Technical data

Diameter/mm:

3 / 4 mm (only plain/smooth), contact us for more information.
7,8 / 7,9 / 8 / 9  / 9,5  / 9,6  / 9,8 / 9,9 / 10 / 11,7 / 11,8 / 11,9 / 12 / 12,8 / 12,9 / 13 / 14 / 15 / 16.

Length/mm:

From (18) 20 mm – 600 mm with 1 mm interval.
Standard lengths are 20 / 25 / 30 / 35 / 40 / 45 / 50 / 60.

Tolerances:

Diameter: +/-0,1 mm
Length: +/- 0,5 mm
Humidity: 7-9 %

Wood & quality:

The SPIRAL beech wood dowel pins are sorted on our vision system.
Firstly, the wood with knots or wood where year ringdirection crosses the length of the dowel is removed.
Subsequently, the dowels are shortened and compressed.
In this process the wood is subjected to a pressure which means that if there are any vulnerabilities in the wood it will simply burst.

This ensures that only the best wood is delivered to our customers as dowel pins.

Our vision system subsequently ensures that all the dowel pins meet the tolerances we promise.
The vision system checks the chamfer, the length and the diameter.
6 cameras capture each 3-4 frames per millimeter, i.e. the diameter of a dowel pin in 30 mm length is measured approximately 90 times on each camera, or is measured about 540 times in total.
Beside this, the chamfer is also controlled in the vision system to ensure that it is consistent. If the chamfer does not live up to the demands that we have, the dowel pin will be rejected even if the diameter and the length are correct.