With these rubber profile, you can make "stoppers", that prevents the
segments of a GRP masts to fall down into each other. As these masts
have no real mechanical lock, there is always a chance the segments
will loosen after some time (maybe over night). If you want to use the
mast for a longer peroid than a few hours, you must use a method
to fix the segments.
outer diameter: 10 x 6mm
inside diameter 6 x 3mm
color: greyInstruction sheet as pdf-file
A Novel Method to Secure GRP-Poles by Peter Bogner, DK1RP (www.DX-WIRE.de) Telescopic GRP-poles (Glass-fibre Reinforced Plastic) without mechanical locking devices are very popular among radio amateurs, because they are place-saving and of low weight. As the different segments are only kept together by “friction and pressure” these connections often slacken after a few days and the pole collapses. Therefore securing the transitions with adhesive tape is a simple and popular method to prevent the segments from slipping. However, the pole will soon be stained with remains of glue and the protective layer of lacquer can be damaged. Stainless steel hose clamps with rubber padding (as offered by Spiderbeam) are technically a good solution. They solve the problem perfectly for very tall GRP-poles of 18 meters or more. However, a set of such stainless steel clamps is quite costly and you should be very careful not to damage the GRP-segments with the metal clamps. Therefore we have tried to find a cheaper simple alternative that can be used for smaller and lighter GRP-poles. We found a manufacturer to produce for us a uv-resistant, rectangular rubber profile with a rectangular hole for threading a 4.8mm cable tieAfter cutting the rubber profile to the proper size for the segment you get an ideal “economy-collar” to prevent segments from slipping into the next larger elementAs the rubber profile is too big for the thinner top-segments of GRP-poles you can use scissors to cut and turn the hollow profile into two thinner U-profiles .
This novel technique is simple, inexpensive and reliable. The “rubber parts” can be marked with numbers and used again and again with new cable ties that can be purchased for as little as € 0,04 per piece. We offer:1,2 m rubber profile grey , uv-resistant, (OD 10 x 8mm, ID 6 x3 mm), only € 5,00100 pcs. cable ties, black, uv-resistant, 4,8 x 300 mm, only € 4,00