Shaft Lines - Design and Manufacture
Our shaft lines adhere to the standards set by various Naval Registers. Upon request, we can provide a test certificate from the selected Register.
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Standards and Specifications for Naval Shaft Lines
COMPONENT MATERIALS LIST:
- Tail shaft options: AISI 304, AISI 316, V174, Marinox 25.
- Steel stern tube: Fe 55.1 – Fe510 – S355 – E355 steel tube with a C.30 stuffing box head.
- Bronze stern tube: Ot.Man alloy for both astern and forward heads, and tube choices of OT 63 stainless steel.
- Bearing options: Hydrolubricated rubber or Fibroid 922 (antifriction metal available upon request).
- Flange: Forged C.45 steel, normalized.
- Fasteners: stainless steel for stud bolts, nuts, and dowels.
- Ot.Man alloy specs: Rm 510 N/mm2 breaking load, Rp0.2 200 N/mm2 yield, 22% A5d elongation.
- Mibral alloy specs: Rm 650 N/mm2 breaking load, Rp0.2 245 N/mm2 yield, 16% A5d elongation.
- Duplex.
- GRP Epoxy Fiber Horn Tubes.
- Vulkan, PSS, ERCEM type seals.
DIMENSIONS:
- Stern tube closing length (B) is customizable.
- The ‘G’ dimension should be specified by the customer if the shaft is directly linked to the reverse/reduction gear.
- For an intermediate shaft, customers should provide the distance from the inside block to the reverse/reduction gear flange.
BEARING LUBRICATION: Lubrication is achieved through the natural circulation of water. Water enters via a dedicated sea water intake and a straight, short tubing into the stern-tube’s water inlet. The tubing’s section should be at least twice the size of the inlet hole, and water stop gates are discouraged
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Naviensis has over 50 years of experience in providing high-efficiency and reliable maritime propulsion solutions. Feel free to contact us for more information.
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