Office Chair Parts

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Office Chair Parts

If you have ever taken a close look at your office chair, you may have asked “What is that thing called?” or “I wonder what that does?” Well, question no more… our office chair parts guide takes the mystery out of your most basic chair parts. Once you find out what each chair part is, we’ll teach you how to adjust them at our office chair adjustment guide here.

Office Chair Parts

Replacement Parts Herman Miller office chairs are built to last, even if that means that occasionally, they outlast some of their parts. That’s why we’ve made it easy for you to find and install Herman Miller replacement parts for your chair, including casters for most Herman Miller office chairs and replacement armpads specifically for classic Aeron Chairs and Stools. You’ll also find two unique back support options that can enhance the ergonomic benefits of your classic Aeron Chair.

Office Chair Parts

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Herman Miller office chairs are built to last, even if that means that occasionally, they outlast some of their parts. That’s why we’ve made it easy for you to find and install Herman Miller replacement parts for your chair, including casters for most Herman Miller office chairs and replacement armpads specifically for classic Aeron Chairs and Stools. You’ll also find two unique back support options that can enhance the ergonomic benefits of your classic Aeron Chair.

Office Chair Parts

Start the repair by flipping it upside down on your workbench. Then remove the spring retaining clip on the bottom of the pedestal (Photo 1). Next, lift the entire pedestal and column off the chair. Lift off the bearing, washers and rubber bumper and keep the parts together for reuse. Remove the telescoping trim bezel (Photo 2).

Office Chair Parts

Casters are pivoting rollers attached to the bottom of the chair to allow it to move easily. They are often referred to as the chair’s “wheels,” but a wheel is just one component of a caster. A caster is made up of a wheel within a mounted frame, or fork. Casters should be selected based on the user’s flooring:

Office Chair Parts

To reassemble, just push the tapered end of the cylinder into the chair seat and install the telescoping trim bezel. Slide on the rubber bumper. Then lubricate the bearing with grease and install it back on the piston rod with the original washers. Next, slide the pedestal base and column over the rod and secure the piston rod with the washer and spring clip. Finish the job by turning the chair right side up and bouncing on it a few times. Your weight will drive the tapered gas cylinder into the seat retainer. Then raise the lift mechanism to the proper height and get back to work.

Office Chair Parts

Next, measure the wheel diameter. If you want the chair to push back easier or roll over small items on the floor rather than get stuck, buy a caster with a larger wheel. Buy a urethane tread caster for wood (and composite), tile or vinyl floors. But if the chair will roll on carpet, buy a hard rubber or nylon tread caster.

Most office chairs use a twin-wheel grip-ring style caster. The grip ring compresses and snaps into a groove in the socket. The easiest way to remove a grip-ring caster is with a flat bar (Photo 1). Before you buy replacements, measure the width and height of the stem. The most common widths are 3/8 in. and 7/16 in. There’s only a 1/16-in. difference between the two, so measure carefully! If you try to fit a 7/16-in. stem into a 3/8-in. socket, you’ll crack the socket.

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