MarineShaft Repair & Overhaul
Cold Straightening of Shafts and Rudder Stocks
Class-approved cold straightening of bent propeller shafts and rudder stocks from 20 mm to 1,500 mm diameter, without heat, as a permanent repair.
Description
Cold straightening is MarineShaft's core capability. Bent propeller shafts and rudder stocks are straightened without applying heat, using purpose-built hydraulic presses of up to 6,000 tonnes, which preserves the original metallurgy. The method was first approved by Bureau Veritas in 1972 and is recognised by all leading classification societies as a permanent repair without conditions.
Key features
- Shaft and stock diameters from 20 mm up to 1,500 mm, with no length limitation
- Press force up to 6,000 tonnes
- Alignment precision to a maximum deviation of 0.05 mm
- Initial inspection and measurement, NDT (including penetrant inspection) before and after straightening
- Repair procedure approved by the classification society; final inspection with class certificate
Applications
Propeller, tail and intermediate shafts and rudder stocks bent by grounding, contact or other damage.
Specifications
| Shaft diameter range | 20 mm to 1,500 mm |
|---|---|
| Length | no limitation |
| Press force | up to 6,000 t |
| Max deviation | 0.05 mm |
More from MarineShaft
- Propeller, Thruster and Pod Repair
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- MarineShaft Manufacturing of Shafts and Rudder Stocks
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- Gearbox Repair
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- Micro Welding
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- On-site Alignment and Measurement
- Mobile Machining and Installation
- 3D Scanning
- Technical Supervision
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