Repair of Crack Gearbox by Metal Locking and Metal Stitching

About Repair of Crack Gearbox by Metal Locking and Metal Stitching

RA Power Solutions was approached by a company advising about the damage of Gearbox base manufactured out of cast Iron. This Gearbox is used for the main engine to Propeller shaft. The base was broken into pieces. 

The details of damage observations are mentioned below.

Sr No.	Description
1	Repair of Cracked Gear Box for Main  Engine to Propeller shaft
2	Length of the cracks Inboard leg	160 mm
3	Length of the cracks Outboard leg	148 mm
4	Thickness of casting cracked	55 mm
5	Engine Make & Model	Yanmar Model no. YXHG-2500LM
6	Place of Execution of Job	Kandla Port Gujarat

The thickness of casting was observed as 55mm that is more than 2 inches.

RA Power Solutions undertakes the repair of crack or damaged cast iron, Aluminum, and bronze heavy components by metal stitching or metal locking process which is simple and is a proven process of repair of damage and cracked casting.

Repair of Crack Gearbox by RA Power Solutions technicians:

i) RA Power Solutions deputed two technicians for undertaking inspection and metal stitching of Gearbox. 

ii) After removal of paint including the Red oxide the cracked area was subject to Dye penetrant inspection and also MPI by high-intensity magnaflux torch to check the location, length and intensity of the cracks. 

iii) As mentioned above the cracks measuring 160 mm and 148 mm length were observed.

iv) The thickness of casting was 55 mm which made the repair by metal locking & metal stitching process more difficult. 

v) Our technicians executed the damage Gearbox repair successfully by using the special master locks, locks and keys.  

vi) For details of the process followed by our technicians to undertake the crack repair of gearbox by metal stitching please go through our blogs written in our dedicated website: https://www.metalstitchinglocking.com/

Advantages of Crack Repair by Metal Lock process:

i) The main advantage of crack repair by metal locking & metal stitching is that in majority of cases the crack repair can be executed onsite without dismantling of the equipment. This not only saves the time & money but also saves from the botheration of transportation of heavy components to the workshop.  

ii) It is a cold process and does not require any major machining. It is very important in case of repair of engine housing where the requirement of alignment is within 0.03 mm. 

iii) No heat is generated hence no distortion. 

iv) With the introduction of the latest technology, process and experience of our technicians, we are able to successfully repair the engine major components like cylinder liner, cylinder head, turbocharger casing etc 

No-Heat, Stress-Free Gearbox Repairs

Our mechanical cold repair process ensures your gearbox stays intact and stress-free. By utilizing metal locking and metal stitching, we avoid heat, thus preserving the original metal properties and alignment. The finished repair is machined flush with the surface, restoring performance and reliability.


Versatile and Efficient Application

Whether it's cast iron, mild steel, or alloy steel, our repair technique is effective across a range of housing materials and sizes. Capable of handling both short hairline and extensive through-cracks, this method is suitable for gearboxes, engine blocks, transmission cases, and various other machinery components.


Minimal Downtime, Maximum Convenience

We eliminate unnecessary disruptions by offering both onsite and workshop repair options. Our skilled team can typically complete repairs within 1-3 working days depending on the crack length and gearbox type, drastically reducing equipment downtime and restoring functionality quickly.