Metal Locking and Metal Stitching Archives

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.

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

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

Inspection of Engine Spare Parts is in Process

For more details regarding 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.

Insitu Crankpin Machining | RA Power Solutions

Sulzer model 6RTA Engine was reported damaged on high seas near Mombasa on transit to Sri Lanka. On investigation, it was observed that the connecting rod bolts got sheared damaging the lower and upper engine block and three crankpins of the Crankshaft.

A team of RA Power Solutions technicians having experience in undertaking insitu crankpin machining and a team undertaking repair of crack and damaged engine block by metal stitching and metal locking process was deputed on board a vessel within a short notice as all of them have a seamen passport.

Repair of Engine Block by Metal Stitching Process

On preliminary examination, multiple cracks on the upper and lower crack cases of the engine block were observed measuring in totality 2900 mm in terms of length. Three crankpins were damaged developing taper and ovality exceeding more than 1 mm. RA Power Solutions team of technicians worked non-stop and executed the repair of crankpins by an onsite crankshaft grinding machine. All pins were undersized to 1.5 mm due to the damage.

Crankpin After Grinding by Crankshaft Grinding Machine

The engine block cracks were repaired by metal locking and metal stitching process. The complete job was executed within 68 hours. The hard work, knowledge, experience, and sincerity of technicians have been very much appreciated by the owners. This achievement was possible due to RA Power Solutions having the latest design of equipment, and experienced technicians having Indian CDC.

For more information on crankpin machining, metal locking and metal stitching process please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

Lock and Stitch Cast Iron Repair by RA Power Solutions Pvt. Ltd.

Repair of cracks developed in commonly used industrial castings and metal is possible to repair by cold method called lock and stitch. It is also known as metal stitching and metal locking. In case of cast iron equipments and parts damaged in to pieces.

RA Power Solutions Pvt. Ltd. undertakes repair by lock and stitch process which is cold method as no heat is generated. Crack repair by lock and stitch method in cast iron is proved to be of great success in comparison to the crack repair by welding.

In case of critical cast iron components like engine block, main journal housings, cylinder heads, turbine casings crack repair by metal stitching is highly recommended as it does not develop any misalignment of the casting or shrinkage. We undertake crack repair of cast iron for last more than 37 years on time, within budget and with experienced technicians.

Cast iron repair by metal stitching and metal locking process have following main advantages:

Repair of broken casting or crack developed in casting irrespective of its length is possible on site without dismantling the equipment.
Saves replacement of parts or equipments in totality and reduces downtime.
Cast iron repair by metal stitching and metal locking is the only process which restores strength in cast iron beyond the original casting.

Engine Block of MAN Diesel Engine Broken Ito Pieces

Metal stitching and metal locking is the only method known to be successful in replacing of the large pieces of broken casting with new piece.
Metal stitching and metal locking is the process which caters to heavy industry.

RA Power Solutions Pvt. Ltd. is the only company which can undertake crack repair by Lock and stitch method while vessel is sailing.

Metal Stitching of Forging Press – Crack Measuring 230 inches

Repair of Engine Block of Yanmar Engine on Vessel

For more details regarding Engine Block of MAN Diesel Engine please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

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 by metal stitching and metal locking 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 metal locking and metal stitching 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 by metal stitching, metal locking, 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 Block – 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.

Material Used in Metal Locking and Metal Stitching Process

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

RA Power Solutions Pvt. Ltd. undertakes metal stitching and metal locking of casting and has successfully repaired various major components of 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 Equipments etc.

In last 36 years more then 650 jobs of crack repair have been successfuly executed.

Stitching Pin Used in Metal Stitching Process

Metal Stitching Done in Broken Area of Generator

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.

Metal Stitching of Crack Casting | Crack Repair In Grey Cast Iron- RA Power

In the case of cracks developed in the casting of mechanical equipment, the repair of metal stitching and metal locking is proved to be the best and most successful process. In the case of the engine block and turbine casings, heavy castings are used in mechanical equipment. It is quite difficult to replace them due to cost, time factors and interchangeability issues.

The repair of cracks by metal stitching and metal locking is a cold process. No heat is generated and the same original profile is maintained. In case of cracks developed in the housing of the engine block, the crack is repaired by metal locking and metal stitching is highly recommended as there is no distortion in the central line of the housing takes place.

RA Power Solutions have experienced technicians to undertake the metal stitching and metal locking process with a guarantee.

Crack Repair in Grey Cast Iron | Aluminium and Cast Steel Components

We undertake the crack repair in grey cast iron, aluminium and cast steel components by a cold process named metal stitching, metal locking, and metal surgery. As a diesel engine repair and overhaul company with four decades of experience, we understand the criticality and load factor of the major components of engines. For the crack repair of components, planning is done based on its application, stress, and load characteristics. The use of a special metal lock and keys is decided by our experienced engineers based on the extent of cracks. All the repairs undertaken by us by metal stitching and metal locking of grey cast iron, aluminium, and cast steel components are guaranteed for satisfactory performance.

Metal Stitching of Jenbacher Engine Block Under Process

Metal Stitching of Jenbacher Engine Block

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, Malta, and Cyprus.

For more information on crack repair in grey cast iron and aluminium, metal stitching services, and cold metal stitching contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.