In this blog post, we’ll dive deep into the specifics of HAAS REVO Thru-post Tensioners and provide a comprehensive guide on how to install them. These tensioners are essential for creating a secure and polished railing system, ensuring both functionality and aesthetic appeal.
To begin, you’ll need your marking template handy. Use it to mark the spots on each side of the post where you’ll be drilling holes. When drilling through the posts for the cable railing fittings, we recommend drilling halfway from one side and then completing the hole from the other side. This technique prevents the drill bit from splintering as it exits the post, ensuring a clean and precise hole.
Grab your drill and a 3/8†spade bit, making sure to adjust the drill to its highest speed setting. Align the drill bit with your marked spot on the post, ensuring it’s as straight and level as possible. Begin drilling until the hole reaches approximately halfway through the post. Repeat this process for all the remaining marks on the same side, then flip the post and repeat the procedure on the opposite side. By doing this, all your holes should align perfectly.
After drilling, always clear out any leftover sawdust from the holes to avoid blockages. At this stage, your cables should already be secured at the other end of the railing by your end stops. Ensure that the cables pass through any intermediate posts in the setup as well. If you haven’t installed the end stops yet, consider checking out other tutorials on HAAS Stainless REVO Standard and Low-Profile Endstops, as well as HAAS Stainless REVO Lag End Stops.
Your REVO through-post tensioner consists of four main components: the swage stud, which attaches to the cable’s end; the centering bushing, which slides into the mounting hole on the back of the post; the 1/4-20 hex nut, which threads onto the stud and tightens the cable; and the end cap, which gives the installation a sleek, finished look.
Start by trimming the cable to the appropriate length for the tensioning fitting. Feed the cable through the hole in the post and pull it taut from the backside to eliminate any slack. Mark the cable where it enters the post, then release the tension and use the swage stud to measure the cut mark. Align the stud’s opening with the initial mark on the cable and create a second mark based on the indentation lines on the stud. Using a cable cutter, trim the cable at the second mark. Repeat this process for all cables in the setup.
Slide the wood post protectors onto the cables if applicable, ensuring they’re correctly oriented. Insert the cable end into the swage cavity of the stud, noting the swage area extends from the opening to the first indentation line. Swage the stud twice—first closing the handles of the swager, then rotating the stud 90 degrees and swaging again.
Thread the stud through the post, followed by the centering bushing, which goes into the mounting hole on the back of the post. Thread the hex nut onto the stud until it’s hand-tight. Repeat these steps for all cables in the setup.
For the final tensioning, start with the middle cable, then alternate between the top and bottom cables, moving outward. Ensure all cables are evenly tensioned before cutting the excess stud threads with an angle grinder. Finish by threading on the end caps to complete the installation.
With these steps completed, your railing system is now fully functional and visually appealing. For further details or troubleshooting, feel free to explore additional resources or reach out to professionals.
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