SCHUNK SRH-plus 20 User instructions

Assembly and Operating Manual
SRH-plus
Pneumatic rotary actuator
Translation of the original operating
manual

Imprint
2 09.00 | SRH-plus | Assembly and Operating Manual | en | 389428
Imprint
Copyright:
This manual is protected by copyright. The author is SCHUNK SE & Co. KG.
All rights reserved.
Technical changes:
We reserve the right to make alterations for the purpose of technical improvement.
Document number: 389428
Version: 09.00|27/07/2023|en
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]
[e-mail]
Please read the operating manual in full and keep it close to the product.

Table of contents
09.00 | SRH-plus | Assembly and Operating Manual | en | 389428 3
Table of Contents
1 General ............................................................................................. 6
1.1 About this manual............................................................................... 6
1.1.1 Presentation of Warning Labels ..................................................... 6
1.1.2 Definition of Terms ..................................................................... 6
1.1.3 Applicable documents ................................................................. 7
1.1.4 Sizes........................................................................................ 7
1.1.5 Variants ................................................................................... 7
1.2 Warranty ........................................................................................... 7
1.3 Accessory kit ...................................................................................... 8
1.4 Accessories ........................................................................................ 8
1.5 Sealing kit ......................................................................................... 8
2 Basic safety notes ................................................................................ 9
2.1 Intended use...................................................................................... 9
2.2 Not intended use ................................................................................ 9
2.3 Constructional changes......................................................................... 9
2.4 Spare parts ........................................................................................ 9
2.5 Ambient conditions and operating conditions ........................................... 10
2.6 Personnel qualification ........................................................................ 10
2.7 Personal protective equipment .............................................................. 11
2.8 Notes on safe operation........................................................................ 11
2.9 Transport........................................................................................... 11
2.10 Malfunctions ...................................................................................... 12
2.11 Disposal ............................................................................................ 12
2.12 Fundamental dangers .......................................................................... 12
2.12.1 Protection during handling and assembly ....................................... 12
2.12.2 Protection during commissioning and operation ............................... 13
2.12.3 Protection against dangerous movements ....................................... 13
2.12.4 Protection against electric shock.................................................... 14
2.13 Notes on particular risks ....................................................................... 14
3 Technical data ..................................................................................... 16
3.1 Type key............................................................................................ 16
3.2 Basic data ......................................................................................... 16
4 Design and description .......................................................................... 17
4.1 Design .............................................................................................. 17
4.2 Description ........................................................................................ 17

Table of contents
4 09.00 | SRH-plus | Assembly and Operating Manual | en | 389428
5 Assembly............................................................................................ 18
5.1 Installing and connecting .................................................................... 18
5.2 Connections ....................................................................................... 20
5.2.1 Mechanical connection................................................................ 20
5.2.2 Pneumatic connection................................................................. 22
5.2.3 Electrical connection................................................................... 24
5.3 Settings............................................................................................. 26
5.3.1 Adjust swivel angle..................................................................... 27
5.3.2 Adjust swiveling speed ................................................................ 30
5.3.3 Adjust absorber stroke................................................................. 31
5.4 Mounting the sensor............................................................................ 33
5.4.1 Overview of sensors .................................................................... 33
5.4.2 Mounting MMS 22 magnetic switch................................................. 33
5.4.3 Mounting MMS 22-PI1 magnetic switch............................................ 35
5.4.4 Assemble inductive proximity switch IN 80 ...................................... 36
6 Start-up ............................................................................................ 38
6.1 Setting ranges of the variants ................................................................ 38
6.2 Base unit........................................................................................... 38
7 Troubleshooting................................................................................... 39
7.1 Product does not move smoothly to the end positions ................................ 39
7.2 Product does not travel through the rotating angle .................................... 39
7.3 Product rotates jerkily .......................................................................... 39
7.4 Product does not move......................................................................... 39
7.5 Torque is diminishing .......................................................................... 40
8 Maintenance ....................................................................................... 41
8.1 Notes................................................................................................ 41
8.2 Maintenance interval ........................................................................... 41
8.3 Lubricants/Lubrication points (basic lubrication) ........................................ 42
8.4 Inspect and set shock absorbers ............................................................. 43
8.4.1 Inspect shock absorbers............................................................... 43
8.4.2 Set shock absorber overhang ........................................................ 43
8.4.3 Shock absorber types and shock absorber overlap (h)......................... 43
8.5 Servicing shock absorber....................................................................... 45
8.5.1 Servicing shock absorbers (absorber variant -W) ............................... 45
8.5.2 Servicing shock absorbers (absorber variant -S) ................................ 46
8.6 Changing shock absorbers (base unit) ...................................................... 47
8.7 Dismantling and assembling swivel unit .................................................. 48
8.8 Assembly drawing ............................................................................... 49
8.8.1 SRU assembly group.................................................................... 50
8.8.2 Assembly SRH ............................................................................ 52

Table of contents
09.00 | SRH-plus | Assembly and Operating Manual | en | 389428 5
9 Translation of the original declaration of incorporation ................................. 56
10 UKCA declaration of incorporation ............................................................ 57
11 Information on the RoHS Directive, REACH Regulation and Substances of Very High
Concern (SVHC) ..................................................................................... 58

General
6 09.00 | SRH-plus | Assembly and Operating Manual | en | 389428
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.
In addition to these instructions, the documents listed
under }1.1.3 [/7] are applicable.
NOTE: The illustrations in this manual are intended to provide a
basic understanding and may deviate from the actual version.
1.1.1 Presentation of Warning Labels
To make risks clear, the following signal words and symbols are
used for safety notes.
DANGER
Dangers 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.
1.1.2 Definition of Terms
The term "product" replaces the product name on the title page
in this manual.

General
09.00 | SRH-plus | Assembly and Operating Manual | en | 389428 7
1.1.3 Applicable documents
lGeneral terms of business *
lCatalog data sheet of the purchased product *
lAssembly and operating manuals of the accessories *
The documents labeled with an asterisk (*) can be downloaded
from schunk.com.
1.1.4 Sizes
This operating manual applies to the following sizes:
lSRH-plus 20
lSRH-plus 25
lSRH-plus 30
lSRH-plus 35
lSRH-plus 40
lSRH-plus 50
lSRH-plus 60
1.1.5 Variants
This operating manual applies to the following variations:
lSRH-plus with electrical feed-through (EDF) and lateral cable
outlet
lSRH-plus with electrical feed-through (EDF) and axial cable
outlet
lSRH-plus with center bore (CB)
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:
lObserve the specified maintenance and lubrication intervals
lObserve the ambient conditions and operating conditions
Parts touching the workpiece and wear parts are not included in
the warranty.

General
8 09.00 | SRH-plus | Assembly and Operating Manual | en | 389428
1.3 Accessory kit
20 25 30 35 40 50 60
With media feed-through
5514982 5514986 5518654 5514990 5514994 5514998 5515002
Tab.: ID Accessory kit SRH-plus
Content of the accessories pack: }8.8 [/49].
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.
1.5 Sealing kit
20 25 30 35 40 50 60
With media feed-through
5521800 5521802 5521804 5521806 5521808 5521810 5521812
With center bore
5521799 5521801 5521803 5521805 5521807 5521809 5521811
Tab.: ID Sealing kit SRH-plus
contents of the sealing kit,}8.8 [/49].

Basic safety notes
09.00 | SRH-plus | Assembly and Operating Manual | en | 389428 9
2 Basic safety notes
2.1 Intended use
The product may only be used for swiveling permissible
attachment parts or workpieces.
lThe product may only be used within the scope of its technical
data, }3 [/16].
lWhen 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.
lThe product is intended for installation in a machine/
automated system. The applicable guidelines for the machine/
automated system must be observed and complied with.
lThe product is intended for industrial and industry-oriented
use.
lAppropriate use of the product includes compliance with all
instructions in this manual.
2.2 Not intended use
Inappropriate use includes using the product as a cutting tool or
drilling tool, for example.
lAny 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.
lStructural 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.
lUse only original spare parts or spares authorized by SCHUNK.

Basic safety notes
10 09.00 | SRH-plus | Assembly and Operating Manual | en | 389428
2.5 Ambient conditions and operating conditions
Required ambient conditions and operating conditions
Incorrect ambient and operating conditions can make the
product unsafe, leading to the risk of serious injuries,
considerable material damage and/or a significant reduction to
the product's life span.
lMake sure that the product is used only in the context of its
defined application parameters, }3 [/16].
lMake sure that the product is a sufficient size for the
application.
lMake sure that the environment is free from splash water and
vapors as well as from abrasion or processing dust. Exceptions
are products that are designed especially for contaminated
environments.
2.6 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.
lAll work may only be performed by qualified personnel.
lBefore working with the product, the personnel must have
read and understood the complete assembly and operating
manual.
lObserve 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.

Basic safety notes
09.00 | SRH-plus | Assembly and Operating Manual | en | 389428 11
2.7 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.
lWhen working on and with the product, observe the
occupational health and safety regulations and wear the
required personal protective equipment.
lObserve the valid safety and accident prevention regulations.
lWear protective gloves to guard against sharp edges and
corners or rough surfaces.
lWear heat-resistant protective gloves when handling hot
surfaces.
lWear protective gloves and safety goggles when handling
hazardous substances.
lWear close-fitting protective clothing and also wear long hair
in a hairnet when dealing with moving components.
2.8 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.
lAvoid any manner of working that may interfere with the
function and operational safety of the product.
lUse the product as intended.
lObserve the safety notes and assembly instructions.
lDo not expose the product to any corrosive media. This does
not apply to products that are designed for special
environments.
lEliminate any malfunction immediately.
lObserve the care and maintenance instructions.
lObserve the current safety, accident prevention and
environmental protection regulations regarding the product's
application field.
2.9 Transport
Handling during transport
Incorrect handling during transport may impair the product's
safety and cause serious injuries and considerable material
damage.
lWhen handling heavy weights, use lifting equipment to lift
the product and transport it by appropriate means.

Basic safety notes
12 09.00 | SRH-plus | Assembly and Operating Manual | en | 389428
lSecure the product against falling during transportation and
handling.
lStand clear of suspended loads.
2.10 Malfunctions
Behavior in case of malfunctions
lImmediately remove the product from operation and report
the malfunction to the responsible departments/persons.
lOrder appropriately trained personnel to rectify the
malfunction.
lDo not recommission the product until the malfunction has
been rectified.
lTest the product after a malfunction to establish whether it
still functions properly and no increased risks have arisen.
2.11 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.
lFollow local regulations on dispatching product components
for recycling or proper disposal.
2.12 Fundamental dangers
General
lObserve safety distances.
lNever deactivate safety devices.
lBefore commissioning the product, take appropriate
protective measures to secure the danger zone.
lDisconnect power sources before installation, modification,
maintenance, or calibration. Ensure that no residual energy
remains in the system.
lIf the energy supply is connected, do not move any parts by
hand.
lDo not reach into the open mechanism or movement area of
the product during operation.
2.12.1 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.
l
Have all work carried out by appropriately qualified personnel.

Basic safety notes
09.00 | SRH-plus | Assembly and Operating Manual | en | 389428 13
lFor all work, secure the product against accidental operation.
lObserve the relevant accident prevention rules.
lUse 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.
lStand clear of suspended loads and do not step into their
swiveling range.
lNever move loads without supervision.
lDo not leave suspended loads unattended.
2.12.2 Protection during commissioning and operation
Falling or violently ejected components
Falling and violently ejected components can cause serious
injuries and even death.
lTake appropriate protective measures to secure the danger
zone.
lNever step into the danger zone during operation.
2.12.3 Protection against dangerous movements
Unexpected movements
Residual energy in the system may cause serious injuries while
working with the product.
lSwitch off the energy supply, ensure that no residual energy
remains and secure against inadvertent reactivation.
lNever 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.
lTo 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.

Basic safety notes
14 09.00 | SRH-plus | Assembly and Operating Manual | en | 389428
2.12.4 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.
lThe operator must ensure that all components and assembly
groups are included in the local potential equalisation in
accordance with the applicable regulations.
lWhile 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.
lThe effectiveness of the potential equalisation must be
verified by executing regular safety measurements.
2.13 Notes on particular risks
DANGER
Risk of fatal injury from suspended loads!
Falling loads can cause serious injuries and even death.
lStand clear of suspended loads and do not step within their
swiveling range.
lNever move loads without supervision.
lDo not leave suspended loads unattended.
lWear suitable protective equipment.
WARNING
Risk of injury from objects falling and being ejected!
Falling and ejected objects during operation can lead to serious
injury or death.
lTake appropriate protective measures to secure the danger
zone.
WARNING
Risk of injury due to unexpected movements!
If the power supply is switched on or residual energy remains in
the system, components can move unexpectedly and cause
serious injuries.
lBefore starting any work on the product: Switch off the power
supply and secure against restarting.
lMake sure, that no residual energy remains in the system.

Basic safety notes
09.00 | SRH-plus | Assembly and Operating Manual | en | 389428 15
WARNING
Risk of injury from sharp edges and corners!
Sharp edges and corners can cause cuts.
lUse suitable protective equipment.
WARNING
Risk of burns through contact with hot surfaces!
Surfaces of components can heat up severely during operation.
Skin contact with hot surfaces causes severe burns to the skin.
lFor all work in the vicinity of hot surfaces, wear safety gloves.
lBefore carrying out any work, make sure that all surfaces
have cooled down to the ambient temperature.
WARNING
Risk of injury from parts coming loose!
If the shock absorbers are faulty, the product can become
damaged. Parts coming loose in this way can lead to injuries.
lRegularly check the components for wear and damage.
WARNING
Risk of injury if the condition or behavior of the product is
undefined!
Cutting off the compressed air supply in an uncontrolled manner
could lead to undefined states and behavior. This may cause
personal injury or material damage.
lThe operator must define suitable emergency stop and
restarting strategies.
ðEmergency stop strategies: e.g. by means of controlled
shut down
ðRestarting strategies: e.g. using pressure build-up valves
or suitable valve switching sequences

Technical data
16 09.00 | SRH-plus | Assembly and Operating Manual | en | 389428
3 Technical data
3.1 Type key
SRH-plus 20 - W - M8 - A
Size
20, 25,
30, 35,
40, 50, 60
Dampening
W = soft
H = hard S = speed
Center bore / Electrical feed-through
CB = center bore
M5 = Electrical feed-through with connector plug M5
M8 = Electrical feed-through with connector plug M8
M12 = Electrical feed-through with connector plug M12
Axial cable outlet
A = axial cable outlet
- = no axial cable outlet
- = for variants with EDF: lateral cable outlet
Type key
3.2 Basic data
Designation Value
Noise emission [dB(A)] ≤70
Pressure medium Compressed air, compressed air
quality according to ISO
8573-1:2010 [7:4:4]
Min. pressure [bar] 3
Max. pressure [bar] 8
Tab.: Basic data swivel unit
Designation Value
Max. voltage [V] 24
Max. current per wire [A] 1
Tab.: Basic data EDF
More technical data is included in the catalog data sheet.
Whichever is the latest version.

Design and description
09.00 | SRH-plus | Assembly and Operating Manual | en | 389428 17
4 Design and description
4.1 Design
Design SRH-plus
1 SRU-plus 6 Sensor query
2 Screw-on bracket with
axial cable outlet
7 Distributor plate for CB
3 Screw-on bracket with
lateral cable outlet
8 Distributor plate for EDF
4 Screw-on bracket for CB 9 Swivel head
5 Sensor query
4.2 Description
The product is a pneumatic swivel unit for fast loading and
unloading tasks, with integrated fluid and electrical feed-
through.
Variant elektrical feed-through (EDF)
With the variant with electrical feedthrough (EDF) sensor signals
for monitoring the product can be reliably transmitted and
discharged via a lateral or axial outlet.
Variant center bore (CB)
With the variant with center bore for example, cables can be
routed through the product..

Assembly
18 09.00 | SRH-plus | Assembly and Operating Manual | en | 389428
5 Assembly
5.1 Installing and connecting
WARNING
Risk of injury due to unexpected movements!
If the power supply is switched on or residual energy remains in
the system, components can move unexpectedly and cause
serious injuries.
lBefore starting any work on the product: Switch off the power
supply and secure against restarting.
lMake sure, that no residual energy remains in the system.
CAUTION
Risk of damage to the product!
If the end position is approached too hard, the product may be
damaged.
lAs a rule, a rotary movement must take place without impact
and bouncing.
lTo do this, carry out sufficient throttle and dampening.
lObserve specifications in the catalog data sheet.
CAUTION
Material damage due to opened exhaust air throttle valves!
If during first actuation the exhaust throttle valves are open, the
product may move in an uncontrolled manner.
lClose the exhaust air throttle valves completely before
applying pressure.
Overview 1. Screw the product to the machine/system, }5.2.1 [/20].
ðUse centering sleeves from the enclosed accessory pack.
ðObserve the tightening torque for the mounting screws.
2. Screw the attachment part to the swivel
head, }5.2.1 [/20].
3. In the main air connections "A" and "B", screw in throttle
valves and connect compressed air lines, }5.2.2 [/22].
ðIn die Hauptluftanschlüsse "A" und "B"
Verschlussschrauben einschrauben, }5.2.2 [/22].
ðIn die Zuluftleitungen für die Luftanschlüsse "a" und "b"
Drosselventile montieren.

Assembly
09.00 | SRH-plus | Assembly and Operating Manual | en | 389428 19
4. Check that all of the throttle valves are closed.
5. Screw in locking screws in open and not required air
connections where appropriate.
6. Adjust the angle of rotation, }5.3.1 [/27].
7. Adjust the swiveling speed, }5.3.2 [/30].
8. Adjust shock absorber stroke, }5.3.3 [/31].
9. Mount the sensor, }5.4 [/33].

Assembly
20 09.00 | SRH-plus | Assembly and Operating Manual | en | 389428
5.2 Connections
5.2.1 Mechanical connection
NOTE
For connection dimensions, see drawings in the catalog.
Connections on the
screw-on bracket
The product can be assembled from two sides.
Centering sleeves for the mounting screws are included in the
accessory kit.
Assembly options
Item Mounting SRH-plus
20 25 30 35 40 50 60
1 Mounting screw
(4Piece)
M6 M6 M6 M6 M8 M10 M10
Max. depth of
engagement from
locating surface
[mm]
7 7 8.5 8.5 12 18 18
2 Centering sleeve
(2Piece)
Ø6 Ø6 Ø6 Ø6 Ø8 Ø10 Ø10
Connections on the
swivel head
Two attachment parts can be mounted on the product.