What Are the Best Low-Friction Bearings for Precision Positioning Mechanisms?

Thread starter evi7538
Start date Feb 23, 2019
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Friction

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SUMMARY

This discussion focuses on selecting the best low-friction bearings for a precision rotational mechanism designed for angular positioning of an optical element. The user requires a rotation travel angle of 50 degrees with 4000 discrete positions, emphasizing high repeatability and low positioning noise. Recommendations include using high-grade low-friction ball bearings, specifically ABEC class bearings, and exploring ceramic bearings from Boca Bearing for their low coefficient of friction. Additionally, flexure-based positioning solutions are suggested as an alternative to conventional rolling element bearings due to their frictionless nature.

PREREQUISITES

Understanding of precision rotational mechanisms
Familiarity with bearing classifications, specifically ABEC ratings
Knowledge of microstepping in stepper motors
Basic principles of friction and torque in mechanical systems

NEXT STEPS

Research "ABEC class bearings" for low-friction applications
Explore "ceramic bearings" from Boca Bearing for precision mechanisms
Investigate "flexure-based positioning solutions" for high precision
Learn about "non-contact seals" and their impact on bearing performance

USEFUL FOR

Engineers and designers working on precision optical systems, mechanical engineers focused on low-friction applications, and anyone involved in the development of high-accuracy positioning mechanisms.