Page 3 of Roller Chain Sprockets by Ringball Corporation (RBL)

sprocket descriptions sprocket markings sprocket nomenclature hd40sk36 40b25ss h d 40 sk 25 ss hardened teeth number of strands chain pitch of 40 sprocket type number of teeth stainless steel d double strand t triple strand q quadruple strand all hardened teeth are induction or flame hardened sprocket hardness most of the small diameter driver/pinion sprockets are induction hardened to rockwell c35-50 larger diameter sprockets are flame or induction hardened to rockwell c25-40 the depth of hardness is strictly controlled ensuring proper hardness of the tooth working area yet maintaining a strong tooth core nomenclature od outside diameter pd pitch diameter hd hub diameter d l gd groove depth diagram the diameter of the sprocket from the tip of a tooth to a corresponding point diametrically across the sprocket the diameter across the pitch disk this is derived from where the chain pin lies as it is meshed upon the sprocket the diameter across the sprockets hub stock bore the diameter of the bore the length through the bore this is measured from the face of the sprocket to either the opposite face or the hub face the depth of the groove within the hub for standard keyway dimensions please refer to page 4 rbl sprockets are produced from quality steel and meet or exceed ansi standards during production rbl specifications are adhered to strictly thus ensuring consistently quality made sprockets this assures long wear for your power transmission products specially made sprockets can be manufactured to your unique specifications contact your local ringball office for more information 3

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