Line boring Machining

Client: Confidential
Industry: Power Generation
Location: Asia
Duration: Completed within days
Service:  https://royceonsitemachining.com/services/line-boring-services-for-diesel-engine-bedplates/ 

Overview 

Royce Onsite Machining was mobilised to Asia to rectify severe fretting damage on a large engine, affecting main bearing pocket No. 8 and resulting in misalignment beyond OEM tolerances. Our team delivered a complete on-site laser alignment and machining solution, successfully restoring the engine without the need for removal or strip-down.

Work Carried Out

• Full laser alignment and dimensional inspection
• Milling of main bearing horizontal faces (1 mm material removal)
• Line boring of main bearing pocket No. 8 to oversize
• Refurbishment of two main bearing caps

Technical Highlights 

• Deployment of a custom-designed milling machine equipped with electronic sensors for high-precision control
• Flatness maintained at 99%, with parallelism held within 0.02 mm
• Bore alignment achieved within 0.04 mm
• Final bore diameter finished to 303 mm +0.03 mm

Outcome 

The on-site repairs fully restored engine alignment to OEM specifications, extending component service life and eliminating the need for costly dismantling or transportation. The client reported a high level of satisfaction and subsequently commissioned Royce Onsite Machining to repair three additional engines.