Lightweight journal support pin
A journal support pin to support intermediate gears for use in gas turbine engine comprises a titanium body, and an outer surface outside of the titanium body having a surface hardness that is harder than the body. A gas turbine engine and a method of forming a journal support pin to support intermediate gears for use in gas turbine engine are also disclosed.
1. A method of forming a journal support pin to support intermediate gears for use in a gas turbine engine comprising:
providing a titanium body, and
enveloping an outer surface outside of said titanium body with a material having a surface hardness that is harder than said titanium body;
wherein said material is provided by a steel sleeve;
drilling pin holes through the material and into the titanium body;
inserting pins into the holes;
welding the pins to at least one of the material and the titanium body; and
wherein oil supply holes extend from a central bore in said body through said surface.
2. The method as set forth in claim 1 , comprising:
drilling oil supply holes through said material and into said titanium body to a depth of a central passage in said titanium body.