Onsite In-Situ Mains Bearing Journal Honing & Superfinishing
Client: Confidential
Industry: Marine & Shipping
Location: Iceland
Duration: 48 Hours
Service: Onsite In-Situ Mains Bearing Journal Honing & Superfinishing
Overview
A marine vessel operating in Iceland required urgent mains journal repair to avoid extended downtime and maintain operational reliability. Royce Onsite Machining was commissioned to complete a full in-situ crankshaft hone and superfinish, carried out entirely on-site within a 48-hour window.
The goal was to restore surface integrity, optimise bearing performance, and return the engine to service without crankshaft removal.
Challenge
Inspection identified:
- Journal surface wear and imperfections
- Reduced surface finish quality affecting bearing performance
- Risk of escalating damage if left unaddressed
- Critical time constraints due to vessel operational schedule
Traditional removal and workshop machining would have resulted in significant downtime and logistical delays.
Solution & Methodology
1. On-Site Assessment
- Full crankshaft inspection and measurement carried out in situ
- Condition assessment confirmed suitability for on-site restoration
- Baseline surface and dimensional data recorded
2. Precision Honing
- Journals honed to restore correct geometry and surface conformity
- Improved bearing contact characteristics achieved
- Enhanced lubrication retention properties established
3. Superfinishing Process
- Ultra-fine surface finishing applied to reduce friction
- Improved micro-surface structure for bearing efficiency
- Optimised surface quality for long-term operational reliability
4. Final Verification
- Dimensional checks confirmed restoration within required tolerances
- Surface finish verified against engineering requirements
- Final inspection approved crankshaft for immediate return to service
Technical Summary
- Service Type: In-situ crankshaft honing & superfinishing
- Location: On-site (Iceland)
- Duration: 48 hours
- Method: No dismantling required
- Outcome: Restored surface integrity and performance
Outcome
The crankshaft was successfully restored on-site within 48 hours, eliminating the need for removal, transport, or extended vessel downtime. The engine was returned to service with improved surface finish, reduced friction characteristics, and restored operational reliability.
This project demonstrates the capability of Royce Onsite Machining in delivering rapid-response marine crankshaft surface restoration solutions, even in remote and time-critical environments.
