B436 Pro SeriesIndustry leading balance, warranty, and track record. The true professionals machine.Bartell Pro Series power trowels are built to with stand the rigours of everyday use, and still include a class leading 3 year warranty. See how our warranty matches our competitors.Available in 36” or 46” variations, all trowels are manufactured from heavy gauge steel and jig welded to ensure complete rigidity.Our gear box and spider design is where Bartell Pro series really excel. Gear boxes are produced from Precision machined aluminum, and contain heavy duty bronze and steel worm gears. Our spider design uses matched tolerances between the hub and arms to ensure no flex. This design keeps the trowel blades down firmly to eliminate high spots fast. Production rates are the result.