SCHUNK LOG 20 - 25 User instructions

Translation of the Original Manual
Assembly and Operating Manual
LOG
Hole Gripper

Imprint
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Imprint
Copyright:
This manual is protected by copyright. The author is SCHUNK GmbH & Co. KG. All rights
reserved. Any reproduction, processing, distribution (making available to third parties),
translation or other usage - even excerpts - of the manual is especially prohibited and
requires our written approval.
Technical changes:
We reserve the right to make alterations for the purpose of technical improvement.
Document number: 389509
Version: 04.00|23/11/2020|en
© SCHUNK GmbH & Co. KG
All rights reserved.
Dear Customer,
thank you for trusting our products and our family-owned company, the leading
technology supplier of robots and production machines.
Our team is always available to answer any questions on this product and other solutions.
Ask us questions and challenge us. We will find a solution!
Best regards,
Your SCHUNK team
Customer Management
Tel. [phone]
Fax [phone]
[email protected]
Please read the operating manual in full and keep it close to the product.

Table of Contents
Table of Contents
1 General.................................................................................................................... 5
1.1 About this manual ................................................................................................ 5
1.1.1 Presentation of Warning Labels ...............................................................5
1.1.2 Applicable documents ..............................................................................6
1.2 Warranty .............................................................................................................. 6
1.3 Scope of delivery .................................................................................................. 7
1.4 Accessories ........................................................................................................... 7
2 Basic safety notes ................................................................................................... 8
2.1 Intended use......................................................................................................... 8
2.2 Not intended use.................................................................................................. 8
2.3 Constructional changes ........................................................................................ 8
2.4 Spare parts ........................................................................................................... 8
2.5 Gripper fingers ..................................................................................................... 9
2.6 Environmental and operating conditions ............................................................. 9
2.7 Personnel qualification....................................................................................... 10
2.8 Personal protective equipment.......................................................................... 10
2.9 Notes on safe operation .....................................................................................11
2.10 Transport ............................................................................................................ 11
2.11 Malfunctions....................................................................................................... 11
2.12 Disposal .............................................................................................................. 11
2.13 Fundamental dangers......................................................................................... 12
2.13.1 Protection during handling and assembly ..............................................12
2.13.2 Protection during commissioning and operation ...................................12
2.13.3 Protection against dangerous movements.............................................13
2.13.4 Protection against electric shock............................................................13
2.14 Notes on particular risks..................................................................................... 14
3 Technical Data ........................................................................................................15
4 Assembly ................................................................................................................16
4.1 Mechanical connection ...................................................................................... 16
4.2 Air connections................................................................................................... 17
5 Troubleshooting .....................................................................................................18
5.1 Product does not move? .................................................................................... 18
5.2 The product does not travel through the entire stroke?....................................18
5.3 Product opens or closes abruptly? .....................................................................18
5.4 The gripping force drops?................................................................................... 18
5.5 Product does not achieve the opening and closing times? ................................ 18
6 Maintenance and Care............................................................................................19
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Table of Contents
7 Translation of original declaration of incorporation ................................................20
8 Annex to Declaration of Incorporation....................................................................21
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General
1 General
1.1 About this manual
This manual contains important information for a safe and
appropriate use of the product.
This manual is an integral part of the product and must be kept
accessible for the personnel at all times.
Before starting work, the personnel must have read and
understood this operating manual. Prerequisite for safe working is
the observance of all safety instructions in this manual.
Illustrations in this manual are provided for basic understanding
and may differ from the actual product design.
In addition to these instructions, the documents listed under
Applicable documents [}6] are applicable.
1.1.1 Presentation of Warning Labels
To make risks clear, the following signal words and symbols are
used for safety notes.
DANGER
Danger for persons!
Non-observance will inevitably cause irreversible injury or death.
WARNING
Dangers for persons!
Non-observance can lead to irreversible injury and even death.
CAUTION
Dangers for persons!
Non-observance can cause minor injuries.
CAUTION
Material damage!
Information about avoiding material damage.
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General
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1.1.2 Applicable documents
• General terms of business *
• Catalog data sheet of the purchased product *
• Assembly and operating manuals of the accessories *
The documents marked with an asterisk (*) can be downloaded on
our homepage schunk.com
1.2 Warranty
If the product is used as intended, the warranty is valid for 24
months from the ex-works delivery date under the following
conditions:
• Observe the applicable documents,
Applicable documents [}6]
• Observe the ambient conditions and operating conditions,
Environmental and operating conditions [}9]
• Observe the maximum service life. Technical Data [}15]
• Observe the specified maintenance and lubrication intervals,
Maintenance and Care [}19]
Wearing surfaces that come into contact with the workpiece are
excluded from the warranty.
At high temperatures a shorter life span can be expected.

General
The product is not considered defective if it warps plastically
within the specified limits.The permissible warp is dependent on
the workpiece diameter.
Symbol
[mm]
Designation
D0Gripper - Ø D
DkMax. value to which the gripper - Ø D creeps
DwWorkpiece diameter
Dmax Max. workpiece diameter
1.3 Scope of delivery
The scope of delivery includes
• Hole Gripper LOG in the version ordered
• Assembly and Operating Manual
1.4 Accessories
A wide range of accessories are available for this product
For information regarding which accessory articles can be used
with the corresponding product variants, see catalog data sheet.
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Basic safety notes
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2 Basic safety notes
2.1 Intended use
The product is designed exclusively for gripping and temporarily
holding workpieces or objects.
• The product may only be used within the scope of its technical
data, Technical Data [}15].
• When implementing and operating components in safety-
related parts of the control systems, the basic safety principles
in accordance with DIN EN ISO 13849-2 apply. The proven safety
principles in accordance with DIN EN ISO 13849-2 also apply to
categories 1, 2, 3 and 4.
• The product is intended for installation in a machine/system.
The applicable guidelines must be observed and complied with.
• The product is intended for industrial and industry-oriented use.
• Appropriate use of the product includes compliance with all
instructions in this manual.
2.2 Not intended use
It is not intended use if the product is used, for example, as a
pressing tool, stamping tool, lifting gear, guide for tools, cutting
tool, clamping device or a drilling tool.
• Any utilization that exceeds or differs from the appropriate use
is regarded as misuse.
2.3 Constructional changes
Implementation of structural changes
By conversions, changes, and reworking, e.g. additional threads,
holes, or safety devices can impair the functioning or safety of the
product or damage it.
• Structural changes should only be made with the written
approval of SCHUNK.
2.4 Spare parts
Use of unauthorized spare parts
Using unauthorized spare parts can endanger personnel and
damage the product or cause it to malfunction.
• Use only original spare parts or spares authorized by SCHUNK.

Basic safety notes
2.5 Gripper fingers
Requirements of gripper fingers
Accumulated energy can make the product unsafe and risk the
danger of serious injuries and considerable material damage.
• Execute the gripper fingers in such a way that the product
reaches either the "open" or "closed" position in a de-energized
state.
• Only change gripper fingers if no residual energy can be
released.
• Make sure that the product and the top jaws are a sufficient
size for the application.
2.6 Environmental and operating conditions
• Make sure that the product and the top jaws are a sufficient
size for the application.
• Ensure that the environment is clean.
• Make sure that the environment is free from splash water and
vapors as well as from abrasion or processing dust. This
excludes products that are designed specially for contaminated
environments.
• Prevent the LOG hole grippers remain pressurized with
compressed air for a long time (>1hour) (e.g. in case of
machine shutdown or overnight). In addition, idle strokes
(opening the gripper without a workpiece) are to be avoided.
• For production reasons, it is possible that powder granules
come loose on the gripper (inside and outside) during
operation. Therefore, the use of a filter for the compressed air
is recommended.
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Basic safety notes
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2.7 Personnel qualification
Inadequate qualifications of the personnel
If the personnel working with the product is not sufficiently
qualified, the result may be serious injuries and significant
property damage.
• All work may only be performed by qualified personnel.
• Before working with the product, the personnel must have read
and understood the complete assembly and operating manual.
• Observe the national safety regulations and rules and general
safety instructions.
The following personal qualifications are necessary for the various
activities related to the product:
Trained electrician Due to their technical training, knowledge and experience, trained
electricians are able to work on electrical systems, recognize and
avoid possible dangers and know the relevant standards and
regulations.
Qualified personnel Due to its technical training, knowledge and experience, qualified
personnel is able to perform the delegated tasks, recognize and
avoid possible dangers and knows the relevant standards and
regulations.
Instructed person Instructed persons were instructed by the operator about the
delegated tasks and possible dangers due to improper behaviour.
Service personnel of
the manufacturer
Due to its technical training, knowledge and experience, service
personnel of the manufacturer is able to perform the delegated
tasks and to recognize and avoid possible dangers.
2.8 Personal protective equipment
Use of personal protective equipment
Personal protective equipment serves to protect staff against
danger which may interfere with their health or safety at work.
• When working on and with the product, observe the
occupational health and safety regulations and wear the
required personal protective equipment.
• Observe the valid safety and accident prevention regulations.
• Wear protective gloves to guard against sharp edges and
corners or rough surfaces.
• Wear heat-resistant protective gloves when handling hot
surfaces.
• Wear protective gloves and safety goggles when handling
hazardous substances.
• Wear close-fitting protective clothing and also wear long hair in
a hairnet when dealing with moving components.

Basic safety notes
2.9 Notes on safe operation
Incorrect handling of the personnel
Incorrect handling and assembly may impair the product's safety
and cause serious injuries and considerable material damage.
• Avoid any manner of working that may interfere with the
function and operational safety of the product.
• Use the product as intended.
• Observe the safety notes and assembly instructions.
• Do not expose the product to any corrosive media. This does
not apply to products that are designed for special
environments.
• Eliminate any malfunction immediately.
• Observe the care and maintenance instructions.
• Observe the current safety, accident prevention and
environmental protection regulations regarding the product's
application field.
2.10 Transport
Handling during transport
Incorrect handling during transport can make the product unsafe
and risk the danger of serious injuries and considerable material
damage.
• During transport and handling, secure the product to prevent it
from falling.
• Do not walk under suspended loads.
2.11 Malfunctions
Behavior in case of malfunctions
• Immediately remove the product from operation and report the
malfunction to the responsible departments/persons.
• Order appropriately trained personnel to rectify the
malfunction.
• Do not recommission the product until the malfunction has
been rectified.
• Test the product after a malfunction to establish whether it still
functions properly and no increased risks have arisen.
2.12 Disposal
Handling of disposal
The incorrect handling of disposal may impair the product's safety
and cause serious injuries as well as considerable material and
environmental harm.
• Follow local regulations on dispatching product components for
recycling or proper disposal.
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Basic safety notes
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2.13 Fundamental dangers
General
• Observe safety distances.
• Never deactivate safety devices.
• Before commissioning the product, take appropriate protective
measures to secure the danger zone.
• Disconnect power sources before installation, modification,
maintenance, or calibration. Ensure that no residual energy
remains in the system.
• If the energy supply is connected, do not move any parts by
hand.
• Do not reach into the open mechanism or movement area of
the product during operation.
2.13.1 Protection during handling and assembly
Incorrect handling and assembly
Incorrect handling and assembly may impair the product's safety
and cause serious injuries and considerable material damage.
• Have all work carried out by appropriately qualified personnel.
• For all work, secure the product against accidental operation.
• Observe the relevant accident prevention rules.
• Use suitable assembly and transport equipment and take
precautions to prevent jamming and crushing.
Incorrect lifting of loads
Falling loads may cause serious injuries and even death.
• Stand clear of suspended loads and do not step into their
swiveling range.
• Never move loads without supervision.
• Do not leave suspended loads unattended.
2.13.2 Protection during commissioning and operation
Falling or violently ejected components
Falling and violently ejected components can cause serious injuries
and even death.
• Take appropriate protective measures to secure the danger
zone.
• Never step into the danger zone during operation.

Basic safety notes
2.13.3 Protection against dangerous movements
Unexpected movements
Residual energy in the system may cause serious injuries while
working with the product.
• Switch off the energy supply, ensure that no residual energy
remains and secure against inadvertent reactivation.
• Never rely solely on the response of the monitoring function to
avert danger. Until the installed monitors become effective, it
must be assumed that the drive movement is faulty, with its
action being dependent on the control unit and the current
operating condition of the drive. Perform maintenance work,
modifications, and attachments outside the danger zone
defined by the movement range.
• To avoid accidents and/or material damage, human access to
the movement range of the machine must be restricted. Limit/
prevent accidental access for people in this area due through
technical safety measures. The protective cover and protective
fence must be rigid enough to withstand the maximum possible
movement energy. EMERGENCY STOP switches must be easily
and quickly accessible. Before starting up the machine or
automated system, check that the EMERGENCY STOP system is
working. Prevent operation of the machine if this protective
equipment does not function correctly.
2.13.4 Protection against electric shock
Possible electrostatic energy
Components or assembly groups may become electrostatically
charged. When the electrostatic charge is touched, the discharge
may trigger a shock reaction leading to injuries.
• The operator must ensure that all components and assembly
groups are included in the local potential equalisation in
accordance with the applicable regulations.
• While paying attention to the actual conditions of the working
environment, the potential equalisation must be implemented
by a specialist electrician according to the applicable
regulations.
• The effectiveness of the potential equalisation must be verified
by executing regular safety measurements.
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Basic safety notes
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2.14 Notes on particular risks
WARNING
Risk of injury from objects falling and being ejected!
Falling and ejected objects during operation can lead to serious
injury or death.
•Take appropriate protective measures to secure the danger
zone.
CAUTION
Danger of crushing between the gripper housing and base jaws
Fingers or body parts can be crushed if they get into the openings
between the gripper housing and base jaws during operation.
•When the air supply is connected, do not reach into the
openings between the gripper housing and base jaws.

Technical Data
3 Technical Data
Technical Data
Designation LOG 20 - 99
Pressure medium Compressed air, compressed air
quality according to
ISO 8573-1:7 4 4
Nominal working pressure [bar] 6
Max. pressure [bar] 6
Noise emission [dB(A)] ≤ 70
The gripping force can be set directly by the operating pressure. At
a lower pressure than the nominal operating pressure, the full
stroke cannot be achieved.
Warranty
Designation LOG 20 - 99
Warranty duration [months] 24
or maximum cycles [piece] 5.000.000
More technical data is included in the catalog data sheet.
Whichever is the latest version.
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Assembly
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4 Assembly
4.1 Mechanical connection
Evenness of the
mounting surface
The values apply to the whole mounting surface to which the
product is mounted.
Requirements for evenness of the mounting surface (Dimensions in mm)
Edge length Permissible unevenness
< 100 < 0.02
> 100 < 0.05
Mounting The product can be mounted in a threaded hole or a through-hole
with a corresponding counter nut.
SCHUNK recommends a 1mm larger through-hole for mounting
the gauge block to be able to align the gripper.
Assembly options
1 Mounting with threaded hole
2 Mounting with through-hole and nut
(preferred variant for gauge block mounting)
Mounting thread
Designation LOG
20 – 25 26 – 63 64 – 99
Mounting thread on the
product
M14 x 1.5 M16 x 1 M20 x 1.5
Length [mm] 17

Assembly
4.2 Air connections
CAUTION
Observe the requirements for the air supply
Technical Data [}15].
The product has an air connection, but has two ways of supplying
air.
Air connections
1Air connection from above (hose connection)
M5 (LOG 20 - 63) and G 1/8' (LOG 64 - 99)
2Internal air supply (hose-free direct connection)
The connection is sealed by the O-ring. A suitable surface
finish in the plate is required.
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Troubleshooting
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5 Troubleshooting
5.1 Product does not move?
Possible cause Corrective action
Pressure drops below minimum. Check air supply.Air connections [}17]
Component part defective. Replace the gripper completely.
Make sure that the product was only used in
the context of its defined application
parameters Technical Data [}15].
5.2 The product does not travel through the entire stroke?
Possible cause Corrective action
Dirt deposits between the end stops Clean the product.
Pressure drops below minimum. Check air supply.
Air connections [}17]
Mounting surface is not sufficiently flat. Check the evenness of the mounting surface.
Mechanical connection [}16]
Component part defective. Replace the gripper completely.
5.3 Product opens or closes abruptly?
Possible cause Corrective action
Compressed air lines blocked. Check compressed air lines of damage.
5.4 The gripping force drops?
Possible cause Corrective action
Compressed air can escape. Check seals, replace product if necessary.
Pressure drops below minimum. Check air supply.
Air connections [}17]
5.5 Product does not achieve the opening and closing times?
Possible cause Corrective action
Compressed air lines are not installed
optimally.
Check compressed air lines.
Inner diameters of compressed air lines are
of sufficient size in relation to compressed
air consumption.
Keep compressed air lines between the
product and directional control valve as
short as possible.
Flow rate of valve is sufficiently large
relative to the compressed air consumption.

Maintenance and Care
6 Maintenance and Care
The product is not intended for maintenance.
Disassembly for maintenance or repair purposes is not possible.
A damaged product has to be replaced completely.
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Translation of original declaration of incorporation
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7 Translation of original declaration of incorporation
in terms of the Directive 2006/42/EG, Annex II, Part 1.B of the European Parliament and of
the Council on machinery.
Manufacturer/
Distributor
SCHUNK GmbH & Co. KG Clamping and gripping technology
Bahnhofstr. 106 - 134
D-74348 Lauffen/Neckar
We hereby declare that on the date of the declaration the following partly completed
machine complied with all basic safety and health regulations found in the directive
2006/42/EC of the European Parliament and of the Council on machinery. The declaration
is rendered invalid if modifications are made to the product.
Product designation: Hole Gripper / LOG / pneumatic
ID number 0398920 ... 0398999
The partly completed machine may not be put into operation until conformity of the
machine into which the partly completed machine is to be installed with the provisions of
the Machinery Directive (2006/42/EC) is confirmed.
Applied harmonized standards, especially:
EN ISO 12100:2010 Safety of machinery - General principles for design -
Risk assessment and risk reduction
The manufacturer agrees to forward on demand the relevant technical documentation for
the partly completed machinery in electronic form to national authorities.
The relevant technical documentation according to AnnexVII, Part B, belonging to the
partly completed machinery, has been created.
Person authorized to compile the technical documentation:
Robert Leuthner, Address: see manufacturer's address
Lauffen/Neckar, November 2020 p.p. Ralf Winkler; Head of Technology & Engineering,
Mechanics Gripping Systems