MARK VAN SCHAICK MARINE SERVICES

I would like to introduce Mark Van Schaick BV. (Hereafter referred to as MVS). The company is Owned and Managed by Mark Van Schaick, assisted by his two brothers Tjeerd and Frank. Mark started his own company about 16 years ago and currently has 30 full time staff. I would therefore like to take the opportunity to introduce you to the “MVS way” sotospeak.

Mark Van Schaick (MVS) is one of the premier repair companies in Europe undertaking specialised type of work as listed below. It’s also good to know that the major Engine makers use MVS as one of their key subcontractors so it is possible, that at some time, your repairs may have come to Mark via MAN, MaK, Mirrlees, Wärtsilä/Sulzer, Rolls Royce/Bergen, Daihatsu, Yanmar, and HimSen for example.We also have considerable experience on the high speed engines such as Caterpillar, Cummins, Volvo/Mitsubishi, Deutz, MTU, MWM engines as well and often keep in stock spare crankshafts/ blocks etc.

The following main services are offered

  •  Crankshaft grinding and reconditioning after many hours of general wear and tear
  •  Heat treating and straightening following catastrophic crankpin and main bearing failure
  •  Routine reconditioning of all types of connecting rods and marine head bearings
  •  Line boring of engine bedplates both in situ and in the workshop
  •  Hard Chrome plating (HCP)
  •  Laser cladding
  •  White metal re-babbitt by centrifugal means
  •  Spare parts and capital items (crankshafts, connecting rods, engine blocks,
  •  OEM new spares (particularly for our reconditioned crankshafts)
  •  Our processes are IACCS Classification approved by Bureau Veritas and Russian Register and additionally if required other IACCS surveyors regularly attend our workshops.

 
Due to the very specialise nature of this business Mark has a long term strategy of investing in skilled craftsmen, training and in appropriate technology.

For example MVS have two laser cladding machines in operation that have been used to recondition CPP propeller shafts, large propulsion gearbox shafts, CPP propeller blades and hubs.

As vessels become larger it seems that the auxiliary engines become smaller for ever increasing power densities and when operating on HFO are subjected to higher rates of crankshaft and bearing wear.

As a result MVS has catered for these smaller Heavy fuel burning engines that had previously been considered unrepairable.

For example we successfully repair Daihatsu DC17*(Soft shaft hB 240) crankshafts that can typically be worn over limits after only 30000 hrs.  This is done by pre grinding and then Hard Chrome plating back to standard size.  The process not only allows the operator to continue using the original crankshaft with standard bearings but extends lifetime cycle due to the improved durability of the HCP surface.

Another typical small HFO auxiliary engine is the Holeby 16/24 that is usually licence made by STX or Doosan.  This engine operates at 1200 RPM and is subject to high levels of wear and tear.

We regularly re grind the crankpins and main journals and can provide Under Size bearings from our stock thus saving the Owner/Manager from purchasing replacement crankshafts

Mark restores over 400 crankshafts per annum (of which a minimum 50 are specially heat treated). We use special heat treatment techniques to rectify hardness with minimal loss of material, resulting in a perfect shaft repair.

Crankshafts can be divided into two categories (Namely Soft and Hardened)

Soft (Typically hB 250-280) and hardened crankshafts (Typically >hB 600)

Soft shafts (usually from MAN, MaK, Mirrlees, Wärtsilä/Sulzer, Rolls Royce/Bergen) when subjected to severe heat as well as oil quenching during a bearing failure, can locally raise hardness to >600hB. However in spite of this, can in most cases, be repaired in our workshop by heat treating, a process that reduces the hardness to a maximum of hB300.

This heat treatment process can only be made 100% in the workshop and is an essential process that reduces the amount of metal that has to be ground away when correcting wear and tear tolerances.

It is common that the shaft bends during a typical failure so our expertise allows us to also correct this problem during repair.

The above processes cannot be adequately dealt with when the crankshaft is still in the engine.

Hardened shafts are normally made by the Japanese companies Daihatsu and Yanmar as well as Caterpillar.

The process affords a very durable surface that can last >100,000 hrs before machining to 1st undersize

Daihatsu though have also supplied some engine models with soft crankshafts as with the above small DC17 and some engine models used for propulsion.

In spite of this bearing failure occur due to contaminated lube oil and connecting rods distorting beyond Makers tolerances.

In this the hardness figure does the opposite to Soft shaft failure i.e. it goes soft.  Moreover often deep cracks develop that make the shaft irreparable by conventional means.

However if it is possible to remove surface cracks we then offer HCP as mentioned above.

Connecting rods

Our bread and butter work is reconditioning of conventional two piece connecting rods as well as the three piece Marine head type.

Nowadays many connecting rods can go out of tolerance after just 20,000 running hours and as a result often cause crankpin bearing failure.

This short life is caused by micro movement between the cap and the rod (call fretting) and is accelerated when the serrated contact points are not correctly mated.

However at MVS, with our superior techniques and skills, we can not only rectify this problem but return the connecting rod to the Owners with superior 100% contact at these connecting surfaces.

We do not employ heat or any welding processes during the repair and all dimensions and tolerances are returned to Makers original standards.

 

Feel free to contact us when others reject your crankshaft or other parts. Often we are able to offer a repair solution. Check our website: www.markvanschaick.nl

Mark van Schaick BV

Niewe Waterwegstraat 7, 3115 HE Schiedam, The Netherlands, Harbour no. 535 (Port of Rotterdam)

Phone: +31 - 10 - 409 05 99

E-mail: info@markvanschaick.nl

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# 2(60), 2017
Shipbuilding