Check the listing for details. BOSTON GEAR Gear,Spur,12 Pitch. Condition: New. Listed at 60.00 USD. Reborable Steel Gear12 Diametral Pitch14.5° Pressure Angle20 Teeth1.667" Pitch DiameterDESCRIPTION Spur gears are designed to transmit motion and power between parallel shafts. Configurations include spur, rack, pinion wire, stem pinions, and internal gearsmost with a selection of bores, keyways, and setscrews. Fine-pitch gears are available in plastic, brass, stainless steel, and steel. Heavier pitch spurs are available in steel and cast iron. Styles include plain, web, web with lightening holes, or spoked. Change gears have consecutive numbers of teeth for a variety of ratios.FEATURESMore cost effective, quieter running and metallic optionsFour ball wear test 40 kg: 63 mmReliability from steel, cast iron and brassParallel shaft applicationsBase oil viscosity: 500 SUS @ 100 °F