: Highly regarded for specialized automation and tooling components. It offers a huge range of configurable parts that are often difficult to find at other retailers.

For vehicle-specific gears (transmission, differential, or timing sets), specialized auto parts stores are more effective than general industrial suppliers.

: Widely considered the best for value , offering near-wholesale prices on a massive catalog of automotive gears and parts.

: A specialist in small-scale mechanical components, including miniature gears. Experts often recommend their eStore for high-precision needs.

“For smaller stuff try the Stock Drive online store... Hey I just went to Boston Gear and they link to the catalogs through the literature section.” Practical Machinist · 11 years ago

When buying gears online, your best choice depends on whether you need professional-grade mechanical components, hobbyist robotics parts, or specialized automotive gears.

If you are working on a smaller project or need lighter materials like plastic or small metal gears, these sites offer better value.