ring gear

Engines with manual transmission usually have a heavy flywheel, typically 5 to 40 kg of cast iron, with the starter band equipment shrunk onto the exterior.
This 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 location shoulder until coolin in calm air . The interference suit between ring gear 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 possible and never with a gas burner, as this process causes great temperature differences to the pieces.

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

3. Do not make use of compressed atmosphere 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 original center distance must be maintained.

6. Cool power press system should be avoided because of to a planetary gearbox substantial tension caused to the hardened area.

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

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