I recently want to use high-strength axis with 12t metal pinion, But they just can’t fit. It is way too tight to insert high-strength axis into 12t metal pinion. I try several different high-strength axis and12t metal pinion. None of them can fit each other Anyone has a similar issue. Am I just bad luck to get the faulty ones.
The picures show how far I can insert high-strength axis unless I use hammer.