| Simple gear train |
Compound gear train |
Elliptical gear train |
|---|---|---|
| Only one gear in each shaft and there is a relative motion between shaft axis. | In this gear there is more than one gear on the shaft which is rigidly fix and mashed with the gear on another shaft forming gear train. | The axis of shaft on which the gear are mounted may move relative to the fixed axis. |
| For large speed reduction, large size of gear is required. | For large speed reduction the small gear ratio is required. | For large speed reduction in high velocity moderate size gear is required. |
Simple gear train
Compound Gear