Course Number 98 Gears & Gearing - Worms & Worm Gears  9.5 hours of instruction  Format: Programmed Instruction Self-study Price: $30.00

Identification of worms and worm gears, their dimensions, and how to measure them; "hand" and threads, and how to determine them; linear pitch and circular pitch, and use of formulas to determine them; requirements for worms and worm gears to mesh; pressure angle, helix angle, and "lead"; relationship among "lead", linear pitch, and number of threads of worms; use of catalogs to select and identify worms and worm gears; gear ratios and speed ratios, and use of standard formulas to find them; direction of rotation and how to determine it; thrust of worms and worm gears and how to determine it; and center distance, alignment, and centering of faces of worms and worm gears.

Prerequisites - Ability to perform simple arithmetic calculations and to read simple engineering drawings (Course 109). Knowledge of spur gears, gear ratios, gear installation, helical gears, and bevel gears (See related instruction below for gear prerequisites).

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Related Instruction:

Course Number 26 - Spur Gears

Course Number 61 - Gear Ratios

Course Number 66 - Gear Installation

Course Number 71 - Helical Gears

Course Number 76 - Bevel Gears