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Main Propulsion Shafting
COLLINS MACHINE WORKS Performs All Machining Operations on Main Propulsion Shafting
Machining, Removal and Installation of Shaft Sleeves
Straightening, Re-Machining and Micro-Honing
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This lathe is one of the largest on the east coast. It is 65 feet between centers and swings 130 inches.
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Fitting
Final Blue Contact Check of the Taper
Main Propulsion Shafting to Propellers
To Military, ABS and Lloyd's Standards
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Welding
Stainless Steel Weld Build Up
Submerged Arc
Spray Metal
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This shaft is 43 feet long and weighs 30 tons. The journal has a diameter of 25.5 inches.
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Stress Relieving
Following the welding operation, these portable gas fired furnaces are mounted on our lathe and the shaft is heated to 1200 degrees Fahrenheit in order to stress relieve it. The shaft is rotated during the entire process in order to prevent it from bending.
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Propellers
Our large Horizontal Boring Mill allows us to machine all sizes of propeller blades and hubs.
This picture illustrates the machining of the palm face of a controlled pitch propeller blade. The twin screw ship that supplied this propeller blade was 980 feet long. The piece was one of ten propeller blades from (2) 5-bladed hubs.
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Rudders and
Rudder Stocks
Various In-Shop or On-Site Machining Operations
This portable machine is boring a tapered fit with a diameter of 29.5 inches at this large end, a 2 inch taper per foot and is 70 inches long.
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