Umach U-D31

Features：

1. Easy to operate and labor-saving, it can easily punch holes for texts of any thickness below 30mm;
2. Imported drilling knife, sharp edge, neat cutting edge, and through 20,000 drilling tests;
3. the unique ruler design, can be easily positioned to punch two holes, three holes.

Machine operation instructions：

1. Adjust the margin: adjust the adjusting screw and ruler, and adjust the margin to the appropriate position.
2. Punching: place the documents in the required binding position on the platform and press the handle down to punch holes.
(note: the document should be typed through, do not put your hand under the perforating knife)
3. Scrap paper: take off the carton, discard the scrap paper and load it.

Replacement of accessories:

1. Change the knife pad
Pry the knife pad out of the slot with a point.

Install the new knife pad and check whether it is placed smoothly and properly.

2. Change the punching knife

Loosen the screw of the shield and take off the shield.
With a hex wrench to loosen the screw, remove the punch knife.
Install the new knife, and tighten the screws, the operation is completed.

Matters needing attention：

1. Check whether there is a half-moon shaped piece of paper in the scrap of paper, and avoid any shape that is not round.
If there are non-circular paper scraps when drilling holes, the reasons may be as follows:
(1)   When drilling, the documents are not put in order, there is a situation of missing orders;
(2) punching work in the middle of the paper line;
(3) punch holes in the binding or half finished work on the surface;
(4) punch holes too close to the folded paper stitching line.

2. During the drilling process, do not put your hand under the punching knife to avoid accidents.