Sometimes it does not fit! Like many hobby store, our parts have a ± 0.05 mm precision. It is not unusual that you order a 5 mm (± 0.05 mm) bore size pulley and a motor with a 5 mm (± 0.05 mm) shaft but the pulley just does not fit on the motor. Adjusting the bore size is a minor work many of you will do as far as you've got the right tool. We can do this job for you.
If you are not sure if you need this service, just contact us and tell us what you want to fit on what? We'll make the test.
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