In-Situ Machining Services: Expertise, Applications, and When to Use Them

In-situ machining, also known as on-site machining or portable machining, is a critical maintenance and repair solution for industries where downtime, access limitations, or component size make traditional workshop repairs impractical.

With a history dating back to the earliest days of portable machining, Reekie Machining has been at the forefront of delivering precision on-site machining services to global industries since 1946.

This guide provides a complete overview of:

• What in-situ machining is

• When to choose on-site machining over workshop repairs

• Common in-situ machining applications

• The history and expertise behind modern portable machining

What Is In-Situ Machining?

In-situ machining is the process of carrying out precision machining operations directly on installed or fixed equipment, without dismantling or removing components from site.

Specialist portable machine tools are mounted directly onto the workpiece, allowing repairs and modifications to be completed accurately in the equipment’s true operating position.

👉 Learn more in our detailed guide:

Why Choose On-Site Machining?

On-site machining is widely used in heavy and critical industries because it offers significant advantages over conventional workshop repairs.

Key benefits include:

• Reduced downtime

• Lower overall repair costs

• Improved safety through reduced lifting and transport

• Greater accuracy by machining in the installed position

• Extended asset life

For many assets, in-situ machining can reduce outages from weeks to days — or even hours.

👉 Find out when on-site machining is the right choice:
When to Choose On-Site Machining Over Workshop Repairs

Common In-Situ Machining Applications

In-situ machining covers a wide range of repair and maintenance activities, including:

• Flange facing – restoring sealing faces

• Line boring – repairing worn or misaligned bores

• Pipe cutting and pipe preparation – supporting welding and fabrication

• Shaft and journal machining – restoring rotating equipment

• Structural and datum surface machining

• Emergency and breakdown repairs

These applications are routinely performed in environments where access is limited and reliability is critical.

👉 Explore the most common applications:
Common In-Situ Machining Applications

Industries That Rely on In-Situ Machining

On-site machining services are essential across many sectors, including:

• Marine and ship repair

• Oil and gas (onshore and offshore)

• Power generation

• Nuclear

• Steel and heavy manufacturing

• Offshore and renewable energy

Each industry presents unique challenges that require experience, specialist equipment, and strict quality control.

The Origins of Modern In-Situ Machining

Modern portable machining did not emerge overnight. It developed from early field repairs in shipbuilding, railways, and wartime engineering, where components were too large or critical to remove.

During the mid-20th century, a small number of specialist companies began developing commercially available portable machining equipment, laying the foundations for today’s industry.

👉 Read about the companies and innovations that shaped the industry:
The Pioneers of Modern In-Situ Machining

Reekie Machining: Leaders in On-Site Machining Since 1946

Founded in 1946, Reekie Machining is one of the earliest pioneers of in-situ machining services. From the introduction of some of the first commercially available flange facing machines to decades of global service delivery, Reekie has played a central role in shaping the industry.

Today, Reekie Machining delivers:

• Flange facing services

• Line boring services

• Pipe cutting and preparation

• Complex and emergency on-site machining repairs

Reekie’s machinists operate worldwide, supporting critical assets in some of the most demanding industrial environments.

Choosing the Right In-Situ Machining Partner

Successful on-site machining depends on more than just equipment. It requires:

• Proven methodologies

• Skilled and experienced machinists

• Industry-specific knowledge

• A strong safety and quality culture

With decades of continuous operation and a pioneering heritage, Reekie Machining provides clients with confidence that repairs will be completed safely, accurately, and efficiently.

Speak to Reekie Machining

If you are considering in-situ machining or need expert advice on the best repair approach for your equipment, Reekie Machining can help.

Contact Reekie Machining to discuss your on-site machining requirements and benefit from decades of industry-leading expertise.