Some here have made jigs to make cutting with a hacksaw less vibratory.....LOL Simply take a block of wood, like a short piece of 2" x 4" and rip grooves into it that match the three rails of tubular track. For best results, cut the grooves using a table saw. Make sure they are deep enough for "O" gauge track and wide enough for the rails to fit into. But not too wide, the rails should fit snuggly.
Place the track, upside down into the grooves and cut the track with your hacksaw. The jig prevents the rails from wanting to follow the hacksaw blade back and forth.
Personally, I use a right angle grinder with a thin cutoff blade. It's the quickest way to make perfectly square cuts. Depending on the size of the Dremel blade, the body of the tool usually prevents the blade from going all the way through the track perfectly square.
If you only use the right angle grinder for cutting tubular track, a Harbor Freight model might just be the best choice. They are incredibly inexpensive.
