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Festo 7DGC-KFa_en
Assembling the linear drive
4.1.2
When assembling a linear drive wearing parts, such as the sealing band, seals, buffers, covers, clips and the complete
piston, can be replaced.
The wearing parts are ordered from the online spare parts catalogue (spareparts.Festo.com) quoting the appropriate part
number (dependent on the size of the linear drive).
The part number is an x-stroke part number. In addition to the part number, you must also specify the stroke of your
linear drive when ordering. The stroke can be determined from the type code on the name plate of the linear drive
(see order example below). Using this information you can calculate the necessary sealing band length.
Cutting the new sealing band to length
The exact length of the sealing band is determined by the 0-stroke of the respective type and the stroke of the linear
drive. The stroke is specified by the type code on the name plate. Check the length of the new sealing band and shorten
it to length (0-hub + hub) as necessary. See order example.
Type
Length L
0
DGC-8-…-KF
140 mm
DGC-12-…-KF
160 mm
Example: DGC-12-405-KF
0-stroke:
160 mm
Stroke:
405 mm
Length of the sealing band = 0- stroke = 565 mm
The length of the sealing band calculated in this way is a theoretical value. Component tolerances may make it necessary
to adjust the length of the sealing band after installation.
Note
Sturdy general purpose scissors or metal shears are best for cutting the sealing band.
Warning
Do not bend the sealing band as this may cause damage or tearing and reduce its service life.
Greasing whilst assembling
When assembling the linear drives, various components have to be greased in accordance with the table below.
Component
Lubricant
Greasing instructions
Cylinder barrel
Festo LUB-KC1
1)
Apply a layer of grease to the slot and all around and along the entire length of
the cylinder bore.
Sealing band
Festo LUB-KC1
1)
Apply a layer of grease all around and along the entire length.
Piston
Festo LUB-KC1
1)
Grease all around.
Seal, piston
Festo LUB-KC1
1)
Grease all around.
1)
See “Assembly aids” in the online spare parts catalogue on the Festo website (www.Festo.com).
Grease the sealing band, the piston and the inside of the cylinder barrel.
•
Observe the greasing instructions in the table at the start of this chapter.
Thread the sealing band into the through-hole in the piston.
•
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