Foster Induction Private Limited

What is bolt heating machine?

Expanding bolts with induction is the proven time- and labour-saving alternative to inefficient flame and resistance heating. With induction, a specially designed coil is inserted into the turbine bolt. Rapid, precisely controlled and localized heat is then induced directly in the bolt. The heat expands the bolt by an exact, pre-decided length, making it easy to remove the nut.

What are the benefits

Foster Induction heat spreading is very accurate, due to the heat being generated within the component, you only heat the part you want to heat, and thus the bolt threads with nuts stay cold during the heating operation.
The heating process is very fast and accurate there simply isnt enough time for heat to travel into the thread area. And with induction there is no risk of rods melting inside the bolts.

In the bolt expansion process, focus on safety is vital for a consistent result and for avoiding damage to either personnel or the expansion bolt itself. It is very safe and easy method to heat power turbine nut bolt.

Its precise and localized heat is faster and safer than resistance and flame heating process.

Compact induction: 
You can move it around a workshop or factory floor.
Flexible: It can be fitted with various coils for various bolt dimensions. Induction coils can be changed in seconds.

Reduced costs:  Faster heat delivery, reduce the heating expenses compared to flame based high cost heating methods.

Improved quality: Precise repeatability of heating cycles is assured. The same amount of energy is applied to each bolt. A constant energy level and heating time is guaranteed.

Eco-friendly: No flames, no gas and virtually no radiant heat means a more comfortable, more productive working environment. Save energy-save environment.

FOSTER offers high-performance Induction Bolt Heating Machines designed for quick, safe, and efficient heating of large bolts, studs, and fasteners. Ideal for applications where conventional heating (torch/flame) is slow or risky, our machines use precision induction technology to deliver localized heat in seconds — enabling easy loosening or tightening of critical bolts.

Key Features:

• Flameless Heating – No open flame, safe for explosive zones

• Rapid Heat-Up – Heats bolts within seconds

• Targeted Heating – Only the bolt heats, not surrounding metal

• Digital Temperature Control

• Ideal for Frequent Maintenance in heavy industries

Technical Specifications:

• Brand: FOSTER

• Power Rating: 5 kW to 50 kW

• Voltage: 3 Phase, 415V, 50/60 Hz

• Heating Time: 10–90 seconds (depending on bolt size)

• Cooling: Water Cooled

Applications:

• Power Plants (Turbine Maintenance)

• Oil & Gas Refineries

• Mining & Heavy Machinery Maintenance

• Shipyards & Marine Engines

• Petrochemical Plants

• Heavy-Duty Equipment Servicing

Advantages:

• Safer Alternative to Flame Heating

• Reduces Downtime during Maintenance

• Easy to Operate – No special skills required

• Precise and Repeatable Heating Cycles

• Custom Coils Available for Unique Bolt Sizes/Shapes

CONTACT OUR SALES ENGINEERS NOW!!

Foster’s Induction Billet Heater is engineered for fast, uniform, and energy-efficient heating of metal billets prior to forging, extrusion, or rolling operations. Utilizing advanced IGBT/MOSFET-based power electronics and optimized induction coil design, this system ensures consistent temperature distribution, high throughput, and reduced oxidation — delivering superior productivity and metal quality.

Built for continuous industrial use, Foster billet heaters combine performance, reliability, and precision to meet the demanding needs of modern forging and forming industries.

• High-Efficiency IGBT Power Conversion for rapid and uniform billet heating

• Precise Temperature Control with Digital Monitoring

• Optimized Induction Coil Design for even heat penetration

• Low Scale Formation and Metal Loss

• Modular, Heavy-Duty Construction for 24/7 operation

• Automatic Feeding, Ejection & Handling Options

• Overload, Overheat, and Cooling Protection Systems

• Heating of Steel, Copper, Aluminum, and Brass Billets

• Preheating for Forging, Extrusion, and Rolling

• Hot Upsetting, Piercing, and Shaping Operations

• Integrated Use in Forging Lines and Automated Systems

• Forging & Forming Industries

• Automotive & Aerospace Component Manufacturing

• Non-Ferrous Metal Processing Units

• Tool & Die Manufacturing

• Foundries & Heavy Engineering Plants

• High Energy Efficiency with Fast Heating Cycles

• Uniform Temperature Across Billet Cross-Section

• Reduced Oxidation & Improved Surface Finish

• Low Maintenance & Long Service Life

• Custom Designs for Various Billet Sizes & Metals

• Reliable Foster After-Sales & Global Technical Support

Need a Quote?
Contact Foster Induction Pvt. Ltd. today for an advanced billet heating system engineered for performance, precision, and productivity.

Post weld heat treatment (PWHT) is a controlled process in which a material that has been welded is reheated to a temperature below its lower critical transformation temperature, and then it is held at that temperature for a specified amount of time. Preheating minimizes the temperature difference between the welding arc and the base material. This benefits the weldment in several ways. First is to lessen shrinkage stresses that can lead to cracking and distortion. Easy set-up is achieved using preheat blankets or flexible heating cables combined with user-friendly insulation blankets.
Foster Induction Pre Heat Systems Solve Ongoing Preheating & Stress Relieving Problems, our simple and cost-effective heating process can be applied in the following applications to deliver fast and consistent heat:

• Welding fabrication and construction;
• Preheating of welds;
• Post-weld heat treatment;
• Coating removal; 
• Shrink Fit.

Foster pre and PWHT applied to Preheating for welding of pipe lines for oil, gas, chemicals, water etc. Pipeline heating for transferring food products, petroleum products like wax, tar etc.

Useful for:- Industries we serve for Induction Pre Heating are Energy and environment, manufacturing, tube and pipe, automotive, aerospace and defense.

A Product by FOSTER
Proudly Made in India

Foster’s Portable Induction Heating Machines are compact, high-performance systems designed for on-site heating, brazing, shrink-fitting, and preheating applications. Powered by advanced IGBT/MOSFET induction technology, these units deliver rapid, localized heating with exceptional precision — ensuring safe, efficient, and flame-free operation wherever you need it.

Ideal for maintenance workshops, field operations, and manufacturing sites, Foster’s portable induction systems combine power, portability, and control in a rugged, easy-to-operate design.

• Lightweight, Portable Design for easy on-site use

• High-Frequency IGBT Induction System for fast, uniform heating

• Digital Temperature & Power Control Interface

• Instant Heat Generation with Zero Warm-Up Time

• Air- or Water-Cooled Configurations

• Custom Coils for Different Workpiece Shapes & Sizes

• Safety Protections – Overheat, Overload, and Low Water Flow

• On-Site Brazing of Copper, Brass, Aluminum, and Steel Components

• Shrink-Fitting and Bearing Removal in Maintenance Operations

• Preheating for Welding or Bending Processes

• Bolt Heating and Loosening in Heavy Equipment

• Laboratory and Field Repair Work

• HVAC & Refrigeration Systems

• Automotive and Heavy Engineering

• Electrical & Transformer Manufacturing

• Maintenance, Repair & Overhaul (MRO)

• Construction & Fabrication Workshops

• Compact, Mobile, and Easy-to-Use Design

• Fast, Clean, and Flame-Free Heating

• Energy Efficient with Minimal Heat Loss

• Precise Temperature Control for Consistent Results

• Suitable for Both Production & Maintenance Applications

• Reliable Foster Service & Global Support Network

Need a Quote?
Contact Foster Induction Pvt. Ltd. today for a compact, efficient, and customizable portable induction heating solution tailored to your needs.