|DK||With triangular spindle (DK6,5)|
|VDE||With double bit|
|1||Lock housing with round stop|
|2||Lock housing with stop, rectangular with handle|
|3||Lock housing with stop, round with handle|
|Latch distance A|
Some latches of version SW are entirely made of plastic that is classified as self-extinguishing as per UL 94 V-0.
The classification under UL 94 V-0 (Underwriters Laboratories) describes the fire behaviour of plastic. In the test, a plastic test specimen with a certain shape and with certain dimensions is placed vertically and set on fire. For classification V-0, the flame must go out within 10 seconds without generating burning drops.
This involves a simple tool allowing the latching mechanism to be dismantled again.
For installation, set a hole in the door, cover or hatch as shown in the outline drawing.
When assembled, the latch can be inserted through the hole from the front, up to the stop. At the same time, the metal snap-in tabs snap into the surrounding structure on the back side and hold the latch in the hole.
The required installation bore in the door leaf, is usually generated by punching or laser machining in series production.
The installation bore diameter can also be created by drilling or milling as shown in the outline drawings.
For small series and steel sheets below 2 mm thickness, the Sheet Metal Punches GN 123 are alternatively the tool of choice.