metal stitching cast iron Archives

What Is Metal Stitching and Metal Locking? A Trusted Cold Repair Technique: RA Power Solutions

When a metal component cracks—especially in large equipment like engine blocks, compressors, or turbines—repair options can be costly, time-consuming, and risky if not done correctly. One highly effective method that avoids heat, preserves alignment, and restores structural integrity is metal stitching, also known as metal locking.

Understanding Metal Stitching

Metal stitching is a cold mechanical repair process used to fix cracks or breaks in cast metals such as cast iron, aluminum, steel, and bronze. Unlike welding, which uses high heat, metal stitching relies on precision-drilled holes, specially designed stitching pins a nd locks to seal and reinforce the damaged area.
This technique is ideal for industrial applications where heat could distort components or where disassembly isn’t feasible.

Damaged Crankshaft before metal stitching

How the Process Works

Here’s a simplified breakdown of how metal stitching is done:

Crack Detection: Identify and inspect the full extent of the crack.
Drilling Pattern: A series of holes is drilled along and across the crack.
Slot Cutting: A slot is formed to fit stitching locks or keys.
Installing Locks: Metal locks are inserted into the slots to mechanically bind both sides of the crack.
Threaded Studs: In some cases, overlapping threaded studs are used to seal the crack.
Sealing & Finishing: The surface is peened and machined smooth to match the surrounding area.

Why RA PowerSolutions?

At RA PowerSolutions, we specialize in on site metal stitching and metal locking for all types of cast components. There is no need for dismantling or transporting the part.
With decades of experience and hundreds of successful global repairs. We help industries reduce downtime, avoid expensive replacements, and restore strength and performance efficiently.

Our services include:

Metal stitching of engine blocks, compressors, pumps, etc.
On site machining and grinding
Repair of crack-prone components like turbine casings and gearbox housings
ISO-certified technicians and portable tools

If you’re facing a critical breakdown or seeking long-term solutions for metal cracks, RA PowerSolutions is ready to assist with expert, onsite support. Contact us today to learn more or schedule an inspection.

For more details on the Metal Stitching and Metal Locking , Crack Repair by Metal Stitchng email us at info@rapowersolutions.com. Call at +91-9582647131,+91 9810012383.

FAQs:

1. What is metal locking?

Metal locking crack repair process – Metal-lock or metal stitching is a method of repairing fractures to castings, onsite without the use of heat. It involves sinking Metal-lock keys, perpendicular to a fracture. The fracture is then sealed and held rigid by Metal-lace studs

2. How is metal stitching better than welding?

Metal stitching does not use heat, so there’s no distortion or weakening of the material. It preserves the original shape and alignment of the part and is ideal for cast iron, which is prone to cracking when welded.

3. Can metal stitching be done on-site?

Yes, RA Power Solutions specializes in on site metal stitching, allowing us to repair damaged equipment without dismantling or transporting it—saving time, cost, and downtime.

Metal Locking and Metal Stitching Process- RA Power Solutions

Metal locking and metal stitching is a process of repair of cast metals having different metallurgy without the necessity of wielding. Metal locking and metal stitching is a cold and proven method of repair of cast iron and cast steel components.

The advantage of crack repair and broken casting by metal locking and metal stitching is that it can be carried out at the site anywhere and it even does not require dismantling of the equipment in most of the cases this results to considerable saving of time and money. Crack and broken casting repair is proven and is old method for crack repair it is widely used for heavy-duty plant and equipment, ship engine, heavy-duty forging presses, etc.

**Metal Stitching of JIBB Plate of 225 Ton**

We regularly execute crack repair by metal locking and metal stitching of following parts:

Engine Block, Cylinder Head, Generators, Turbo Chargers, Turbine Casing, Gear Box Housing, Pump Casings, Compressor Crank Cases, Forgings Hammer, Lathe / Press/ Milling/Boaring, etc .M/c. all Cast equipment etc.

RA Power Solutions is a leading provider of metal locking services. We have a team of experienced engineers and technicians who are skilled in using this technique to repair a wide variety of castings. We have a proven track record of success, and we are confident that we can provide you with a high-quality repair that will meet your needs.

If you have any questions about our services please contact RA Power Solutions. We would be happy to answer your questions and discuss your specific needs.

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

Metal Stitching and Metal Locking of Engine Blocks – RA Power Solutions

Engine blocks, casting and most of the parts are manufactured of common material like cast iron. Cracks developed in cast iron parts are most difficult to undertake repair by welding process as it needs pre-heating of the cast iron prior to the welding. In certain cases it can cost additional stresses resulting to the damage of casting.

It is proven that metal stitching and metal locking have the advantage of repairing cracks in cast iron casting due to the cold process using different profiles and materials of stitching pins and locks without applying any heat, as in the case of welding.

RA Power Solutions Pvt. Ltd. undertakes metal stitching and metal locking of casting and has successfully repaired various major components of a high-capacity diesel engine.

Application includes repair of Engine Block, Cylinder Head, Generators. Turbo Chargers, Turbine Casing, Gear Box Housing, Pump Casings, Compressor Crank Cases, Forgings Hammer, Lathe / Press/ Milling/Boaring etc .M/c. Other all Casting equipment etc.

In the last 45 years, more than 10,000 jobs of crack repair have been successfully executed.

Stitching Pin Used in Metal Stitching Process

Metal Stitching Done in Broken Area of Generator

RA Power Solutions is proud to say that we have a dedicated team of specialists who specialize in metal lock and metal stitching repairs. We promise good performance on all of our jobs. We have shown to be cost-effective and can deploy our team of professionals and consumables on short notice. We have recently expanded these services to Dubai, Greece, Maldives, Malaysia, Singapore, Madagascar, Nigeria, South America, UAE, Germany, Monaco, Qatar, Sri Lanka, Bangladesh, Italy, Spain, Czech Republic, UK, Nepal, Philippines, Jordan, Libya, Kuwait, Egypt, Morocco, Yemen, Bahrain, Tunisia, Sudan, Oman, Algeria, Saudi Arabia, Iraq, and others.

For more details regarding crack repair by metal stitching, engine block repair, cold metal lock stitching, and cast iron by metal lock & metal stitching, please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.