Tag: 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 locking of Engine Block by Experienced Technicians | Bangladesh

At RA Power Solutions Pvt. Ltd., we offer specialized cold metal locking and stitching services for repairing cracked or damaged engine blocks and cast components—without welding or heat damage.

Real-World Case Study: Wartsila 18V32 Engine Block Repair

  • A power plant engine block of Wartsila 18V32 suffered catastrophic failure due to a connecting rod—and was estimated by OEM at 9 months delivery time and prohibitively high cost.
  • RA Power Solutions completed the repair onsite, without dismantling the crankshaft or removing major parts, while it remained installed on its foundation. The damaged area exceeded 72″ × 42″.
  • With over 45 years of experience and more than 1,300 major block repairs, we delivered a cost-effective, fast-response solution with a permanent outcome.
Metal Stitching & Locking of Crankcase Door is under progress
Metal Stitching & Locking of Crankcase Door is under progress

Why Choose Our Metal Locking & Stitching Service?

  • Completely cold process — no heat input or welding means no thermal distortion or damage.
  • Insitu crankshaft repairs—no transport or dismantling, meaning minimal downtime and operational disruption.
  • Superior mechanical strength—the stitched repair often regains or exceeds original tensile capacity.
  • Applications across materials—effective for cast iron, steel, and aluminum in engines, compressors, turbines, pump casings, and more.
  • Dedicated, experienced technicians who can mobilize worldwide—Metal locking of Engine Block, including vessel boarding with Indian CDC clearance—for fast turnaround.

Our Repair Workflow:

Step Activity
 Crack Detection Magnetic particle inspection (MPI, Level 2 certified) identifies crack location, length, and severity.
Damage Preparation Damaged sections are drilled and cleaned for accuracy.
Stitching Key Installation Special pins and interlocking metal keys are inserted across the fracture.
Surface Finishing Pins are ground flush; no further machining is required—original profiles are preserved.
Final Checks Optional pressure testing ensures a gas- or water-tight seal when needed.

For more details regarding metal stitching, metal locking services, repairing cast iron metal lock, cast iron repair, and Metal Locking of engine block at Low Price, email us your query at rajshahani@rapowersolutions.com or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

FAQs:

1. What is metal locking of an engine block?

It’s a cold repair process to fix cracks in cast iron or steel engine blocks without welding.

2. How does metal locking work?

Special pins and metal locks are inserted across the crack to restore strength without heat.

3. Is metal locking better than welding?

Yes, because it avoids heat distortion, maintains alignment, and prevents further cracking.

4. What materials can be repaired using metal locking?

Cast iron, cast steel, aluminum, and other brittle metals.

5. Can metal locking be done onsite?

Yes, RA Power Solutions offers in-situ repairs worldwide without dismantling the engine.

At RA Power Solutions Pvt. Ltd., we offer specialized cold metal locking and stitching services for repairing cracked or damaged engine blocks and cast components—without welding or heat damage. Real-World Case Study: Wartsila 18V32 Engine Block Repair A power plant engine block of Wartsila 18V32 suffered catastrophic failure due to a connecting rod—and was estimated by OEM … Continue reading “Metal locking of Engine Block by Experienced Technicians | Bangladesh”