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Escapement Dynamics

Swiss Lever Escapement Dynamics: Total Lift Angle, Draw, and Friction Tribology

The transmission of mainspring torque from escape wheel teeth to the balance roller via jeweled pallet stones.

By Antoine Perret, Escapement Specialist October 01, 2026 • 8 min read
Swiss Lever Escapement Dynamics: Total Lift Angle, Draw, and Friction Tribology

Draw Angles and Banking Pin Security

The pallet fork's locking face is angled at 12 to 15 degrees to generate draw, holding the fork firmly against banking pins during free oscillation.

Combined 52-Degree Lift Angle Geometry

Impulse faces transmit mechanical energy through a combined 52-degree lift angle split between pallet gems and the balance impulse roller.

Surface Tension Barriers and Lubricant Stability

Application of epilame surface tension barriers prevents low-viscosity synthetic oils from migrating away from rapid impulse surfaces.

⚠️ Technical & Safety Verification

The empirical methods outlined in this study reflect verified precision mechanical horology & balance spring metrology protocols and field measurements. Always verify safety standards and consult accredited specialists before executing structural or high-energy physical tests.

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