1) The document describes the Wobbel screw SDF2, a stainless steel fastener designed to fix non-metallic cladding panels to thin steel or aluminum. 2) Unlike wing-type screws, the Wobbel screw has an eccentric drill point that wobbles to drill into the steel without breaking or creating a large hole. 3) Key features include the ability to work in thin materials, clamp materials together properly, and provide an easy installation solution for cladding panels with high quality stainless steel.

1. Wobbel screw: SDF2

2. Application: to fix a "non-metallic" cladding
panel on thin steel
Item 1 Item 2
Gipsum
Fibercement
Gipsum-Cement
0.75 - 1.25 mm steel
Calcium-Silicat
or 2.5 mm aluminium
Hardwood
Plastic
Aluminium
Thickness 6 - 12 mm

3. Existing solution: Wing type screw

4. Function of wing screws
The wings enlarge the The wings break when Drill the steel and
hole in the soft material they contact steel thread form into the
steel
+ =
But:
 It only works if the wings are stronger than the first material and
weaker than the steel !
 In thin steel they often do not break off but drill a large hole.

5. Our challenge
 We were looking for a high quality stainless steel fastener that
works in every case
 Can be used in thin steel
 Independent from material density, machine speed etc
 Nice aesthetical head which can be colour matched

6. Our solution: Wobbel screw SDF2

7. Function:

8. Function: it's wobbling around the excentric
drill point

9. Function:

10. Function:

11. Function: the point drills the steel

12. Function:

13. Function: it clamps the two material properly
together

14. Features
 No problems with wings which are breaking too early (hole is not
enlarged) or too late (no pull out load)
 Easy installation of cladding panels
 High quality stainless steel fastener A2, AISI 304
 Suitable for thin materials (0.75 - 1.25mm steel), so the structure
could be made in thinner steel to save money
 Suitable for soft materials (aluminium)
 For hard cladding panels (fibre cement etc)
 Competitive price

15. Status
Easy installation