ring gear

Engines with manual tranny usually have much flywheel, typically 5 to 40 kg of cast iron, with the starter band equipment shrunk onto the exterior.
That is done by heating the ring to around 200 °C to expand the ring which is then rapidly positioned onto the flywheel, often held in firmly against a spot shoulder until coolin in calm air . The interference suit between ring gear inside dia. and flywheel, usually which range from 0.20mm to 0.50mm, renders the starter band firmly attached to the flywheel.

1. Heating must be performed as uniform as planetary gearbox feasible rather than with a gas burner, as this process causes great temperature distinctions to the pieces.

2. the temperature should be 200°C. A temperature higher than 350°C will affect the gear tooth hardness.

3. Do not utilize compressed air or coolant to cool down the ring.

4. A precise centering and flattening of the pieces in the flywheel is an absolutely essential condition.

5. The initial center distance should be maintained.

6. Cool power press system ought to be avoided due to a substantial stress triggered to the hardened area.

Engines with automated transmissions instead have a pressed metal plate with the starter band gear usually welded onto the exterior of the plate.