Review the FAQ’s to see if your concern has been answered.  Click on the question to expand the answer. If you don’t find your question here please see our support page.

Can I use INVIS with plastic materials?

INVIS can be used in all non magnetic materials. In very hard and/or brittle materials (e.g. acrylic glass) we recommend to:

  • pre-cut the thread of the joiner (thread cutter 8 mm, Art.-No. 6108061 / Thread cutter 12 mm, Art.-No.: 6112061)
  • widen the pre-drilling for the stud up to 6.2 mm, depending on the material in use. With this the inserting torque of the stud can be kept within a reasonable range.

Can the magnetic fields of INVIS cause problems?

No adverse effects of the small permanent magnets in the INVIS joining elements have been reported.  These magnets are active only in the very immediate surrounding of the joiner; the magnet field weakens rapidly with increasing distance to the joiner.  Already at a distance of ca. 3 cm, the magnet is almost undetected.

Care must be taken, however, when operating the actuator.  This device generates a strong, rotating magnet field and must be kept away from magnetic data storage media.  If you wear a pace-maker, please refer to the owner’s manual.

How big can the distance between actuator and the joiner be?

The distance between actuator and the center of the joiner must not exceed 20 mm!

With increasing distance between joiner and actuator, we recommend to chose a slower speed on the actuator (intense knocking sound of the joiner = best possible RPM).

How thick must work-pieces be for the use of INVIS

8 mm joiners are for work-pieces as of 13 and 12 mm joiners for work-pieces as of 19 mm thickness. In the interest of the highest possible tightening force, we recommend to always use the biggest possible type of joiners.

The smaller the distance between the INVIS actuator and the joiner, the higher is the resulting tightening force.
Remark: When working in thickness above 40 mm, the maximum distance of 20 mm between centre of the joiner and the surface of the work-piece must be observed!

How to insert joiners and studs correctly?

To assure correct insertion in a right angle, the inserting gauge must be used.
Remark: The wood is being pushed aside when the joiner is inserted. When using thin materials, splitting of the work piece can be avoided by giving counter-pressure with the help of clamps.

When processing hard materials, we recommend the use of a non-fat gliding agent, such as bee-wax in order to minimize inserting torque. (See also „Use of INVIS in hard plastic materials“ above)

What do I do if the actuator does not work, i.e. I do not hear the knocking sound?

Make sure the battery is charged.

Check whether or not the maximum distance between actuator and joiner has been observed.

Check the correct position of the actuator relative to the joining element; they must be aligned in a parallel way.

Please be aware that the knocking sound only appears once the screw of the joiner is fully turned into the opposite piece (usually after 3 – 5 seconds).

If the fault persists, please contact your nearest INVIS outlet.

What do I need to observe when I use the actuator?

In order to operate the joiner, the actuator must be positioned parallel to the joiner.
Remark: Check the direction of rotation on a separate joining element – adjust the direction on the actuator by choosing the position of the switch.
Fastening the joiner:
Move the actuator slightly side wards during the fastening process in order to obtain best possible impact on the joiner. A clicking sound indicates that the joiner is fastened.
Duration of the fastening:

The clicking sound of the impact wrench mechanism of INVIS will indicate the end of the fastening process (after approx. 5 seconds) and will give you clear feed-back that the joint is closed.

What is important when I prepare the drillings?

  • Drilling depth for both joiners (8 and 12 mm type)
  • Drilling depth for the stud of the8 mm system
  • Drilling depth for the stud of the 12 mm system
  • Produce clean drilling holes
  1. 40 mm +2/-0 mm
  2. 9 mm +1/-0 mm
  3. 14 mm +1/-0 mm

The holes must be drilled absolutely straight. Remove any chips and drilling dust. Please use drills with impeccable cutting properties only.

What is important when undoing INVIS?

Identify position of the joiner with the magnet finder. Ensure you have chosen the right direction of rotation to undo the joining element (check the direction on a separate joiner)

Position the actuator so that the knocking sound can be heard clearly.

Keep the switch pressed down until the clicking sound stops. If the fastening is very tight, the INVIS actuator must be operated for longer.