Course No. 98
Gears and Gearing – Worms and Worm Gears
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.
Prerequisites: Knowledge of spur gears, gear ratios, gear installation, helical gears, and bevel gears.
Click to View Format