Fresmak, S. A.

The vices are identified according to the width of the jaws in four main groups:

1. ARNOLD MAT 90: do not have a regulator, as the pressure obtained is lower than the larger vices.
2. ARNOLD MAT 125: the regulator has 6 positions called 0, 1, 2, 3, 4 and 5.
3. ARNOLD MAT 160: the regulator has 7 positions called 0, 1, 2, 3, 4, 5 and 6.
4. ARNOLD MAT 200: the 200 vice has the same regulator as the 160 vice.

To operate the regulator we need to use 2 spindle parts:

If we look down above the cylinder and follow clockwise, the letter 0 followed by the other numbers. The letter 0 may not always be in line with the indicator or origin (there is a certain amount of play in either direction) and it is important to make it coincide before operating the regulator.

There are three operating options:

1. Clamp operation with pre-setting without high pressure
2. Clamp operation with pre-setting and high pressure
3. Clamp operation without pre-setting and with high pressure

Clamp operation with pre-setting without high pressure

• This option is valid when the part is very, very soft and high pressure is not required. With this option, the clutch is not used, so we should not be surprised when we don’t hear the ‘clicking’ sound.
• The dial must be positioned on 0 indicator. By turning the handle we move the jaw against the work-piece and, without using the hammer, we turn the handle a further 90º.
• The part will now be clamped with an approx. 500 kg pressure. Clamping and unclamping must be done solely with the ARNOLD handle provided with the vice.

Clamp operation with pre-setting and high pressure

• This option is suitable for clamping parts with irregular surfaces, swarth, chippings, uneven castings or soft parts to be milled with deep cuts. This operation achieves a more efficient clamp by reducing tolerances with the pre-setting and creating greater clamping pressure. This method is similar in procedure to option 1.
• Once the pre-setting is done, the dial must be turned anti-clockwise and the required letter located on the indicator.
• The handle must now be turned clockwise. The clutch mechanism will then be activated and, as the handle is turned, the clamping process will continue until there is a definite stop, which indicates that the desired pressure has been reached. No extra pressure must be applied on the handle: this could cause internal breakage.
• Once the machining operation has finished, the handle must be turned anticlockwise to release the pressure and disconnect the clutch. An additional effort in turning will be needed to free the pre-setting initially carried out. We can now remove the work-piece.

Clamp operation without pre-setting and with high pressure

When parts do not need pre-setting, the letters must be turned on the indicator anticlockwise to coincide with the pressure required. The handle is then turned clockwise, the jaw will come into contact with the work-piece and then the clutch (with a certain resistance) will be activated. The clamping pressure is achieved when the handle comes to a definite stop. The handle must not be forced at this point. Once the machining operation has finished, the clamping is released by turning the handle anti-clockwise; the clutch will be freed and the jaw will move with the main spindle.

General Information

• The 160 spindle has 6 numers, number 6 coincides with the letter 0, but rotated 360º.
• The 0 position does not coincide exactly with the indicator.
• It must be adjusted manually.
• To locate the desired clamping pressure the cylinder cap (ref.920360125/920360160) must be turned anticlockwise.
• The 0 position indicates no clutch activity/no high pressure.
• The spindle must be turned ONLY with the standard ARNOLD vice handle; hammers and extensions, etc, will damage the vice.