Casting

CJR's foundry team has the combined benefits of over 150 years experience in the industry. This experience coupled with our excellent software, tooling and patterns provides an extremely efficient and highly productive output of quality castings. 

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Our Foundry

The fully licensed foundry utilise electric furnaces with power supplied by our own on site 500kva 3 phases generator. This clean approach to melting metal achieves the 1280 degrees C required for AB2 in less than 30 minutes.

 

Low Emissions

The company takes a responsible attitude to environmental issues and closely controls and monitors these to a level that is only a small fraction of the EU emission limits.

 

Sand Reclamation

Added to this is our reclamation unit which recovers and re-uses nearly 80% of the sand needed which eases the burden on the world's expensive and limited landfill sites.

 

Casting Analysis

Density modelling through digital software simulates the casting process ensuring the most appropriate runner and risers systems are being used. What’s known as the ‘draw’ of the metal as it cools can result in porosity (air holes) in the casting, which can weaken the product, and at the surface of the metal even affects performance. Our software enables our highly skilled foundry technicians to prove out their theories without the expensive of true life trial and error.

Flow modelling allows us to simulate the effects of how the molten metal flows into the mould. Unlike the un-scientific methods still favoured by many foundries CJR  is committed to ensuring the very best results are achieved every time. The software gives us that otherwise unavailable insight into making sure the integrity of our castings isn’t compromised by an inefficient or uneven flow which could cause turbulence leading to unsound structural integrity.

  • Bearings

    Suitable bearings are required in stern tube and rudder tube assemblies.

  • CJR Propellers

    Every boat is different and the first sign of this difference can be seen in propeller operation.

  • Couplings

    Couplings are the elements that transfer torque from gearbox to the shaft and because of their role they are under strict supervision of class societies.

  • Ducted Propellers / Nozzles

    CJR can offer ducted propellers systems including any type nozzles and impellers under full IACS approval.

  • Rudder Tubes Assemblies

    CJR manufactures rudder tube assemblies designed for hull trough installation to suit stock diameter from 30mm up to 180mm.

  • Rudders

    Rudder profile and sections are carefully selected to specific regime of the flow around sterngear.

  • Shaft Brackets

    Our shaft brackets are designed bespoke to achieve optimum performance in line with every vessel individual requirements.

  • Shaft Seals

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  • Shafts

    Shaft design starts from designing entire shaftline incorporating all the components from the propeller to the gearbox and including the bearings to make the system safe, vibration free and efficient in operation.

  • Stern Tubes / Shaft Logs Assemblies

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  • Tie Bars

    Tie bars connect both rudder tillers on twin rudder boats to simply synchronise them together.

  • Tillers

    Tiller is important part of steering gear which design is covered by strict rules of classification societies when the boat is built under class.

  • Shaft Alignment

    Using laser technology and precision engineering a bespoke shaft alignment tool has been developed to aid the boat builder’s task of accurately fitting and aligning the stern gear.

  • PropSmith

    For the fast, simple and precise installation and removal of propellers, PropSmith is the professionals’ choice.

  • TrialDAS

    TrialDAS is a new data acquisition system specifically tailored for monitoring sea trials. The system is based on rate gyros, GPS, accelerometers and magnetic field sensors to record every movement of the boat.

  • Keyless Hub Hydraulic Kit

    Quick and convenient method of pushing and releasing large propellers or couplings to and from the keyless shaft cone.

  • Hydraulic Propeller / Coupling Pusher / Puller

    Quick and convenient method of pushing and pulling propellers or couplings to and from keyed shaft end.

  • TrialsAPP

  • Quality Policy

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  • Design

    We don’t only make propellers, we analyse entire propulsion system of each boat starting from hull resistance prediction and hull propulsive factors.

  • Pattern Making

    Precise pattern assures high accuracy of final product and it is one of the most important stages in manufacturing process

  • Casting

    CJR's foundry team has the combined benefits of over 150 years experience in the industry.

  • Machining

    CAD/CAM controlled machining of the cast propellers, P brackets and rudders are undertaken to the fine tolerances of their original design

  • Finishing

    Our processes ensure that the geometry of our finished castings is always true and accurate to the original design.

GET IN TOUCH

Contact Us
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CJR Propulsion Ltd
70-72 Quayside Road
Bitterne Manor
Southampton
SO18 1AD
United Kingdom

Tel: +44 (0)23 8022 2032
Fax: +44 (0)23 8021 1832

info@cjrprop.com