When adjusting the female bearing on a 3D arm what is the proper adjustment height from arm mount base? Also, difference between a 3D and 3DR arm?
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I’ve worked with both 3D and 3DR arms in assembly, and the adjustment of the female bearing really depends on the arm model and intended load — but a good starting point is usually flush or 1–2mm above the arm mount base, allowing for proper rotation without binding. 3DR arms often have reinforced joints and slightly more robust range of motion compared to standard 3D arms, which makes them a better fit for high-dynamic applications.
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Hey Kevin,
Sorry for the late response. The height of the female bearing will depend on the cartridge height and whether you have an oil bath well or no bath at all. In our experience, the cartridge height and setup are usually the biggest factors affecting the bearing height.
Most of the time, you can make all the necessary VTA adjustments with the VTA on-the-fly. However, if you need more adjustment range, you can fine-tune it by raising or lowering the female bearing. Ultimately, the height should allow for some free side-to-side motion without anything making contact.
If that’s unclear, it might be time for a video to explain it better. 😊