SCHURTER GmbH
D – 79346 Endingen
www.schurter.com
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2 of 7 29.09.2005 Birmelin 17.01.07 Birmelin 9353 105.9511 c
Print date: 17.01.07 14:27
1 PRODUCT DESCRIPTION
The advantage of the switches with snap-in mounting is that the switches can be assembled from the
front side of the equipment without additional fastening from the rear side. Due to this method of
mounting, the metal switches can be used in applications with limited assembly space or where the
access to the rear side of the housing is not possible. This means that the switches can adapt where
conventional switches will not be applied.
Furthermore, this type of mounting realizes cost savings by a significant reduction of assembly time.
The assembly becomes effective by the force fitting of the switch into the drilling hole, whereas the O-
Ring will be displaced. After inserting the switch through the drilling hole, the O-Ring expands and the
switch is fixed in the drilling hole. It must be pointed out that the panel cut-out is without flash and the
set-up of the drilling diameter has to lie in a minimum range of tolerance (+ 0.15 mm to the nominal
drilling diameter), so that a protective position of the switch can be guaranteed. Also the thickness of
the front panel is important as the position of the switch is determined by the panel thickness. By
using sharp objects the switch can be released from the front panel. Therefore, switches with such an
assembling technique are only suitable to a minimum extent in applications which are exposed to
vandalism.
2 DATA AND DIMENSIONAL DRAWINGS
2.1 Technical Data
The technical data for the assembling of the snap-in switches is listed in this section. The mechanical,
electrical and climatical features of the used switches are described in their particular product
manuals.
Mounting Diameter [mm] 19, 22, 24, 27, 30
Standard Front Panel
Thickness [mm]
1.5; 2.0; 2.5; 3.0
Assembly Force [N] 50 - 100
Drilling Tolerance [mm] max. + 0.15
Panel cut-out without flash
Torsion Protection without Torsion Protection
If the switch is assembled in right direction,
lettered switches can be used.
ESD-Protection In combination with a coated or anodised surface of the front
panel the ESD protection cannot be guaranteed.
