Engines with manual transmission usually have much flywheel, typically 5 to 40 kg of cast iron, with the starter ring gear shrunk onto the outside.
This 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 which range from 0.20mm to 0.50mm, renders the starter band firmly attached to the flywheel.
1. Heating must be done as planetary gearbox uniform as possible and never with a gas burner, as this process causes great temperature variations to the pieces.
2. the temperature ought to be 200°C. A temperature higher than 350°C will affect the gear tooth hardness.
3. Do not make use of compressed air or coolant to cool off the ring.
4. A precise centering and flattening of the parts in the flywheel is an absolutely essential condition.
5. The initial center distance must be maintained.
6. Frosty power press system should be avoided due to a substantial stress caused to the hardened area.
Engines with automatic transmissions instead have a pressed metal plate with the starter band equipment usually welded onto the exterior of the plate.