A couple of years ago I replaced K6CF's US Tower 72' tower with a new HDX series for this very same reason Mike's failed below... The main shaft going into the gearbox snapped allowing the pulley to
Having three crank-up towers here and just about ready to install one of the original HDX-689 crank-up's (Waiting for the foundation to cure), what gear box is recommended for this type of use? I hav
Mike's tower sounds like the shaft broke and not a gearbox failure. On the older MD-750 motor drives, the shaft was 1 inch coming out of the gearbox. (Tristao and then US Tower). US Tower then went t
Any one have any quality photographs of the shaft failure? I am looking at photographs of the fracture surface. That should tell us the mechanism of failure. Scott Mike's tower sounds like the shaft
I've witnessed two such failures, both were on older Tristao towers. The first happened during the hayday of the N6DX Mallibu hilltop contest station. We were raising a 72ft Tristao tower using its e
I just checked two of my crankups and the HDX-689 has a Hub City 381 60:1 reduction....and the HDX-589 has a Hub City 321 60:1 Reduction. The HDX-572 is painted over and cannot see the model...Im goi
I do have some photos of K6CF's failure and it is exactly as Skip mentioned. I'll get those to you. However, I don't think there is any real close-ups of the shaft. But you can CLEARLY see what broke
Hello Dino, I wonder if you could post those pictures here so we can see them as well?? I have two crank up towers and I am very concerned regarding that type of failure!! Many Thanks in Advance. ___