Tag: metal stitching and metal locking

Crack Repair Using Metal Stitching and Metal Locking | RA Power Solutions

Cracks in cast iron and other metal components can lead to significant operational challenges in the power generation, marine, manufacturing, and heavy engineering industries. Traditional repair methods, like welding, often introduce thermal stress, weakening the material over time. With over 44 years of experience, RA Power Solutions specializes in metal stitching and metal locking, two highly effective cold repair techniques that restore the integrity of cracked components without causing additional damage.

What is Metal Stitching?

Metal stitching is a cold repair method for mending cracks in cast iron, aluminum, and other metals without welding. It involves drilling precise holes along the crack, inserting metal stitching pins, and locking the pieces together to restore the component’s original strength. This technique is ideal for engine blocks, turbine casings, compressors, and other high-stress industrial machinery parts.

Metal stitching and Metal locking
Metal stitching and Metal locking

What is Metal Locking?

Metal locking is a reinforcement method used alongside metal stitching. Custom-designed locks are inserted into the stitched area to provide additional support, preventing further crack progression and ensuring a long-lasting repair. This method enhances the durability of the repaired component, making it as strong as or even stronger than the original structure.

metal locking
Metal locking

Why Choose Metal Stitching and Metal Locking?

Compared to traditional welding, metal stitching and locking offer several advantages:

  1. Cold Repair Process: No heat is applied, preventing material distortion, stress buildup, and further cracking.
  2. Onsite Repairs: No need to transport heavy machinery; repairs can be performed at the client’s location, reducing downtime.
  3. Retains Original Strength: Unlike welding, which can weaken cast iron, metal stitching and metal locking maintain or even improve the structural integrity.
  4. Cost-Effective: Eliminates the need for expensive replacements and reduces overall maintenance costs.

Benefits of Metal Stitching and Metal Locking

RA Power Solutions has successfully performed repairs for various industries, including:

  • Marine Industry: Repairs on ship engine blocks and connecting rods to avoid costly replacements.
  • Power Plants: Restoration of turbine casings, generators, and compressors to maintain efficiency.
  • Manufacturing Plants: Fixing cracks in heavy-duty machines and industrial equipment.

RA Power Solutions provides metal stitching and metal locking services in countries across Asia, the Middle East, Europe, Africa, and the Americas, including India, UAE, USA, UK, Saudi Arabia, Germany, Singapore, and Australia. With a strong global presence, the company offers onsite repair solutions for industries like marine, power plants, and heavy engineering, helping clients avoid costly replacements and downtime. Their expertise extends to Malaysia, Indonesia, Qatar, Oman, Kuwait, Bangladesh, Sri Lanka, the Philippines, Vietnam, Nigeria, Brazil, Germany, Singapore, Malaysia, Indonesia, and South Africa, ensuring reliable crack repair services worldwide.

Crack repair by metal stitching
Crack repair by metal stitching

For more information regarding repair cast iron, repair crack cast iron, or cast iron repair,  crack repair by metal stitching and metal locking, contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.




Cracks in cast iron and other metal components can lead to significant operational challenges in the power generation, marine, manufacturing, and heavy engineering industries. Traditional repair methods, like welding, often introduce thermal stress, weakening the material over time. With over 44 years of experience, RA Power Solutions specializes in metal stitching and metal locking, two … Continue reading “Crack Repair Using Metal Stitching and Metal Locking | RA Power Solutions”

Metal Stitching | Metal Locking | Repair of Cast Iron by Metal Stitching – RA Power Solutions

When cast-iron or aluminum engine blocks crack, the traditional fix—welding—is often expensive, risky, and destructive. At RA Power Solutions, we specialize in advanced cold repair techniques—metal stitching and metal locking—that restore structural strength without applying heat, requiring machining, or dismantling equipment.

With the improvement in repair technology now, it is possible to repair the crack in cast iron, steel, or aluminium component by metal stitching and metal locking process. The main feature of repair of crack or damaged casting by metal stitching, metal locking, and metal surgery is that process does not require disassembly of the equipment and taking the crack or damaged part to the workshop.

What Are Metal Stitching & Locking?

  • Metal Stitching is a precise, cold repair method. Technicians drill a series of aligned holes across the crack, insert metal “keys” or studs into a dovetailed pattern, and tighten them so they interlock—effectively sealing the fracture and restoring rigidity.
  • Metal Locking reinforces the stitching with custom-shaped metal inserts that prevent the crack from spreading further and enhance the repair’s long-term durability
Damage Area of Engine Block
Damage Area of Engine Block
New Casting Inserted for Repair of Engine Block
New Casting Inserted for Repair of Engine Block

RA Power Solutions has the team of experience technicians. They can travel to the site with tools and consumables required for metal stitching and metal locking undertake the repair.We repair cracks by metal locking and metal stitching while maintaining the original profile. In most cases, the process does not require any machining. Scientific tests prove that the repaired crack portion has greater tensile strength than before.

RA Power Solutions with the experience of forty five years in this field extends metal locking and metal stitching services for repair of damaged casting. We can also execute the repair while the vessel is sailing. We offer the lowest cost compared to our competitors.

Metal Stitching | Repair Cast Iron | Cast Iron Repair

Get your crack or broken components manufactured out of cast iron, cast steel or aluminium repair by metal stitching and metal locking process. RA Power Solutions with experience of more than four decades have successfully repaired thousands of major engine components and components installed in heavy industries all over the world.

The damage to the component may be serious, or the cracks are multiple. RA Power Solutions engineers have the experience, know how and necessary tooling to execute the most complicated and serious damage which takes place due to accidents in cast iron, cast steel and aluminium casting.

For more information on cold metal stitching engine block, cast iron engine block repair, metal stitching surgery, metal stitching engine block, repair cast iron, and metal stitching of engine block please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Metal Stitching & Metal Locking of Engine Block Under Process
Metal Stitching & Metal Locking of Engine Block Under Process
Metal Stitching of Engine Block by Special Keys & Locks
Metal Stitching of Engine Block by Special Keys & Locks

FAQs:

1. What are metal stitching and metal locking?

Metal stitching involves drilling a series of aligned holes across a crack, inserting interlocking metal keys or studs, and tightening them to seal the fracture. Metal locking uses custom-shaped inserts that reinforce and prevent crack propagation.

2. Do these methods require dismantling the equipment?

No. We perform the repairs in situ, without disassembling the machinery or removing the damaged part from its position

3. Will the original surface or shape be affected by the repair?

We maintain the original profile after metal stitching and locking, and in most cases, no machining is needed afterward

4. Is the repaired area as strong as the original component?

Yes. Scientific studies show that crack areas repaired by metal stitching and locking often have greater tensile strength than before

5. Can repairs be performed while the vessel is underway?

Absolutely. We can execute repairs while the vessel is sailing, minimizing downtime and logistical challenges

When cast-iron or aluminum engine blocks crack, the traditional fix—welding—is often expensive, risky, and destructive. At RA Power Solutions, we specialize in advanced cold repair techniques—metal stitching and metal locking—that restore structural strength without applying heat, requiring machining, or dismantling equipment. With the improvement in repair technology now, it is possible to repair the crack … Continue reading “Metal Stitching | Metal Locking | Repair of Cast Iron by Metal Stitching – RA Power Solutions”