ring gear

Engines with manual tranny usually have much flywheel, typically 5 to 40 kg of cast iron, with the starter band gear shrunk onto the outside.
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 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 ring firmly attached to the flywheel.

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

4. An accurate centering and flattening of the items in the flywheel can be an absolutely essential condition.

5. The original center planetary gearbox distance should be maintained.

6. Chilly power press system should be avoided because of to a substantial tension caused to the hardened region.

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


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