Installing The Herman Miller Aeron Back Perfectly

Installing The Herman Miller Aeron Back Perfectly

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How To Ensure Your Herman Miller Aeron Chair Back Fits Perfectly?

Encountering issues with fitting the back of your Herman Miller Aeron chair can be puzzling, but it’s often a simpler fix than it appears. Before assuming the back size is incorrect, follow our guide to ensure a perfect fit for your chair.

Tools Needed:

Steps to Ensure a Perfect Fit:

Verify the Back Size:

  • Check the size of your Aeron chair back by feeling for Braille dots under the upper lip of the back. One dot signifies size A, two dots for size B, and three dots for size C. Confirming you have the correct size back is crucial.

Inspect the Yoke and Bushing Alignment:

  • Look for any gaps between the metal yoke and the plastic bushing. A separation here is often the root of fitting issues.

Adjust the Yoke and Bushing:

  • Manually: Try to push the yoke and bushing together with your hands. This is the most straightforward approach.
  • Rubber Mallet: If manual adjustment doesn’t work, gently use a rubber mallet to tap them closer.
  • Diagonal Bolt Trick: For stubborn gaps, use a diagonal bolt approach. Start by inserting a back bolt into one corner and tighten it. Then, proceed to the opposite corner, aligning and inserting the bolt there. This method helps to realign the yoke and bushing by gradually tightening the bolts, which pulls the components together and closes the gap.

Finalize the Installation:

  • After adjusting the first two bolts using the diagonal method, the remaining bolts should align more easily. Tighten all bolts to secure the back in place. This process not only closes any gaps but ensures the back is perfectly aligned and secured to the chair frame.


Fitting issues with your Aeron chair back are often due to a misalignment between the yoke and bushing rather than incorrect back size. By following these steps, you can easily resolve the problem and enjoy the full ergonomic benefits of your Herman Miller Aeron chair. Remember, checking for a gap and applying the right method to close it is key to a perfect fit.

Aeron Aeron Back Aeron Back Replacement Aeron Classic Aeron Size B DYI Herman Miller Herman Miller Aeron How To Install The Aeron Chair

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