Marine Stern Tube
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Marine Stern Tube

The marine 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.

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Product Introduction

Material

Forging Product Size Range
Forgings	Raw Material	Min.Size (mm)	Max.Size (mm)	Min.Weight (kgs)	Max.Weight (kgs)	Heat Treatment
Shaft	Carbon steel Stainless Steel Alloy Steel	Φ30×50	Φ800×5000	0.3	20000	Normalizing; Queching; Tempering Annealing; Quenching & High Temperature Tempering
Ring		Φ75 ×Φ15×12	Φ5000 ×Φ4500×300	0.3	9000
Disc		Φ90 ×20	Φ3500 ×100	0.5	10000
Block		100 ×100×100	1500 ×1500×1500	7.85	26000
Gear Ring		Φ75 ×Φ15×12	Φ5000 ×Φ4500×300	0.3	9000
Hollow Bar		Φ90 ×Φ49×133	Φ1000 ×Φ900×3000	4	12000
Other			Φ5000	/	30000

Product Introduction

Marine Stern Tube with CCS, ABS, GL, DNV, RINA, KR, BV Certificates

The marine 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 flaw indicator.

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Name: Marine Stern Tube
Raw material: Carbon steel/ stainless steel/ alloy steel
Min size: Ø 30x50mm
Max size: Ø 1000x5000mm
Min weight: 0.30kg
Max weight: 20000kg
Heat treatment: Anneal/ Normalize/Austenitize/ Quench/ Tempering

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Advantages

1.Quality guaranteed

2.Good price

3.Strict production process

Application: Petroleum,Chemical,Marine,Drug, Mechanical 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 inspection, you could also choose a third party inspection.

Standard: ANSI,ASTM,ASME,API,JIS,DIN,BS,EN,KS,UNI,SABS,GOST.

Certificate: CCS, ABS, BV, DNV, NK, KR, LR, GL, RINA, RS, etc.

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