ring gear

Engines with manual transmitting usually have a heavy 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 placed onto the flywheel, often held in firmly against a location shoulder until coolin in calm air . The interference match between ring gear inside dia. and flywheel, usually ranging from 0.20mm to 0.50mm, renders the starter ring firmly attached to the flywheel.

1. Heating must be done as uniform as feasible rather than with a gas burner, as this technique causes great temperature differences 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 off the ring.

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

5. The initial center distance must be maintained.

6. Chilly power press system ought to be avoided because of to a substantial planetary gearbox stress caused to the hardened area.

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