Maintenance accessories
Designation Part number1) Type1)
DLGFKF20/25
Oil gun 8041022 AZTPSL
Metering needle kit 8075522 AZTNDSG
Metering needle for DLGF20: Green,
angled 45°
Metering needle for DLGF25: Olive,
angled 45°
Cartridge 8073523 AZLGH1C10,
(Elkalub VP 922, ChemieTechnik Co.,
Vöhringen)
DLGFKF32/40
Grease gun with needlepointed
nozzle
647958 LUB1
Lubrication adapter, angled output 8073388 LUB1TRW
Lubricating grease 8073786 ELKALUB VP 922,
(ChemieTechnik, Vöhringen)
1) Spare parts catalogue ➔www.festo.com/spareparts
Tab. 5
11 Malfunctions
11.1 Fault clearance
Fault description Cause Remedy
Irregular movement of slide Oneway flow control valve not
installed correctly
Choke with exhaust air as far as
possible (not with supply air).
Malfunctions in position sens
ing
Ferritic parts in the vicinity of
the proximity switch
Use parts of nonmagnetic
materials or maintain minimum
distances
è7.4 Mounting accessories.
Linear actuator integrated in a
distorted manner
Fasten the linear actuator to a
flat base.
Seal worn Replace wearing parts:
– Self repair with a set of
wearing parts
– Repair at Festo
Heavy leakage
Sealing band pressed/sucked
in
For unpressurized linear drive:
– Loosen the tubing connec
tion and move the slide
twice by hand through the
entire stroke (if necessary,
move fixed stops into the
end position).
– Avoid low pressure in the
piston chamber (e.g. only
move the depressurised
slide slowly).
Lack of air volume – Increase connection cross
section.
– Place volume upstream.
Linear actuator does not
achieve the desired speed.
High friction or counteracting
force
Observe limit values.
Tab. 6
11.2 Repair
Send product to the Festo repair service for repair.
12 Recycling
ENVIRONMENT!
Dispose of the packaging and product according to the valid provisions of envir
onmentally sound recycling èwww.festo.com/sp.
13 Technical data
Size 20 25 32 40
Design Rodless drive
Mode of operation Doubleacting
Cushioning Pneumatic cushioning,
Selfadjusting on both sides
Pneumatic connection M5 G1/8 G1/8 G1/4
Speed [m/s] 0.07…1.5
Repetition accuracy [mm] ±0.05
Mounting position Optional
Operating pressure [bar] 2…8 1.5…8
Operating medium Compressed air acc. to ISO 85731:2010 [7::]
Size 20 25 32 40
Notes on the operating/pilot
medium
Lubricated operation possible (in which case lubricated
operation will always be required)
Ambient temperature [°C] 0…60
Theoretical force at 6 bar [N] 188 295 483 754
Weight DLGF‑G
Basic weight with 0mm
stroke
[g] 590 957 1703 3234
Additional weight per 10mm
stroke
[g] 28.2 35.3 54.7 80.6
Weight DLGF‑KF
Basic weight with 0mm
stroke
[g] 1015 1640 2829 5585
Additional weight per 10mm
stroke
[g] 35.5 45.5 69.4 105.5
Materials
Cover, housing, rotor/slide Aluminium
Seals NBR, TPEU (PU)
Guide band, guide (DLGF‑KF),
scraper
POM
Sleeve, stop Steel
Tab. 7
Size 20 25 32 40
Loading characteristics, DLGF‑G
Formula for combined loads:
Permitted forces and torques, DLGF‑G
+Fzmax [N] 54 95 138 456
Fzmax [N] 98 164 276 662
Mxmax [Nm] 0.6 1.1 1.8 7.7
Mymax [Nm] 2.2 4.5 7.6 37.6
Mzmax [Nm] 0.7 1.4 2.9 11.2
Characteristic load values, DLGF‑KF
Formula for combined loads (load comparison factor):
Permitted forces and torques, DLGFKF
Fymax [N] 600 1000 1300 1700
+Fzmax [N] 400 700 950 1150
Fzmax [N] 700 1200 1600 2000
Mxmax [Nm] 5.4 12.3 30 54
Mymax [Nm] 15 30 50 90
Mzmax [Nm] 15 30 50 90
Tab. 8