Based on the application material and the screw property class, minimum length of the HONSEL Coils can be advised.
Nominal length determination
| Application material strength | Nominal length for thread inserts l1 property class of the fastener | |||||
|---|---|---|---|---|---|---|
| Rm N/mm2 | 4,8 | 5,8 | 8,8 | 10,9 | 12,9 | 14,9 |
| bis 100 | 1,5 d | 2,0 d | 3,0 d | - | - | - |
| > 100 - 150 | 1,5 d | 2,0 d | 2,5 d | 2,5 d | 2,5 d | 3,0 d |
| > 150 - 200 | 1,5 d | 1,5 d | 2,0 d | 2,0 d | 2,5 d | 3,5 d |
| > 200 - 250 | 1,0 d | 1,5 d | 1,5 d | 1,5 d | 2,0 d | 2,5 d |
| > 250 - 300 | 1,0 d | 1,0 d | 1,5 d | 1,5 d | 2,0 d | 2,0 d |
| > 300 - 350 | 1,0 d | 1,0 d | 1,0 d | 1,5 d | 1,5 d | 2,0 d |
| > 350 - 400 | 1,0 d | 1,0 d | 1,0 d | 1,5 d | 1,5 d | 1,5 d |
| > 400 | 1,0 d | 1,0 d | 1,0 d | 1,5 d | 1,5 d | 1,5 d |
Minimum wall thickness
Based on the major diameter of the HONSEL Coils receiving thread.
The minimum wall thickness is determined by the strength of the application material, the receiving thread major diameter, as well as the HONSEL Coils length. The following formulas apply to HONSEL Coils with length of 1.5d installed into aluminum and general castings and wrought alloys
d = nominal diameter
DEG = receiving thread major diameter
s = residual wall thickness
B = Min. material width
Metric ISO standard and fine thread
The length of the thread inserts can only be measured when installed. For uninstalled thread inserts the measurable features are d1 and W
Receiving thread according to DIN 8140-2
d = nominal thread diameter
d1 = major diameter of the HONSEL Coil before installation
d2 = receiving thread drill diameter (guide value) must be adjusted depending on the application and material
l1 = nominal length of the HONSEL Coil before installation (cannot be measured in the delivered condition)
l2 = length of HONSEL Coil when installed (l2= l1 - P)
l3 = minimum depth of core hole according to DIN 76 Teil 1
l4 = Minimum length of receiving thread for blind holes or minimum part thickness for thru holes (l4 = l1 = l2 + P)
l5 = distance between the HONSEL Coil and mating surface (l5 = 0,25P to 0,75P) with l4 defined as above.
l6 = maximum screw-in depth when installation tab is not removed (l6 = l2 + l5 max.)
W = number of rotations to reach full installation (the number of turns may deviate by -0.25P)
P = thread pitch
DEG = major diameter of receiving thread
D1 EG = minor diameter of receiving thread
Please note
- D1 EG determines drill selection
- If a countersink cannot be avoided, then create and debur the countersunk at 90°. Countersink outer diameter = DEG + 0,1 mm.
- If the HONSELCoil Plus thread inserts are used in automation, we recommend to add at least 1 x l3 und l4 each.
All dimensions in mm. Technical changes reserved.