- Clean the surface before trying to remove the broken stud.
- Flatten the broken end.
- Punch with centering punch at the centre of broken stud.
- Use a small drill to make a hole on the broken stud , ensure no damage to threads.
- Again drill a little bigger hole and ensure no damage to threads
- Use the stud extractor to remove the broken stud by rotating in anti clockwise direction
- Note-- stud extractor has a left handed thread. We can also remive the broken stud by using WD 40 and turning the stud with the help of screw driver or chiesel
1. High cost: Manganese bronze is a costly alloy, making it less economical for large propellers. 2. Low strength-to-weight ratio: Compared to other propeller materials like nickel-aluminum bronze or stainless steel, manganese bronze has a lower strength-to-weight ratio. 3. Susceptible to corrosion: Manganese bronze can corrode in seawater, especially when exposed to high velocities and turbulence. 4. Poor cavitation resistance: Manganese bronze is more prone to cavitation damage than other materials. 5. Difficult to cast and machine: Manganese bronze is challenging to cast and machine, making it less desirable for complex propeller geometries. 6. Limited weldability: Manganese bronze has poor weldability, making repairs and modifications difficult. Nickel-aluminum bronze or stainless steel are commonly used for propellers due to their: - High strength and durability - Excellent corrosion resistance - Good cavitation resistance - Ease of casting and machining - Weldability
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