Craftsman: Wil Strijbos
Designer: Wil Strijbos
The weekend was hectic, so I didn’t have the time to sit down with my puzzles.
So in the meantime, here comes a small post about my second bolt from Wil.
As far as I understand this is Trick de Luxe II crafted and designed by Wil Strijbos.
If this is wrong in any way or you have more information about Wil’s bolts ie. how to tell them apart, please leave a comment.
It’s very similar to “Trick de Luxe I” with a few exceptions:
This one has a ring around the head of the bolt & the pin that goes (through?) the nut is not hollow.
The head on this bolt has the following written on it: ╘╒ 8.8 any explanation to what these markings means are appreciated.
This is also a behemoth of a bolt… 8cm (3.15 inches) in length. Are all of Wil’s bolts made for caterpillars?
Update: I got a great explanation from Rudolf O. Roffel regarding the numbers on the bolts
These numbers refer to the strenght of the steel of which the bolt is made.
The range is 3.6, 4.6, 5.6, 5.8, 6.8, 8.8, 10.9 and 12.9 of which the last one is the strongest.
The number before the . is 1% of the bracking strenght in Newton per square mm of material.
The other number behind the . refers to the correspondence of the first number and the point of wich the bolt starts to disform before braking.
12.9 is a rare and expensive one, 3.6 bolts are made from the leftovers of the mill.
It might be that Wil has used these numbers in his puzzle, but these bolts and nuts are always marked with these numbers, expets for the very cheap ones, wich are made from the leftovers from the leftovers