Re: Increase mower blade speed?
Well, my experience goes way back to my Sears Super Suburban 12 48 inch deck when I still had it. Even on the largest / aggressive of the engine pulleys, it was always a slow tip speed deck and even with razor sharp freshly ground blades, would leave certain grasses, not even very long grass, laid over or just twisted if you know what I mean. I always cursed those stubby little blades.
However, increasing blade speed on an older deck may have some issues. Are the spindles and bearings designed for increased speeds? Are blades well balanced? Are the pulley bearings capable of increased speeds, or belts able to handle possible increased heat? I'd hate to see something come apart at a high speed it wasn't designed for.
Maybe its just time for an upgrade to a newer, higher speed mower and deck?
X 500 48" Deck 48" blade
Stihl BR 600
Sears Suburban Super 12 1968
Craftsman 1990 something LG Tractor 46" deck
Original Kohler 8hp Giant Vac early 1960s