What is an involute gear ?
A gear which utilizes a part of an involute curve in its tooth form is called an involute gear.
There are many advantages to involute gears.
Other than gears which use cycloidal curves called cycloidal gears that are applied mostly in clock mechanisms, the majority of gears presently used are involute gears.
Merits of involute gears :
- Have a simple tooth form which is easy to produce and less costly
- Teeth cutting tools (rack cutters which have straight line tooth forms) are inexpensive and easy to make
- Even when there are errors in assembly distance, the teeth engagement is smooth and rotation is accurate
- When the module and the pressure angle are the same, several gears with a different number of teeth can be made with the same tool