Solidworks Geartrax [upd] May 2026

Her traditional method was manual. She’d spend days calculating parameters, building a 3D sketch of the involute curve using complex equations, then extruding and adding helical sweeps. But for the Mark VII, she needed three different gear types: a sun gear, four planets, and a fixed ring gear. The first prototype had failed catastrophically on the test rig—the teeth had interference, the stress concentrations were in the wrong places, and the dreaded "under-cut" had weakened the root of the sun gear.

She could sketch a spur gear in SolidWorks. Any freshman could. But a true, profile-shifted, root-filleted, precision-ground helical gear for a planetary system? That required mathematics that made her head spin. Involute curves, pressure angle modifications, tip relief, and backlash calculations that had to account for thermal expansion in 2°C Arctic water. solidworks geartrax

The problem was the Mark VII Actuator. It was a compact, high-torque marvel for a new generation of subsea drilling equipment. The heart of the actuator was a complex, nested planetary gear train. It needed to transmit 4,000 Nm of torque inside a housing no larger than a coffee can. Lena had designed the housing, the bearings, the lubrication channels. But the gears—the very soul of the machine—were defeating her. Her traditional method was manual

“Passed with flying colors,” he said. “How did you fix the gear geometry?” The first prototype had failed catastrophically on the

“Use the tool, Lena,” Tom said. “You’re an engineer, not a cartographer.”

She hit the button.