Tag: metal locking and metal stitching

Metal Stitching And Metal Locking Services For Crack Cast Iron Repairs | Global Leaders

RA Power Solutions specializes in metal stitching and metal locking, offering a trusted and effective solution for repairing cracked or damaged cast iron components. Unlike traditional welding, which can cause heat-induced stress and distortion, our cold repair techniques ensure structural integrity without compromising the original material properties.


What is Metal Stitching and Metal Locking?

Metal stitching and metal locking are specialized cold repair techniques used to restore cracked or damaged cast iron and other metal components without welding or heat application. These methods are widely used in industries where heat-based repairs could cause further damage, distortion, or weakening of the material.

Metal Stitching
Metal stitching is a mechanical repair process that joins broken metal parts by inserting precision-engineered metal stitches along the crack. These stitches restore the strength and integrity of the component while keeping the original structure intact. The process involves:

  • Drilling holes along the crack in a controlled manner.
  • Connecting the holes with a milled slot to create a secure stitching channel.
  • Installing metal stitches or keys that pull the broken sections together, creating a seamless repair.

Metal Locking
Metal locking is an advanced reinforcement technique that works alongside metal stitching. And Enhance the repair’s strength. It involves placing metal locks perpendicular to the crack to distribute stress evenly, preventing further damage. This makes the repair permanent, durable, and capable of withstanding high loads and pressure.

Metal Stitching Under Process

Why Choose RA Power Solutions?

  • 44+ Years of Experience – The only company in India with decades of expertise in metal surgery, metal locking, and metal stitching.
  • Onsite Repairs – No need to dismantle heavy machinery; we repair components at your location, minimizing downtime.
  • Global Reach – Our team has successfully completed over 1000 crack repair projects worldwide, serving industries across various sectors.
  • Trusted by Leading Companies – Major corporations in India and internationally rely on us for cost-effective and high-quality repairs of heavy cast iron components.

At RA Power Solutions, we use portable and lightweight equipment, allowing our skilled technicians to provide onsite repair services at any plant or site in India and worldwide. With over 44 years of experience, we are the only company in India. With a proven track record in metal locking and metal stitching. Our expertise has made us a trusted partner for major companies globally.

Metal Locking

Leading industries in India and across the world rely on our services. For crack repair and restoration of heavy cast iron components.
For more information on metal stitching service providers, metal stitching, cast iron stitching, or cracked engine block repair. please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Overhauling of Main Engine Repair | Repair of Engine Metal Stitching of Damaged Block

RA Power Solutions received an emergency call from a Steel Company based in Indonesia regarding damage of their Engine SULZER 6RND68.

On arrival of our team of engineers, it was observed that lower engine block of SULZER 6RND68 was damaged badly. Hence it required disassembly of complete engine, overhauling and repair of engine block by metal stitching & metal locking.

Damaged Engine Block
Damaged Engine Block

Following is the brief of job description executed:

  • Inspection and overhaul of the cylinder covers including the fuel and starting valves located in the covers. The cylinder covers cooling spaces were also inspected, cleaned and fitted back with new O-rings.
  • Dismount, Inspect and overhaul the exhaust valves, renewed the seals and grinding the valve spindles.
  • The cylinder liners were cleaned, calibrated and honed in order to restore the liners running surfaces and remove ovality. This ensured that the piston rings perform better and this will lead to a better overall cylinder condition, compared to if honing had not been done. The cylinder liners cooling spaces were also inspected, cleaned and fitted back with new o-rings.
  • Replacement of thrust block pads and correction of end play.
  • Metal locking of damaged Engine block by our technicians.
Special Keys & Locks Used in Metal Stitching Process
Special Keys & Locks Used in Metal Stitching Process
Repair of Engine Block by Metal Stitching is in Process
Repair of Engine Block by Metal Stitching is in Process
  • Inspected and adjusted the chain drive.
  • Retightened the stay-bolts, holding down bolts end chocks.
  • Took bearing clearances with a telescopic feeler gauge and checked bearing edges by wire gauges.
  • Crankshaft alignment measurement was taken with dial gauge (autolog method)
    Conclusion: The engine was tested on full load for 72 hours & all the parameter were recorded. The engine is performing satisfactorily.
Repair & Overhauling of Engine is in Process
Repair & Overhauling of Engine is in Process
Inspection of Engine Spare Parts is in Process
Inspection of Engine Spare Parts is in Process

For more details regarding Metal Stitching of Damaged Block, overhauling of engine, repair of engine metal stitching of damaged block, crankshaft grinding, and engine block repair please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.