

1150 mm
590 mm
630 mm
1150 mm
590 mm
630 mm
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3.2.3 USK160S (floor model)
Height ������������������������������������������������������������ approx. 1150 mm
Width ��������������������������������������������������������������� approx. 630 mm
Depth ��������������������������������������������������������������� approx. 590 mm
Space requirement (WxD) �������������������������������������� approx. 1200 x 1200 mm
Weight ���������������������������������������������������������������� approx. 70 kg
Figure 3-2 Dimensions in mm (floor model)
3. Description
CoG CoG

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3.3 Functional description
The USK160 S Universal Wet-Sharpening Machine can be used to sharpen, deburr and polish
hand knives from 50–550 mm in length.
The grinding machine is equipped with a wet-grinding belt, a finned grinding wheel and a
polishing disk.
3.3.1 Optional equipment
Wet-honing wheel
Instead of the polishing disk, the machine can be equipped with a water-cooled wet-honing
wheel.
HV150 Hand Knife Grinding Attachment
The HV150 Hand Knife Grinding Attachment ensures that hand knives are always ground
with the same cutting edge angle.
Serration grinding wheel
For grinding and serrating cutlery knives, the USK160 S can be equipped with a water-cooled
serration grinding wheel.
HV161 Belt Grinding Attachment
Sickle-shaped cutter knives up to 120l. cutter size are resharpened angle true with the
HV161 Belt Grinding Attachment.
Table/ floor model
The USK160 S is available as a table and floor model.
3. Description

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3. Description
3.4 Description of assemblies
1 Finned grinding wheel
2 Polishing disk
3 Suction unit
4 Water tray
5 Machine feet
6 Wet-grinding belt
7 HV161 Belt Grinding Attachment (optional)
8 Base with storage space for accessories (only floor model)
Figure 3-3 General view of sharpening machine (USK160S floor model | HV161)
6
7
8
1
2
3
4
5

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3. Description
Figure 3-4 Side view (left) sharpening machine (USK160S table model)
1 Splash guard
2 Star handles of protection hood
3 Safety slides
4 Water supply finned grinding wheel
5 Suction nozzle polishing disk
3.4.1 Control panel
1 ON/ OFF switch “I/ 0”
1
4
2
3
5
2
Figure 3-5 Control panel
1