Stud Removal Machine

The Vo-Tech Stud Removal Machine is a portable, specialized tool designed for on-site machining of broken, seized, or sheared studs. Rather than attempting to unscrew a stud that has failed, the machine drills and bores the stud out through controlled, accurate machining — recovering the threaded hole intact and preserving the parent component for re-use.

The machine delivers the most accurate and reliable repair method available when traditional extraction has failed or is impractical: studs broken flush with the surface, studs broken below the surface, studs seized or corroded into the parent material, and studs where conventional extraction tooling has already been attempted unsuccessfully. Rigid construction holds the cutting tool centered on the stud axis throughout the operation, eliminating the wandering and thread damage that plague hand-held drilling approaches.

When to Use a Stud Removal Machine

The machine is the correct repair method when any of the following conditions apply:

• The stud has broken flush with the parent surface
• The stud has broken below the parent surface
• The stud is seized or corroded and will not turn
• Traditional extraction methods (easy-outs, welded handles, heat-and-turn) have failed
• Thread damage from extraction attempts must be avoided
• The component cannot be removed for shop machining

How the Machine Works

1. Mounting and Alignment

The machine mounts directly to the flange or component using existing bolt holes or a custom fixture plate engineered to the application. The field machinist establishes precise alignment so the cutting tool is centered on the broken stud’s axis. Machine rigidity holds that alignment throughout the operation — the foundation for accurate, thread-preserving repair.

2. Controlled Drilling and Boring

Once aligned, the machine drills and bores the stud to controlled dimensions. The cutting tool follows the stud axis rather than wandering into the surrounding parent material, removing the stud entirely while leaving the original threaded hole geometry intact for re-tapping or insert installation.

3. Hole Recovery

With the stud machined out, the threaded hole can be re-tapped, fitted with a thread insert, or otherwise restored to service per the component’s repair procedure. The component returns to service without disassembly, transport to a machine shop, or replacement.

Key Benefits

• Preserves threaded holes — controlled machining removes the stud without damaging the parent threads
• Recovers components that would otherwise be condemned — pressure vessels, turbine casings, and reactor heads remain in service
• Performs the work in place — no component disassembly, transport, or shop machining required
• Reduces personnel exposure — in nuclear applications, controlled machining shortens time at the work face compared to extended manual extraction attempts
• Compresses outage schedules — accurate first-pass repair eliminates the rework cycles that follow failed extraction
• Reduces repair risk — eliminates the unpredictable outcomes of heat application, impact tools, and progressive thread damage
• Improves worker safety — eliminates the high-force, awkward-position work associated with manual extraction

Common Applications

The Stud Removal Machine is deployed in environments where large studs cannot simply be extracted and where damaged threaded holes carry significant cost or schedule consequences:

• Pressure vessels
• Turbine casings
• Pump and valve flanges
• Heat exchangers
• Nuclear reactor vessel heads
• Steam generator and condenser components
• Large industrial equipment with bolted flange connections

Industries Served

• Commercial nuclear power generation
• Fossil and combined-cycle power plants
• Petroleum refining and petrochemical
• Shipyards and naval maintenance
• Heavy industrial manufacturing
• Pulp and paper
• Marine and offshore

Built for Field Service

The machine is engineered for portability and field deployment — moving to the work, mounting directly to the component, and delivering shop-grade machining accuracy in environments where shop-grade machining is not otherwise available. Adjustable leveling and a range of fixture-plate options accommodate flange geometries across pressure vessels, turbine casings, valve bodies, and reactor components.

Engineered, Built, and Supported In-House

Every Vo-Tech Stud Removal Machine is designed, manufactured, and supported at the company’s Crystal Lake, Illinois facility. Custom fixture plates, application-specific tooling, and on-site technical support are available for customers operating in regulated or high-consequence environments where first-pass success is non-negotiable.

Contact Vo-Tech to specify a Stud Removal Machine configuration, request engineering consultation for a specific application, or arrange a quote.