Important Notice - Fresmak ARNOLD Serie Manual De Instrucciones

The -TWIN vises are supplied ready for working, and they come packaged in a wooden box.
This box has been designed to be used as a storage case when the vises are not being used.
This vise is supplied with machinable jaws. If you would like hard jaws, don't hesitate to ask for them.
The vises are supplied with the following standard accessories:
• Set of flanges.
• A screw-on valve assembly on the pneumatic cylinder for operating the device.
The personnel in charge of putting this vise into operation must have studied these instructions thoroughly
before starting to use the device.
A. OPERATION
The TWIN-NEUMO HYDRAULIC vises with twin anchors are equipped with a single action pneumatic
cylinder, meaning that it returns using a spring. To work correctly, this vise REQUIRES an external,
pressurised air supply (6 bar). Two pieces to be held down should always be used.

IMPORTANT NOTICE:

The air that is fed to the vise must be correctly filtered and lubricated in order to prevent that
water that it normally contains from entering the cylinder, thereby causing it to rust.
By adjusting the input air pressure, the clamping force to be obtained can be regulated.
In order to introduce air into the cylinder, install the valve assembly on the threaded unit of the pneumatic
cylinder at the rear. This assembly has the following:
- An ON-OFF slide valve to operate the vise screw, thereby allowing air to enter and leave. It is
simple to operate: it only takes two fingers to move the valve forward and back.
- A non-return valve to prevent air from exiting the vise during operation.
- A quick coupling for connecting the air supply hose.
This vise performs two movements: an automatic, approach-return movement and another, high-pressure
anchoring-release movement. The approach-return movement is 3.5 mm in the two hold-down stations.
The working method is the following: by rotating the cylinder either directly by hand or the mobile
jaws are positioned against the piece, and then by turning the cylinder threads back a half turn,
the necessary separation is left for the automatic travel.
B. CLEANING.
Due to the environment in which these vises must work (swarf, cutting fluid, high pressure, etc.), periodic
cleaning at machining centres is fundamental. Normally, simple cleaning is sufficient, for which the
openings existing on the sides of the vise are used.
Complete cleaning should be performed every 1000 working hours. The first thing to do is remove the
side jaws and the central jaw. Then take off the protective sheets and ensure that they are not bent.
Now remove the vise screw assembly and the nuts from the vise. To do so, you must take off the ball
positioner (4625) and then the stay bolt (202). Now, using a strap spanner to hold the pneumatic cylinder
and an open-end spanner to hold the vise screw (4609), turn the cylinder counter-clockwise and separate
it from the vise screw.
Now the four bolts ( 4051) of the flange (4624) can be taken out.
Then you can remove the vise screw assembly and the nuts from the interior body of the vise, and
proceed to clean it. Once removed, the right-hand thread nut (4602) comes off easily. In order to release
the left-hand thread nut (4607), first remove the bushing (4610). To do so, remove the stay bolts (004).
Then, using the open-end spanner previously used for holding the vise screw (4609) and using a hook
spanner, take off the bushing (4610).
It is a very good idea to clean off any swarf that may be on the nuts and to lubricate the assembly well
when it is reassembled.
C. MAINTENANCE OF THE PNEUMATIC VISE SCREW.
This vise screw requires no periodic maintenance. It will only be necessary to replace the seals after a
few years. This is the only case when the vise screw should be disassembled. In all other cases, consult
-TWIN HIGH PRESSURE
PNEUMO-HYDRAULIC VICE
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