Marine Rudder Stock

Marine Rudder Stock

Application

The rudder stock refers to the shaft on which the rudder blade rotates, which is used to bear and transmit the force acting on the rudder blade and the force of the rudder to the rudder turning device. Its reaction force makes the ship steer. The rudder stock should have sufficient strength. The section with the largest bending moment on the rudder stock is at the lower rudder bearing, so the diameter of the rudder stock at the lower rudder bearing is generally determined first. For double fulcrum rudders, it may gradually decrease downward from the top edge of the rudder blade, but should not be less than 0.75 times the diameter of the rudder stock at the lower rudder bearing. For single fulcrum suspended rudder, the diameter from the top edge of the rudder blade downward may be reduced to 0.4 times the diameter of the rudder stock at the lower rudder bearing. Convective rudders are to be of equal strength when vertical bulkheads are used instead of the rudder stock.

At the same time, for rudders that are not in the propeller wake (rudders on barges, middle rudders with two propellers and three rudders), the calculated value of the diameter of the rudder stock is reduced by 10%. The rudder stock should be made in one piece. If flange connection is used, the strength of the bolts should be calculated. For ships sailing in the rapids section and the perennial drift wood section, the diameter of the rudder stock should be increased by 5% according to the calculated value.

For more rudder stock information, please click here.

Advantages and Features

1. Material:stainless steel,forged steel,alloy steel.

2. Test:100% ultrasonic flaw detection test.

3. Delivery time:according to the quantity and size.

4. Can be approved by CCS, BV, RINA...

Class certificates can be provided upon request

Forged Parts	Marine Rudder Stock
Material	carbon steel, stainless steel, alloy steel.
Dimension	according to you requirements
Application	ship, boat,marine
Inspection	chemical composition; UT,MT; mechanical property; dimension check
Standard	ASTM, ASME, DIN, JIS, ISO, BS, API, EN
QC Doc	chemical composition report mechanical properties report; UT test report; heat treatment report; dimensions check report.
Forging processing	Ingot—forging—heat treatment—rough machining—UT.MT—Q+T—inspection—finishing machining—UT.MT—packing
Heat treatment	Normalized / Annealed / Quenched / tempered

Marine Rudder Stock Machining

Marine Rudder Stock Finished