I have a Stickler that I bought at least 25 yrs. ago. I've split many cords of wood with it,without incident. Like working with any power tool one must be vigilant! I run my tractor at idle speed with the PTO on,I figure the screw speed to be 150 RPM. The single most important rule is,don't split anything shorter than 3'. I generally split my wood at 4' lengths.