| Rudder Pintle Rebuilt With Belzona 1111 | | | Industry:Marine (MRNE) | | | Application:Mechanical Power Transmission (MPT) | | | Customer Location:Portland, OR, USA | | | Application Date:November 2015 | | | Application Situation:Rudder pintle shaft on a 700' US Navy ship. | | | Problem:Shaft was corroded and pitted from salt water. | | | Products:Belzona 1111 (Super Metal) | | | Substrate:Steel | | | Application Method:All of the damaged areas were removed with a lathe. The surface was then prepared with the lathe to leave a super rough thread pattern to ensure a full mechanical bond. Again, using the lathe, Belzona 1111 was applied with a slow rotation. After a sufficient amount of material was applied, Belzona 1111 was allowed to fully cure and then machined to the required specifications. There was one low spot and a couple of air pockets visible, so those areas were once again abraded and a further layer of Belzona 1111 was applied and allowed to cure before the final machine cut was made. The final finish was made using emery cloth, leaving a perfect smooth finish. | | | Belzona Facts:Welding would risk warping the shaft and would have taken probably close to ten times the man-hours to complete. The actual time spent on this process was no more than 6 hours, not including cure time. | | | Photographs Description
- Shaft already machined down, some damage still visible.
- Rough cut thread pattern.
- Applying Belzona 1111.
- Completed application, finishing with emery cloth.
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