Radial grippers HGRT
Festo SE
&
Co.
KG
Postfach
D-73726 Esslingen
++49/711/347-0
www.festo.com
(en) Operating instructions
754149
1007NH
Original: de
Warning
During commissioning and operation:
Moving masses can cause injury to people (crushing) or damage to property.
• Make sure that, in the gripping area,
– no one can place their hands between the gripper fingers,
– there are no objects in the gripping area (e.g. by means of a protective screen)
Before venting (without gripping force backup):
• Make sure that the gripper is not holding an effective load.
In this way you can prevent a mass from falling down suddenly.
When dismantling the piston for the HGRT-...-G2 :
High spring forces throw the piston outwards
(danger of injury,
Fig. 10).
• Ensure that the piston is preloaded to 800 N.
Note
Installation and commissioning are to be carried out only by qualified personnel
in accordance with the operating instructions.
1
2
3
4
5
7
8
6
Fig. 1 Control sections and connections
1
Function and application
When the compressed air connections
5
and
6
are pressurised alternately, an
internal piston is moved backwards and forwards. A mechanism transfers the
movement of the piston to the gripper jaws
1
, to which gripper fingers are
fastened.
The opening and closing action of the gripper fingers enables them to grasp wor-
king loads by their outer or inner contour (double-acting). The HGRT-...-G2 with the
integrated spring return can also be used in a single-acting manner and for gripping
force backup. If the gripper is exhausted, this spring returns the gripper jaws and
pistons to their initial positions: gripper fingers closed.
The radial gripper HGRT is intended for gripping and holding effective loads.
2
Requirements for product use
• Compare the maximum values specified in these operating instructions with
your actual application (e.g. pressures, forces, torques, temperatures, masses,
speeds). Only compliance with the load limits allows operation of the product in
compliance with the relevant safety regulations.
• Take into consideration the ambient conditions at the location of use.
Corrosive elements in the environment (e.g. ozone) will reduce the service life
of the product.
• Ensure that the compressed air is properly prepared (
11 Technical data).
• Maintain the selected medium for the complete service life of the product.
Example: Always use unlubricated compressed air.
• Pressurize the total system slowly. This will prevent uncontrolled movements
from occurring. For slow start-up pressurisation, use on-off valve HEL.
• Comply with the regulations of the trade association, the German Technical
Control Board or relevant national regulations.
• Remove all transport packaging such as foils, caps and cartons (except for any
plugs in the pneumatic connections).
The packing is intended for recycling (except for: oiled paper = other waste).
• Use the product in its original condition without any unauthorised
modifications.
• Note the warnings and instructions on the product and in the relevant operating
instructions.
• Take the tolerance of the tightening torques into account.
Unless otherwise specified, the tolerance is ±20 %.
• Take the product’s weight into account. It weights up to 3.5 kg.
3
Mechanical installation
Note
Fig. 2
Excessive tightening torques during
mounting will damage the gripper
mechanism.
• Make sure that the maximum
permissible tightening torques are
not exceeded.
• Observe the maximum
permissible values for the
following characteristics
(
11 Technical Data):
– Force Fz
– Torques My and Mz
Mounting the gripper fingers
1. Position the gripper fingers with the
centring sleeves on the fitting hole
8
of the gripper jaw.
2. Fasten the gripper fingers with two
mounting screws each to the
threaded holes
7
.
Refer to the following table for the
characteristics.
Fig. 3
8
7
HGRT-...
16
20
25
32
40
50
Fitting dia. centring sleeve [H8]
8
[mm]
5
7
9
9
12
15
Screw
7
M3
M5
M6
M6
M8
M10
Tightening torque
7
[Nm]
1.2
6
10
10
24
47
Fig. 4
If proximity sensors are used:
• observe the following points:
– Interference caused by ferritic mounting parts (e.g. by mounting screws made
of ferritic steel)
– Possibly protruding proximity sensors.
When sensing both piston end positions:
• Push both proximity switches into separate slots
4
.
• Make sure there is sufficient room for the connection elements.
Fitting the gripper:
• Fasten the HGRT as follows:
1. Press two centring sleeves
9
into
the fitting holes.
2. Place the gripper with the
centring sleeves on the connecting
surface
aJ
.
3. Fasten with two screws
aA
/
aB
.
Refer to the following table for the
characteristics:
Fig. 5
9
aJ
aB
aA
