Using BigHead TwinDisk

Asymmetric disks with - male thread

On this page our test piece is 43mm thick heavy-duty chipboard with solid wood facings. We have used a fairly heavy thread on this example - an M8 stainless; we can supply up to M16 if required. Stud height can also be varied.

• Variable-height, heavy duty fastenings

  The TwinDisk principle works very well in its male version. Given that the choice of main stud is sufficient to cope with the lateral and tensile forces likely to be encountered, the rotating top disk allows a wide range of material thicknesses to be catered for. The standard BigHead range includes bottom disks of up to 70mm in diameter - suitable support for M16 threads.

• Lateral/shear forces - top skin support

  In the example shown, the solid wood top skin is 5mm thick and is well able to accept a 2.2mm rebate cut, ensuring the maximum resistance to lateral stresses. In this method it is vital that a ‘dry run’ is done, to measure and fix the positioning of the top disk after drilling both holes; after glue is applied to the top skin, the top disk cannot then be spun down completely without disturbing the top layer of glue.

• Retro-fit ability - a tailored fastening

  The heavy-duty male TwinDisk is already proving popular in retro-fitting cabins and decks in the marine world, and for seating in municipal transport projects. The quick, simple method of drilling a hole down to the inner surface of the bottom skin; adding adhesive; winding the top disk down; and gluing into position, saves significant amounts of time and labour, as well as ensuring very high service performance.