BOT/MBIO/ZOOL 5364

 

The LKB KNIFEMAKER 7800B

 

The illustrated parts and operation of the LKB Knifemaker.  This is the second part of “Making Knives with the LKB Knifemaker” at URL:  http://bomi.ou.edu/bmz5364/making-knives.html

 

 

Figure 1.  Legend to the parts of the knifemaker.

1. Fork used to remove the glass knives from the apparatus

2. Locking lever

3. Shaft

4. Adjusting sleeve for (8)

5. Bracket

6. Set screw for  (4)

7. Cover screw for (6)

8. Clamping head

9. Locking screw for  (28)

10. Support studs

11.  Locking screw for (12)

12.  Rear dial

13.  Score selector

14.  Cover plate   

14a. Dot (marking 200 mm

15.   S= shaft with cutter wheel

16.  Support plate for glass strip

17.  Locking knob for (21)

18.  Breaking knob

19.   Operation Instructions

20.  Angle setting plate

21.  Guide plate

22.  Front glass holder

22a.  Guiding rings

23.  Locking screw for (22)

23a.  DPA-lever (lever for Damping Pressure Adjustment)

23b.  Damping pad

24.  Locking screw for (25)

25.  Front dial

26.  Breaking pins

27.  Centre line

28.  Rear glass holder

29.  Arresting stud for 25 mm glass strips width 29a.  Arresting stud for 38 mm glass strips width

30.  Foundation block (silumingamma)

31.  Disengage knob

32.  Cutter wheel holder (see fig. 8).

33.  Screw for adjusting scoring pressure

34.  Cutter wheel (sintered tungsten carbide

35.  Shaft for cutter

36.  Locking pin 8. Clamping head strip length)

37.  Bracket for (32)

38.  Guide for (15)

39.  Allen wrench for adjusting scoring pressure

40.  Screws for (20)

 

 

 

 

 

Figure 2.  This shows the action of the locking arm holding the glass in place.  This should be supported evenly as the head rests on the glass.  Then the head should be tighted at the pivot arm (3).  When the arm is raised, it should be supported as it is raised, so that it does not fall onto the glass.

 

 

 

 

 

 

 

 

 

 

Figure 3.  The breaking of the glass square into two knives.  Alignment of the positioning of the glass square is critical to forming a good knife.  Positioning of the square is critical to making useful knives.  If the knifemaker repeatedly makes inadequate knives, contact NML personnel.  (OnlyNML personnel will make these adjustments as these settings are critical to everyone.)

 

 

 

 

 

 

 

 

 

 

 

Figure 4.  The glass strip abuts the first pedestal (29).  Glass should be squarely placed into the holder to make an exactly 90˚ break, thus forming a perfect square.  The square is then placed between the front (22) and rear (28) glass holders and tightened into position using knob 31.

 

 

 

 

 

Figure 5.  These are the resulting two knives—one of which should be an inverted mirror image of the first.  At one end of the triangle, there is a 90˚ glass step, whereas on the other side, there is a sharp edge created by two free breaks that occur at approximately at 52˚ angle (α).  Placement of the stress lines and occurrence of defects should influence your knife selection.