Propeller-Shaft

Shipbuilding involves some of the largest deep hole drilling work in the manufacturing industry. Marine propulsion shafts, rudder stocks, stern tubes, and steering gear components all require precision bores through massive forgings. The marine environment adds corrosion resistance requirements that affect material selection and drilling parameters. I have worked on components for cargo ships, tankers, naval vessels, and offshore support vessels. The scale of the parts changes everything about how you approach the job. The propeller shaft work shares techniques with marine drive shaft deep hole drilling and stern tube rudder stock drilling. ...

Marine components are brutally large and unforgiving to machine. Propeller shafts, stern tubes, rudder stocks, and stabilizer fins all need deep, straight bores – often in stainless steel or monel alloys that make life hard for any cutting tool. I have drilled propeller shafts up to 8 meters long and stern tubes weighing several tons. The scale alone creates problems that do not exist on smaller parts. Here is what I have learned about keeping those jobs under control. ...

Propeller shafts are some of the largest deep hole drilling jobs you will find outside of oil and gas. A shaft for a mid-sized ship might be 6 meters long with a 150mm bore through the center. The material is usually a duplex stainless steel or a high-strength marine-grade alloy. The scale changes how you approach the job. A 6-meter shaft does not fit on a standard machine, and it does not handle like a normal part. ...