Onsite Line Boring & Sleeve Installation for Verstegen Grabber
Client: Verstegen Grabber
Industry: Marine & Shipbuilding
Location: UK
Service: Onsite Line Boring & Sleeve Installation
Project Duration: 3 Days
Marine Onsite Line Boring & Sleeve Installation
Royce Onsite Machining was contracted by Kongsberg Marine and Shipping to carry out onsite line boring and sleeve installation on a critical marine component.
The component had eight heavily worn and damaged bores, with approximately 10 mm of bore ovality affecting their condition and alignment. Royce developed a precision marine machining and bore repair solution that could be completed onsite, avoiding the need to remove the component for workshop repair.
The complete repair was delivered in three days, combining onsite line boring, precision sleeve manufacture, liquid nitrogen-assisted sleeve installation and final machining.
The Challenge
Repairing the component required all eight bore positions to remain accurately aligned throughout the machining process.
The key requirements were:
- Repair eight worn and damaged marine component bores.
- Remove approximately 10 mm of material during bore preparation.
- Maintain accurate alignment across all eight bore positions.
- Manufacture eight precision replacement sleeves.
- Install the sleeves onsite using liquid nitrogen.
- Complete final line boring to achieve the required bore dimensions.
- Verify the finished repair against OEM requirements.
- Complete the repair within a three-day timeframe.
The Onsite Machining Solution
Precision Bore Preparation
Royce engineers inspected and measured the eight existing bores before carrying out precision onsite line boring.
Approximately 10 mm of material was removed from the damaged bore locations, creating accurately prepared surfaces for the replacement sleeves while maintaining the alignment between all eight positions.
Precision Sleeve Manufacture
Eight replacement sleeves were manufactured in Royce Onsite Machining’s Harlow workshop.
Manufacturing the sleeves in-house allowed dimensions and tolerances to be controlled before the components were transported to site for installation.
Liquid Nitrogen Sleeve Installation
The replacement sleeves were installed onsite using liquid nitrogen-assisted fitting.
Cooling the sleeves allowed them to be accurately positioned within the prepared bores, providing a controlled installation process across all eight bore locations.
Final Line Boring & Verification
Following sleeve installation, the bores underwent final line boring.
Approximately 3 mm was removed from the bore diameter, bringing the finished dimensions within the applicable OEM limits.
Final dimensional and alignment checks confirmed that the repaired bore positions met the required specifications.
Project Results
- 8 marine component bores repaired
- Approximately 10 mm removed during bore preparation
- 8 precision replacement sleeves manufactured
- Liquid nitrogen sleeve installation completed onsite
- Approximately 3 mm removed during final boring
- Bore alignment restored to OEM requirements
- Repair completed in 3 days
- Component removal and replacement avoided
Marine Component Repair Without Removal
Large marine components can be expensive and disruptive to remove for conventional workshop machining.
By bringing specialist onsite machining equipment and engineering expertise directly to the component, Royce Onsite Machining can carry out critical bore repairs while helping reduce transportation, dismantling, reassembly and downtime requirements.
This project demonstrates how onsite line boring and sleeve installation can provide an effective repair solution for heavily worn marine components.
Specialist Onsite Line Boring Services
Royce Onsite Machining provides onsite line boring, bore repair, sleeve installation and precision machining for marine, shipbuilding and heavy engineering applications.
Our engineers can repair worn, damaged or misaligned bores on large components without the need for removal to a conventional machining facility.
Need an onsite line boring solution? Contact Royce Onsite Machining to discuss your marine machining or bore repair requirements.
