Marine/Ship Propeller Shaft/Stern Tube Seal for Sale

  The stern tube is normally made of cast iron slightly larger at the forward end to ease removal. The forward end is flanged and bolted to a doubler plate stiffened aft peak bulkhead. The forward end is supplied with a stuffing box and gland, the after end with a bearing comprising lignum vitae or similar, the wood is dove tailed into a brass bush, the wood is machined and cut on end grain. Can be lined with Lignum Vitae , rubber composition (cutlass rubber) or an approved plastic material (Certain plastics possess good bearing properties being inert and very tolerant of slow speed boundary lubrication conditions. Cresylic resin bonded asbestos such as Railco WA80H give good results in condition of heavy water contamination in the lubricating oil of almost 100%).
       There are two kinds of lubrication systems for the stern tube: water lubrication and oil lubrication
 
        For water lubricated bearing not less than 4 x the diameter of the steel shaft. If the bearing is over 380mm diameter forced water lubrication must be used, a circulating pump or other source with water flow indicator.

Material: steel, stainless steel
Processing methods: forged and lathe machining
Dimensions: designed according to the shaft of the vessel
Certificate: CCS, ABS, BV, DNV, NK, KR, LR, GL, RINA, RS, etc.


Marine Cast Screw Shaft/Stern Tube 
1,Quality guaranteed 
2,Moderate price 
3,Strict production process

Symmen Metal is a professional supplier to OEM of the art and innovatively engineered cast, forged and fabricated wear, abrasion and heat resistant products. We have a successful track record of supplying global mining and mineral processing, oil sands, oil & gas, steel, aluminum, cement, power and railway industries, ground engaging & heavy equipment, smelting and crushing application sectors.  
Symmen metal is committed to meeting and exceeding our customer's expectations with excellence in supplying reliable quality custom cast, forged and fabricated metal wear, replacement and abrasion and heat resistant products and value pleasing service. We continually invest in research and development to take full advantage of industry advancements in order to supply market leading and innovative new products.
Technical details of  Marine Cast Screw Shaft/Stern Tube
Type:   Marine Cast Screw Shaft/Stern Tube
Application: Petroleum,Chemical,Marine,Drug,Gas,Metallurgy,Mechanical,Food,etc...
Size:  0.025 kilograms to 40,000 kilograms (40 MT) 
Material: Our castings using Electric Arc or Induction Furnace sand Vacuum Degassing (if required) are manufactured to ASTM, AISI, DIN, JIS, SAE or proprietary standards
Quality Control: UT,MT,RT,PT,chemical composition test,mechanical property test,etc.
Heat Treatment: Normalize,Quenching,Tempering,Anealled.
Surface Treatment: painting,plating,polishing,black oxide,transparent anti-rust oil.
Inspection: Besides our in-house inspecion, you could also choose a third party inspection.
Standard: ANSI,ASTM,ASME,API,JIS,DIN,BS,EN,KS,UNI,SABS,GOST.
Certificate:  1, Raw material certificate(material chemical compositon)
                      2, Heat treatment sheet report
                      3, Dimension inspection report
                      4, UT test report

Packing:  Seaworthy plywood packaged on stell pallets or as customer's request
Delivery Date: Decided by the amount and dimensions of products. Usually we control the large diameter rings' delivery time within 5 weeks after we receive your formal order.
Competitive Advantage: Quality control and management to the whole produce process, including ingot smelting,forging, heat treatment, machining and strictly final inspection prior to delivery.

. Packaging Methord:   
    1. Wooden Csse;
    2. Iron Frame;
For different shipping methods and destinations, we will suggest different packaging. If you have any requirement for the packaging, please let me know during enquiry.
 
II. Shipping:
    We offer our clients one-stop service. The shipping tool can be by sea, by air or by train. It depends on the destination of our products. And we will suggest you the min. cost and min. damage of the products.