York tensioners are designed to mount securely onto a flat surface with just a single screw. The tensioners allow minimal clearance between the belt and mounting surface. Tensioners also feature different shaft lengths so they are also adjustable by York to provide greater clearance heights if needed. The York website’s Tensioner Configuration Tools automatically account for shaft changes, if needed, when they create the specific tensioner part number for your application. Where even greater belt clearances are needed, York can provide machined, anodized spacers to act as a raised tensioner mounting base. Spacers are available in custom thicknesses while standard catalog spacers .38 inches thick (9.7 mm) for Size 4 and .25 inches (6.4 mm) for Size 3 tensioners are always in stock at York. Spacers are shown below and fit within the same footprint as the tensioners themselves. The spacer part numbering system uses the last two digits of the part number to indicate the thickness in decimal inches, with a tolerance of +/- .01 (+/- 0.25 mm).