ring gear

Engines with manual tranny usually have a heavy flywheel, typically 5 to 40 kg of cast iron, with the starter ring 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 spot shoulder until coolin in calm air . The interference match between ring equipment inside dia. and flywheel, usually ranging from 0.20mm to 0.50mm, renders the starter band firmly mounted on the flywheel.

1. Heating must be performed as uniform as feasible rather than with a gas burner, as this technique causes great temperature differences 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 surroundings or coolant to cool down the ring.

4. An accurate centering and flattening of the parts in the flywheel is an absolutely essential condition.

5. The original center distance must be maintained.

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

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