Category: cast iron repair

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”

Cast Iron Crack Repair with Metal Stitching & Metal Locking

Experts highly recommend metal stitching and metal locking for repairing cracks in cast iron. Industries around the world use this cold repair technique because it delivers reliable and effective results when restoring cast iron components.

Broken cast iron pieces can also be replaced by a new piece of casting undertaking metal locking. This technology is as old as the introduction of cast iron casting in industry.

Insertion of Casting Piece in Engine Block
Insertion of Casting Piece in Engine Block
Metal Stitching of Jenbacher Engine Block in Process
Metal Stitching of Jenbacher Engine Block in Process

Metal keys and metal locks are used to undertake crack repair in cast iron casting.

Metal keys and Metal Locks are used in Metal Stitching/Locking Process

RA Power Solutions Pvt. Ltd. has a team of trained technicians who carry out metal stitching of broken or cracked castings directly onsite. They bring all necessary tools, consumables, and, if needed, a replacement casting to the site. The team repairs the crack onsite and avoids any need to disassemble or transport the equipment.

Metal Stitching Done in Broken Area of Generator
Metal Stitching Done in Broken Area of Generator

Tests and experience show that metal stitching repairs can strengthen cracked castings. The repaired section often becomes even more durable after the process. We execute crack repairs on board the vessel, in power plants all over the world.

Why Choose Cold Repair Over Welding?

Traditional welding uses heat to damage alignment, change grain structure, and weaken cast iron components. Cold repair procedures such as metal stitching and locking maintain the original material integrity. This results in stress-free, distortion-free, and high-strength solutions.

What Is Metal Stitching & Metal Locking?

Metal stitching is a cold bolt-locking process that includes drilling precise holes along a crack and inserting metal “keys” and studs into a dovetailed pattern. These studs bite into one another, tightening the crack and restoring structural rigidity.
Metal locking supports stitched joints with custom-shaped metal inserts, inhibiting additional proliferation and boosting long-term endurance.

We extend metal stitching services all over the world, including countries like Madagascar, Oman, Qatar, Philippines, Bahrain, Srilanka, Bangladesh, Myanmar, Turkey, Nigeria, Greece, Saudi Arabia, UK, Dubai, Singapore, Malta, and Cyprus, etc.

For more information on crack repair by metal stitching, Cast Iron Crack Repair, cast iron stitching, repair cast iron, cast iron metal stitching services, crack repair in cast iron, and repairing cast iron metal lock, contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131, or +91 9810012383.

FAQs:

1. What is metal stitching in cast iron repair?

Metal stitching is a cold repair process used to restore cracked or damaged cast iron components. It involves inserting special metal keys and locking pins across the crack to mechanically join and seal it—without using heat or welding.

2. How is metal locking different from metal stitching?

While both methods are used together, metal locking adds reinforcement by embedding strong metal locks or inserts that cross the crack. These locks increase structural integrity and prevent further crack propagation.

3. Why is metal stitching better than welding for cast iron?

Welding applies heat that can distort the casting and cause new cracks due to thermal stress. In contrast, metal stitching is a cold process, meaning there’s no heat, no distortion, and the original metallurgical properties remain intact.

Experts highly recommend metal stitching and metal locking for repairing cracks in cast iron. Industries around the world use this cold repair technique because it delivers reliable and effective results when restoring cast iron components. Broken cast iron pieces can also be replaced by a new piece of casting undertaking metal locking. This technology is … Continue reading “Cast Iron Crack Repair with Metal Stitching & Metal Locking”