Festo DGC G Series Einrichtungshandbuch
Repair
instructions (en)
Linear drive
DGC-…-G
7DGC-Ga_en
Imprint
Version:
7DGC-Ga_de (09.2009)
Copyright:
©Festo AG & Co. KG
Postfach
D-73726 Esslingen
Editorial department:
SC-S
Phone:
+49 / 711 / 347-0
Email:
Internet:
http://www.festo.com
The reproduction, distribution and
utilisation of this document as well
as the communication of its contents
to others without expressed authori-
sation is prohibited. Violations will
give rise to damage claims. All rights
reserved, in particular the right to
le patent, utility model or registered
design applications.
All product designations and brand
names used are the property of the
owners and not explicitly identied
as such.
All technical data subject to change
according to technical updates.
3 / 48Festo 07DGC-Ga_en
Foreword
These repair instructions are valid for the linear drives listed on the title page to
the exclusion of any liability claims.
Deviations compared to the descriptions in these repair instructions may arise
depending on the design and/or modication status of the specic linear drive.
The user must check this prior to carrying out the repair and take the deviations
into consideration if necessary.
These repair instructions have been prepared with care.
Festo AG & Co. KG does not, however, accept liability for any errors in these
repair instructions or their consequences. Likewise, no liability is accepted for
direct or consequential damage resulting from incorrect use of the products.
You will nd further information on this in Chapter 7 “Liability/conditions of use”.
The relevant regulations on occupational safety, safety engineering and interfer-
ence suppression as well as the stipulations contained in these repair instruc-
tions must be observed when working on the products.
4 / 48 Festo 07DGC-Ga_en
Table of contents
1 Important information 5
1.1 About these repair instructions 5
1.2 Pictograms used in these repair instructions 5
1.3 General safety instructions 6
2 General product description 6
2.1 Functional description 6
2.2 Types and part numbers 7
2.3 Mounting directions 7
3 Component overview 8
3.1 DGC-8/12-…-G 8
3.2 DGC-18/25-…-G 10
3.3 DGC-32/40-…-G 12
3.4 DGC-50/63-…-G 14
4 Repair steps 16
4.1 Linear drives DGC-8/12-…-G 17
4.1.1 Dismantling the linear drive 17
4.1.2 Assembling the linear drive 18
4.1.3 Replacing the slide elements in the slide 21
4.1.4 Setting the sliding play on the slide 22
4.1.5 Replacing the coupling on the slide 23
4.1.6 Replacing the cushioning components 24
4.2 Linear drives DGC-18/25/32/40-…-G 25
4.2.1 Dismantling the linear drive 25
4.2.2 Assembling the linear drive 27
4.2.3 Dismantling and repairing the piston module 31
4.2.4 Replacing the buffer strips 32
4.2.5 Replacing the sealing rings for the supply ports in the end caps 32
4.3 Linear drives DGC-50/63-…-G 33
4.3.1 Dismantling the linear drive 33
4.3.2 Assembling the linear drive 36
4.3.3 Replacing the slide elements in the slide 41
4.3.4 Replacing the buffer strips 42
4.3.5 Replacing the sealing rings for the supply ports in the end caps 42
5 Maintenance 43
5.1 Greasing the linear drive 43
6 Tools 44
6.1 Required tools by size 44
7 Liability/Conditions of use 44
5 / 48Festo 07DGC-Ga_en
Important information1
About these repair instructions1.1
This document contains important
information about the professional
repair of the linear drive type DGC-…-G.
The DGC-…-G linear drive is fully
repairable. However, in case of larger
defects, the costs of carrying out a
repair must be considered.
Before carrying out a repair, the
relevant chapter in these instructions
must be read in full and followed
consistently.
For reasons of clarity, these repair
instructions do not contain complete,
detailed information. The following
documents should therefore also be
available while doing repair work on
the linear drive:
Operating instructions•
Contains information about the
control parts and connections
for the linear drive, as well as
information about function, con-
struction, application, installation,
commissioning, care and mainten-
ance, etc. It can be found on the
Festo website (www.Festo.com).
Spare parts documentation•
Contains an overview of the spare
and wearing parts as well as infor-
mation on their installation. The
spare parts documentation can
be found in the online spare parts
catalogue on the Festo website
(spareparts.Festo.com).
Assembly tools•
Contains an overview of the
available assembly tools such as
lubricants, thread locking agents,
maintenance tools etc. (aids for
assembly and maintenance). They
can be found in the online spare
parts catalogue on the Festo web-
site (www.Festo.com).
Pictograms used in these repair instructions1.2
Warning
This sign indicates a dangerous situation for persons and/or the product. Failure to observe this warning can result in
injury to persons and/or damage to the device.
Note
This sign indicates important tips and information that can make your work easier.
Environment
This sign indicates information on the steps required for environmentally-friendly use of materials and equipment, as
well as the guidelines and regulations that may need to be observed.
Documents
This sign indicates references to other chapters or documents containing additional information.
6 / 48 Festo 07DGC-Ga_en
General safety instructions1.3
Warning
The linear drive must only be repaired by authorised and trained persons in accordance with the specications in the
technical documentation and using original spare parts.
Installation and repair by unauthorised and untrained persons, repairs using non-original spare parts, as well as with-
out the technical documentation required for installation and/or repair, are dangerous and therefore not permitted.
Repairs must only be carried out in conjunction with these repair instructions as well as the respective device-specic
operating instructions.
Note
Instead of carrying out the repair yourself, your local Festo sales ofce offers the option of having the repair carried
out by Festo.
Environment
Components and equipment replaced as part of a repair must be disposed of in accordance with the locally valid envir-
onmental protection regulations.
General product description2
Functional description2.1
The DGC-…-G is the basic version of the DGC linear drive family. It is a linear drive with the functional principle of a
double-acting piston for power transmission. When compressed air is applied to the ports alternately, the piston moves
backwards and forwards in the piston chamber. A rigid connection moves the slide with the attached load (e.g. adapter
plate with drive) on the guide rail. The slot in the cylinder barrel required for this is covered by a band system. The slide is
mounted on slide elements and thus only designed for low-level loads. The operating behaviour in case of torsional loads
is in the medium range.
The DGC-…-G, when used properly, is used for transporting loads in a space-saving manner and is approved for the
operating modes slide mode and yoke mode (adhere to the load limits).
These graphics provide you with an overview of the construction of the linear drive using the DGC-25-…-G as an example.
3
2
5
3
6
21
4
7
8
9
4
8
1Guide rail
2Slide
3Slide-piston connection
4Cover band
5Slide element
6Coupling
7Piston
8Cylinder barrel
9Sealing band
7 / 48Festo 07DGC-Ga_en
Types and part numbers2.2
Type Part number
DGC-8-…-G 530906
DGC-12-…-G 530907
DGC-18-…-G 532446
DGC-25-…-G 532447
DGC-32-…-G 532448
DGC-40-…-G 532449
DGC-50-…-G 532450
DGC-63-…-G 532451
The complete overview of features, accessories,
type codes, technical data and dimensions for the DGC-…
linear drives can be found in the product catalogue or on
the Festo website (www.Festo.com).
Mounting directions2.3
This graphic provides you with an overview of the mounting directions of the linear drive using the DGC-25-…-G as an
example.
DGC-25-
330-G-
PPV-A
123456
W708
Type = Product designation
(name plate)
O = Top
U = Underneath
R = Right
L = Left
V = Front
H = Rear
9 / 48Festo 07DGC-Ga_en
Entry Designation Type Note
DGC-8-…-G DGC-12-…-G DGC-8-…-G DGC-12-…-G
1 Threaded pin or blanking
plug, depending on series
status
Tightening torque 5.0 Nm,
use LOCTITE 222
Tightening torque 5.0 Nm,
use LOCTITE 222
2 Sealing ring
3 Self-tapping screw TPD-WN122-
M3×18-450
M5×20-10.9
Tightening torque 2.0 Nm ± 20%,
use LOCTITE 243
Tightening torque 3.0 Nm ± 20%,
use LOCTITE 243
4 End cap, left
5 Elastic cushioning element Tightening torque 2.0 Nm ± 20%
6 Shock absorber Tightening torque 2.0 Nm ± 20%
7 Shock absorber Tightening torque 2.0 Nm ± 20%
8 O-ring 3×1-N-
NBR75
3×2-N-
NBR70
9 Clip
10 Buffer
11 Buffer/piston seal
12 Cylinder barrel
13 Piston
14 Piston module
15 Wiper seal
16 Slide element
17 Slide element
18 Coupling
19 Stop
20 Screw M2×7.5-8.8
internal Torx T6
Tightening torque 0.3 Nm, use LOCTITE 243
21 Slide
22 Socket head screw DIN 912-
M3×8-8.8
DIN 912-
M4×8-8.8
Tightening torque 1.4 Nm, use LOCTITE 243
Sealed with thread locker 397332
23 Sealing band
24 End cap, right
10 / 48 Festo 07DGC-Ga_en
DGC-18/25-…-G3.2
This diagram is intended only to provide an overview of the individual components. To order spare and wearing parts, please use the
online spare parts catalogue on the Festo website (spareparts.Festo.com).
1
2
3
4
5
6
789
10
11 12 13
14
15
16
17 18
19
20
21
13
13
13
10
4
5
6
8911 12
2
1
22
23
24 25 26
28
27
22
29
30
31
32
31
32
30
3
DGC-18-...-G
DGC-18-...-G
DGC-25-...-G
DGC-25-...-G
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