TRK-5120 1-1/4" STAINLESS STEEL SPINDLES FOR REVOLVING TRUCK ASSEMBLIES
Our Stainless Steel Spindles are strongly recommended for any application that could put considerable stress on the truck and spindle assemblies. Examples could include large eagles, tall flagpoles, roof mount applications, extremely large flags or high wind areas. Several spindle lengths and NPT thread size combinations are available. For correct selection, contact Customer Service.
Selecting the correct thread size for a spindle based revolving truck Revolving truck assemblies generally consist of a truck body rotating on some form of a bearing configuration and a spindle assembly which is usually threaded to fit the top of the flagpole shaft. While there is no formal industry standard for thread size, the most commonly used format is National Pipe Thread or NPT. The most common size is 1 1/4" NPT while 1" NPT and 1 1/2" NPT can also be found. Threads that are cut in an NPT format are measured and expressed differently than National Coarse (NC) or National Fine (NF) threads. When determining the proper thread for a spindle assembly, the following approximate dimensions for measuring across the bottom of the spindle should help determine the NPT size to be ordered. As a reminder, pipe threads are tapered but this should be close enough for size determination. Unless otherwise stated, all Revolving Truck Assemblies offered have 1 1/4" NPT spindles. Should you need a different size, contact us. In many cases, alternative spindles are available