Course Objectives • Explain the fundamentals of gear contacts, geometry and the materials employed • Review the major types of gears and their diverse operational properties • Describe how to select a gearbox for a given application and the factors that need to be considered • Show how to select and apply the correct lubrication • Teach what can be learnt from gear failure OUTLINE Ø GENERAL Ø GEARS HISTORY Ø GEARING LAW Ø GEAR TYPE AND ARRANGEMENT • GEAR TYPES • GEAR TRAIN o Single-Stage Gear Train o Types of Single-Stage Gear Trains o Two-Stage Gear Train Ø MATERIAL CHARACTERISTICS • GEAR MATERIALS o Steel Gears o Cast iron o Powder metal gears o Plastic gears • HEAT TREATMENT o Gear Hardening o Gear-Hardening Methods o Heat Penetration o Shaving Teeth before Hardening o Hardening-time Cycles o Distortion of Gears Ø OPERATIONAL ASPECTS • GEAR LUBRICATION o Gearbox Lubrication Properties o Special types of oil applicable for gearbox lubrication o Lubrication Methods o Lubricant Viscosity o Selection of Lubricant • GEAR NOISE • GEAR MAINTENANCE • GEAR FALIURE o Gear Faliure Analysis o Gear Failure Inspection o Gear Failure Type o Tests Ø GEAR DESIGN • GEAR TERMINOLOGY • DESIGN OF SPUR AND HELICAL GEAR • METRIC STANDARDS WORLDWIDE o ISO Standards o Foreign Metric Standards o Japanese Metric Standards o Symbols