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Given just how long Konami have been trying to bring Metal Gear Solid to the big screen, hopefully Lipovsky and Stein are finally the duo able to get the project past the finish line
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Size::One Size
The internal tooth geometry requires specialized approaches: Requires specialized internal gear cutting methods (shaping with internal gear cutters, broaching, or wire EDM for hardened gears) Limited tool access restricts cutting parameters and increases cycle times Inspection requires specialized probes and measurement protocols to access tooth flanks inside the ring Housing design becomes more complex to support the ring structure while maintaining precise alignment Despite these manufacturing complexities, the performance benefits justify the extra effort in demanding applications: Transmit 20-50% higher torques than equivalent external gears due to larger contact area from convex-concave tooth geometry Improved efficiency and reduced heat generation from lower sliding friction Exceptional accuracy (AGMA A2-A5 grades) when ground after heat treatment for aerospace and robotics applications Use Cases of Internal Gears Engineers choose internal gears when they need maximum torque capacity in minimum space: Planetary gear systems in automatic transmissions providing multiple speed ratios in compact packages Industrial gearboxes requiring high reduction ratios (10:1 to 100:1) in limited space Wind turbine gearboxes handling massive torque from slow-rotating blades Robotic joints needing high torque output with minimal weight and size Several industries rely heavily on internal gear technology: Aerospace : Helicopter transmissions, actuation systems, and auxiliary power units where weight savings directly impact performance Automotive : Automatic transmissions, differential assemblies, and hybrid powertrains Construction equipment : Swing drives for excavators, track drives for dozers and excavators Renewable energy : Wind turbine main gearboxes converting slow blade rotation to generator speeds NASA research on planetary gear dynamics documented a compelling case study
