9 Teeth Sprockets #40 Roller Chain Sprocket (9-Tooth, 1/2 【Note】A freewheel sprocket is a flat sprocket with a sealed bearing that allows free rotation. Single Bearing Sprocket Sourcing Map #25 Chain Roll Gear 6 Mm Bore 1/4 Inch Distance 19 Tooth Single Beach Chain Sprocket C45 Carbon Steel 25 Roll Chain Sprocket With Set Screws For ISO 04C Chain Mechanical Transmission Sprocket SpecificationsMaterial:Crafted made of C45 carbon steel, the teeth are quenched and heat-treated at high temperature and have a black oxide Coatingon the surface, featuring high hardness, good abrasion resistance, strong rust resistance and durabilityFeatures: Precise fit and premium materials reduce friction, prolong chain and drive component lifespan Tips:A freewheel sprocket is a flat sprocket with a sealed bearing that allows free rotation. Our 19-tooth sprockets conform to international ISO, DIN, or American ANSI standards. We stock 19-tooth chain sprockets for a wide range of applications... Sell ROLLER CHAIN SPROCKET IDLER 16 TOOTH #41 CHAIN 1/2 BORE. USA FAST... 【Material】Crafted made of C45 carbon steel, the teeth are quenched and heat-treated at high temperature and have a black oxide Coatingon the surface, featuring high hardness, good abrasion resistance, strong rust resistance and durability Idler sprockets are typically fixed on a stationary shaft at a designated position