Silca Crown D422143XA, Руководство по эксплуатации, Страница: 23 / 29

Operating manual - English CROWN
Copyright Silca 2001 19
H
OW TO DUPLICATE KEYS WITH STEP CUTS
1) measure the diameter on the original key.
2) set up the machine in order to conform to duplicate (lifting or lowering the device the necessary dis-
tance in order to have the same diameter as measured on the original key, and also to have the
same average diameter of the shank.
3) proceed in duplicating the cuts “A” (fig. 14).
4) reset machine in order to make cuts as described in the calculation here below.
5) proceed in duplicating cuts “B”.
Example of calculation:
The original CHICAGO MASTER key has shank diameter of 8,65 mm as shown on the table.
We will have:
8,65 mm - 8,2 = 0,45/2 = 0,225 mm. which is equal to two and quarter revolutions of the screw (G) in a
counter clockwise direction in order to lower the device.
In order to make this particular stem cut we must turn the screw (G) completely in a clockwise direction
until it reaches the end of the stroke.
C
ONTROLS AND
C
OMPARISONS
(among various types of keys)
The picture fig. 15 illustrates the correct way to control the diameter of the original key that is compared
with the data on the table.
If by chance the diameter is either larger or smaller than 8,2 mm (shank diameter - adjust) proceed as
mentioned in points 1-2-3 described on "Height changes" page 18.
Fig. 15
DATA TABLE
MAKE
Key measurements (mm)
A B C D
All
(ACE - ALPHA- L&F - AMERICAN - FORT - GEM ...)
9,50 7,90 8,26 0,81
CENTURY 10,02 7,52 8,36 0,75
CHICAGO 10,16 8,30 8,65 0,95
CHICAGO 9,30 7,60 7,75 0,82
FORT MAS. 9,53 7,20 7,62 1,15
MERONI 9,55 8,05 8,36 0,75
PC (CORTELLEZZI) 9,65 8,00 8,32 0,83
SIDLEEN 9,50 7,50 8,20 1,00
A ( outside ø)
C
(shank ø )
B
(inside ø )
D
(thickness )