Category: cold metal stitching

Metalock | Metal Stitching | Repair of Cracked Components

With over 45 years of global experience, R A Power Solutions specialises in the onsite repair of cracked and damaged components using advanced metal stitching and Metalock techniques. We regularly undertake metal stitching and metalocking for heavy industrial parts made from cast iron, cast steel, aluminium, bronze, and other critical engineering materials.

Components We Repair Using Metal Stitching & Metalock

We carry out onsite crack repair for a wide range of industrial components, including:

  • Bedplates
  • Forging hammers
  • Compressor bodies
  • Engine blocks and major engine components, such as cylinder liners and cylinder heads
  • Gearbox housings and similar heavy-duty castings

High-Quality Tools & Consumables for Reliable Repairs

Successful metal stitching requires precision, skill, and the right equipment. To ensure long-lasting repairs, we use:

  • Premium Pneumatic Tools
  • Imported pneumatic tools from leading U.S. manufacturers
  • Essential for preparing accurate profiles before stitching
  • Ideal for remote sites due to easy availability of compressed air

Specialized Metal Locks & Keys

Our repairs use high-grade metal locks, keys, and master locks. Selection is based on a metallurgical analysis of the damaged casting.
We always select consumables with superior properties compared to the parent material, ensuring a durable and high-strength repair.

Key Features of the Metalock Process

  • Cold process — no heat, no distortion, no stress on castings
  • Precisely placed locks mechanically reinforce cracked sections
  • Restores structural integrity without welding
  • Ideal for engines and heavy machinery where alignment is critical
Metal Stitching
Metal Stitching
Engine block window after repair
Engine block window after repair
Engine lock after metal lock and metal stitching
Onsite Engine Block Repair

Advantages of Metal Stitching with Metal Keys

  • Keys are inserted across the crack to seal and tighten the casting
  • Overlapping patterns distribute load evenly
  • Repaired areas often become stronger than the original casting
  • Suitable for cast iron, aluminium, bronze, and cast steel
  • Cost-Effective Repair Solution

Metal stitching and metal locking provide a highly cost-efficient alternative to component replacement. Many industrial parts are:

  • Expensive to replace
  • Long lead-time items
  • No longer manufactured
  • Repairing them onsite saves money, reduces logistics, and keeps operations running smoothly.
  • Fast, Onsite, and Minimum Downtime

Metal stitching, a fast repair method, often enables completion within hours, directly at the site, without the need to dismantle the equipment. Metal stitching is a fast repair method that can typically be completed within hours, directly at the site, without dismantling the equipment. This drastically reduces downtime and allows machinery to return to service quickly.

Global Onsite Crack Repair Services

R A Power Solutions delivers onsite metal stitching, metalocking, engine block repair, and cast iron crack repair services in major industrial regions worldwide. Our teams are actively working on several international projects, providing reliable, high-precision solutions for critical equipment.

Contact Us

For inquiries or technical assistance:
📧 rajshahani@rapowersolutions.com

📧 info@rapowersolutions.com

📞 +91 9582647131, +91 9810012383.

With over 45 years of global experience, R A Power Solutions specialises in the onsite repair of cracked and damaged components using advanced metal stitching and Metalock techniques. We regularly undertake metal stitching and metalocking for heavy industrial parts made from cast iron, cast steel, aluminium, bronze, and other critical engineering materials. Components We Repair … Continue reading “Metalock | Metal Stitching | Repair of Cracked Components”

Cast Iron Crack Repair | Metal Stitching Crack Repair | Repairing Crack Cast Iron by Metal Stitching & Metal Lock – RA Power Solutions

Metal stitching and metal lock process of repairing a crack casting or complete damage of cast iron parts of large equipments is considered to be the ultimate solution of successful repair. The repair of cracks and repair of damaged casting by metal locking or metal stitching process is simple and most effective method of repairing cracks in cast iron and aluminium components. The process is entirely a cold process and no heat is generated like in process of crack repair or damage casting repair by conventional and old method of welding.

RA Power Solutions having experience of more than forty years in providing cold metal stitching cast iron, onsite repair, and metal locking services for high-capacity main engine, auxiliary engine, and large and heavy rotary equipment installed on vessel or in industry. We extend crack repair services through our experienced and factory-trained technicians.

The following are the main features of crack repair undertaken by RA Power Solutions:

  • Detection of crack in cast iron or aluminium components: It is important that proper procedure is followed by experienced technicians to detect the exact location, length, and intensity of the crack. We have experience that in most of cases, no procedure is followed to identify the intensity of the crack which results to the failure of the component even after the repair by metal lock and metal stitching.
  • RA Power Solutions possess latest equipment to undertake MPI (Magnetic Particle Inspection) by qualified level 2 technicians, and we give great importance to the detection process of the cracks. The unattended cracks can grow and result to the failure of the component.
  • Once the number of cracks, length of crack, intensity, and depth of crack is determined and identified the repairs are undertaken by the metal stitching and metal lock process.

Some of the advantages of repairing cracks by metal stitching metal lock are mentioned below:

  • It is our experience that the majority of repairs of damaged components or cracks can be repaired on site with no requirement of dismantling the equipment. This reduces the downtime and of course the cost involved in dismantling and transportation of the equipment.
  • Repair of cracks and repair of damaged gray iron casting or aluminium by metal stitching and metal lock process does not generate any heat. Thus, it does not require any machining process. No alignment or profile is damaged.
  • In the case of diesel engines, compressors, or rotatory equipment majority of the parts are of aluminum or cast iron. It is possible to repair them by metal stitching metal lock process. Hence, no need of replacement of parts. It reduces cost of maintenance considerably.
  • Repair of crack by metal stitching metal lock process absorbs compression stresses which is of great advantage.

RA Power Solutions have been extending metal stitching, metal lock, and metal surgery services all over the world. The technicians with years of experience come to your site or on board the vessel for repairs. Our technicians possess Indian CDC and can board the vessel and sail in shortest possible time. Thousands of jobs of serious damage have been repaired successfully by RA Power Solutions.

For more information about cold metal stitching, metal stitching crack repair, cast iron metal stitching, repair of crack in cast iron casting, repairing cast iron metal lock, and metal locking services, please email us at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Metal stitching and metal lock process of repairing a crack casting or complete damage of cast iron parts of large equipments is considered to be the ultimate solution of successful repair. The repair of cracks and repair of damaged casting by metal locking or metal stitching process is simple and most effective method of repairing … Continue reading “Cast Iron Crack Repair | Metal Stitching Crack Repair | Repairing Crack Cast Iron by Metal Stitching & Metal Lock – RA Power Solutions”