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In-Situ Machining

Do you want to minimize costs and equipment downtime?
Choose on-site machining as an alternative to machine repairs.

Injegov can offer a full range of in situ machining services for various marine and industrial applications, using specialized custom-made portable machining tools.

Now owners can take advantage of our range of equipment and machining capabilities for performing complex operations. Among those are line boring, journal machining, flange facing, metal stitching, and even reconditioning by laser cladding at their premises—all of the above without dismantling or transporting critical big-size equipment. 

When managers and owners seek to minimize costs and equipment downtime, on-site machining has become a popular alternative to conventional machining methods saving time and money eliminating complex overhauls and logistics coordination.

With an extensive range of specialized in situ machining equipment and qualified machinists, INJEGOV performs specialized on-site machining projects ranging from flange facing and boring to stud removal and grinding applications.
Besides the extensive tooling available, INJEGOV S.A. has certified technicians for metal stitching on engine blocks, pump casings, compressors, etc.
The Lock n Stitch method with many class-approved projects completed.

Whether restoring corroded mating surfaces, removing a stuck cylinder head stud, stitching an engine block, or reaming intermediate shaft bolt housings, Injegov S.A. has the right equipment and know-how. 

Benefits of Injegov on-site machining

Line Boring

Line boring applications range in size and requirements. They may include from line boring of engine crankshaft or camshaft bearing pockets, stern tube housings or bracket boring to tail shaft bolt holes or engine block liner corroded housings boring for installing new sleeves. 

At injegov, we operate two versatile line boring machines with adjustable length (up to three meters), diameter machining capabilities, and laser alignment equipment. 

A typical project we perform includes the following: 

  • Diesel engine main bearing pockets and camshaft bearing housings line boring
  • Tail-shaft bolt holes line boring and honing, including fabrication and installation of new bolts and nuts
  • Line boring of diesel engine liner block landing surfaces and installation of sleeves
  • Alignment and line boring of various bracket housings for marine and industrial applications
  • Machining of stern tube bush housing 
Flange Facing – General In situ machining

Our expert machinists every year perform a large number of flange facing and general in situ machining projects.

These may include: 

  • Flange machining in power plants and oil refineries
  • Wind turbine casings
  • Cargo crane foundations
  • Bow or azimuth thrusters 

 Additionally, we perform general machining on compressors, pumps, heat exchangers, and valve maintenance projects. Our flange-facing tools have a maximum diameter capacity of 3 meters. At the same time, we can always fabricate custom tools depending on the specific application. 

Metal Stitching

Metal stitching has been around for many years as a proven repair method for repairing damaged cast iron parts. Injegov has been using the Lock n Stitch metal stitching method for many years. Our certified technicians ensure proper application and class approval of repairs. Lock n Stitch is widely considered the best metal stitching method. It uses rigid locks and pins with specially designed thread, resulting in the higher pulling power of the damaged material than other methods.

Metal stitching of castings presents the following advantages: 

  • It does not introduce heat as a cold repair method, causing residual stresses, cracking, or misalignment, common issues with traditional welding.
  • Metal Stitching done right produces a water/gas-tight repair.
  • Repairing using the Lock n Stitch method restores the original strength characteristics of the part.
  • Fast delivery times
  • Permanent repair
  • Class approved repair

Parts we typically repair are:

  • Diesel Engine blocks
  • Steam, Gas, or Hydro Turbine casings
  • Pump casings
  • Compressor casings
  • Various castings

By using the full torque inserts, we can also perform efficient repairs of damaged studs.

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Shaft Journal Machining

Worn journals on shafts are a common problem we encounter both on board vessels and land-based applications. Due to size or time, managers or owners cannot send the shaft to the workshop for machining; we can dispatch our team of specialist machinists who can machine on-site and repair worn shaft journals with high accuracy and fast completion time.

Applications of the shafts we typically repair: 

  • Tail shafts
  • Intermediate shafts
  • Turbine rotor shafts for steam, gas, and hydro turbines
  • Alternator shafts
  • Various shaft types in power generation, petrochemical, steel, and concrete production industries


Designed with reliability and rigidity in mind, our shaft journal machining tools perform with high accuracy. With Air motors, self-centering bearings, built-in gears, and rigid frames, our shaft machining tools can machine shafts with 900mm diameter.

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