-23-
4.2.5
Safety locks of the router
Danger
Lock the top (2) and bottom (3) router stops (Fig. 4) so that these cannot be moved
by vibrations or an inadvertent release of the height locking device. The cutter may
not touch the guide ring.
5
Dimensioning of joints
5.1
Height of pin/pin socket
Depending on the cross section of the timbers to be joined, the Arunda jigs can be used to create pins and pin
sockets with different heights.
5.2
Dimensioning of pin/pin socket
A dovetail joint (pin and pin socket) is dimensioned in accordance with the height of
the timbers to be joined.
Example joist/main girder:
A base of at least 1/6 to 2/6 of the height of the main girder must be determined. The base "a" (Fig. 1 and
16) is the section between the baseline of the pin socket and the lower edge of the timber.
Danger
For safety reasons, a base (a) of at least 1/6 of the height of the main girder
must always be given, it must never be smaller!
The control rule is: Pin height x 1.2 = minimum height main girder (hmaing min = 1.2 h pin).
Example 1
Height joist/main girder 180 mm
(Base 1/6 to 2/6 height main girder 180 mm)
minimum height 1/6: 30 mm = pin 150 mm
Base: 40 mm = pin 140 mm
Base: 50 mm = pin 130 mm
Base 2/6: 60 mm = pin 120 mm
Example 2
Height joist 180 mm / main girder 220 mm
(Base 1/6 to 2/6 height main girder 220 mm)
minimum height 1/6: (36.6 mm) rounded
upwards =: 40 mm = pin 180 mm
Base: 50 mm = pin 170 mm
Base: 60 mm = pin 160 mm
Base ~2/6: 70 mm = pin 150 mm
Fig. 16
1
a = height of base / t = height of pin
