Full explanation
Hacksaw has not documented a longest-chain figure, and no reliable public source has one either. Any specific number you find ("the record is 14 respins") is almost certainly invented.
The reason a clean maximum is hard to pin down is the rule itself: a respin chain continues every time the spin produces a win and the symbols stay sticky, and it ends when a spin pays nothing or a Mystery Reel resolves the sequence. There is no built-in counter that caps it at a set length.
In theory that allows very long chains. In practice they are rare, because each additional respin still needs a fresh win to survive, and the odds of stringing many together drop quickly. The genuinely long chains people talk about are clip-worthy precisely because they almost never happen.
If you are curious how far they realistically go, the demo is the only honest test. Watching a few hundred spins will show you the typical chain length far better than a number someone made up for a listicle.
Why chains end when they do
A chain survives only while each respin produces a win and symbols stay sticky, and it stops on the first blank spin or when a Mystery Reel resolves the sequence. There is no internal counter forcing an end at a set number, which is why no clean maximum exists.
The probability of stringing many wins together drops with each additional respin, so very long chains are genuinely rare rather than capped. If you want a feel for the realistic range, the demo will show you typical chain lengths in a few hundred spins, which is far more honest than any single record number floating around online.
Since there is no official record to chase, the most useful thing you can do with a long chain is enjoy it while it lasts and not expect it to repeat. Each new chain starts from scratch with the same odds of dying as any other. A monster run is memorable precisely because the next one owes you nothing.