- 11 HPWS: Compact size yet heavy duty the 11 HPWS is ideal for most firewood operations. With a fast 6 second cycle time the 11 HPWS can split up to 3 cords/hr. If your fast enough to feed it. - 24 HPWS: Designed specifically for tree services and large commercial firewood splitting operations the 24 HPWS commercial firewood splitter is in a class of it's own! Because it has a 24 HP engine we are able to use a single stage hydraulic pump has 3 advantages over 2-stage pumps: 1. When used with our custom 4 1/2" x 24" cyl. you get a true 8 sec. cycle time (2-stage pumps slow to a crawl when splitting tough chunks). 2. Single stage pumps run cooler than 2 stage pumps. 3. Single stage pumps are rebuildable - 2 stage pumps are not.