Fresmak ARNOLD Manual De Instrucciones página 7

MAT HIGH PRESSURE MECHANICAL VICE
A.- Operation of the vice.
The Mat high power vice is operated by turning the handle clockwise. It is supplied with a high power
mechanical spindle.
Turn the handle until the movable jaw reaches the work-piece. When the jaw touches the work-piece,
continue turning the handle. A slight "threshold" pressure will be experienced as the clutch operates and the
high pressure clamping takes place as the handle is turned further. Once the movement comes to a stop,
do not continue turning the handle as it could damage the vice.
To unclamp the work-piece move the handle anti-clockwise.
The high pressure mechanical spindle is a compact assembly and if necessary, easy for exchanging.
B.- Cleaning.
Because of the industrial working conditions on machines and in machining centres in which the vices must
work (swarf, pressure, coolants, etc.), full cleaning of the operational area of the vices must be assessed as
required by the workshop management.
To avoid interference from swarf, the spindle is protected by a metal spiral in the front and metal plates in
the back.
For complete cleaning, take off the moveable jaw and remove the 4 screws of the end clamp(handle end).
The spindle is loose and it can be taken out together with the spindle shoe. Now the vice is free for cleaning.
Oil the parts and carefully replace the parts in the reverse order. Open and close the vice a few times to
ensure it is free, before clamping work-pieces.
For good maintenance, please use good quality coolants and anti-oxidizing agents.
The high pressure spindle does not need any maintenance but it is recommended that the clutch assembly
should be occasionally lubricated. Without removing the spindle from the vice, carefully turn the screw (Nº 4)
(on size 090 it is 15) into the spindle sleeve (Nº 9). In this way, the spindle sleeve is withdrawn backwards.
The torque rod (Nº 6) is then visible and can be cleaned of swarf and lubricated. The spindle sleeve (Nº 9)
can now be repositioned.
C.- Maintenance of high pressure mechanical spindle.
Should clamping pressure decrease in time, it should de dismantled and cleaned.
1. Dismantle as shown in "B" above until the spindle is detached.
2. Remove the spindle sleeve from the assembly, turn the allen set screw (Nº 4) (on size 090 it is 15) and
take off the spindle sleeve (Nº 9).
3. Remove the mounting plate, having previously loosened the safety ring (Nº 12) and the spindle, removing
washer (Nº 6) and the 4 springs (Nº 22).
4. Holding the assembly by the cylinder (Nº 8) unscrew screw (Nº 24) and cap (Nº 12), in this way the
belleville springs (Nº 22) are visible and the threaded spindle (Nº 11) and Secondary plate (Nº 30.9) will
be loose.
5. Remove the 4 rollers (Nos. 30.4 & 30.5) with pincers and with a small sharp stroke take out the primary
plate (Nº 30.1) and the retaining plates (Nº 30.3). With the primary plate (Nº 30.1) the wedge (Nº 30.2)
and roller (Nº 29) will also come out.
6. Disassemble the clutch assembly introducing until the end the 3 dowel pins of cylinder (Nº8). Pulling out
the torque rod (Nº 6) head remove the whole assembly.
7. For loosening all the parts, fi rst remove the pressure plate (Nº 5) (pressure introduced at the end of
torque rod Nº 6) and after the safety ring (Nº 14). Now all the the clutch assembly parts are free.
8. Clean all the parts and, if there is any defective part, replace it. Take care to lubricate the inside of the
assembly.
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