Chair Foot With Felt Pad (Customizable)
by vorpal, published
Customizable chair foot that has a cup to hold a felt pad! Works for any chair with cylindrical legs. Allows you to specify the angle at which the leg hits the ground for perfect contact (most are 10 degrees or so). A small retaining wall stops the felt from slipping out of place.
The felt cup allows you to place 1" diameter (or whatever size you specify) round felt pads on the chair. The cup retains the felt so it doesn't slide off.
I designed this thing because my kitchen table chairs (on tile floor) would always mark up the floor as dirt accumulated under the chair leg. Self-stick felt pads always seemed to slide off. The little plastic protectors you buy in hardware stores (the ones with a nail coming through) would eventually accumulate dirt as well, so did not solve the problem. With this thing you can keep the felt pad right where it's supposed to be, retained by the felt cup. When the felt pad accumulates too much dirt and starts scuffing the floor, it is easy to remove them from the felt cup and replace them. On my floor this only has to be done about once every 4 to 5 months for the chairs we use everyday. Less often for chairs not typically used.
There are two parts: the leg cup and the felt cup. The leg goes in the felt cup and the felt... ok too much detail, sorry.
A separate bottom and top diameter of the chair leg cup may be specified since many chair legs get thicker from the ground up. Use calipers to measure. I added 1 to 2 mm and that works well on my printer.
This is printable as-is with no extra supports in the orientation shown (see below for the meaning of the supports option).
The felt pad diameter and thickness may be changed if your pad is not a standard 1" diameter circle. The rim that retains the felt pad will be about half the thickness of the pad. That's only a couple of mm but that appears to be enough to keep it from sliding. I add a couple of mm to the diameter of the pad cup to make it easy to get the pads in and out.
You may optionally specify whether or not break away supports are automatically generated on the bottom of the felt pad. I actually printed several chairs with no support before adding this option. My printer can bridge the 1" diameter pretty well, but it comes out nicer if you add the supports. Use small pliers to remove the supports after printing.
The angle is used if your chair legs do not go straight up and down (many angle into the floor). For my chairs 12 degrees was perfect. I think most chairs will be good around 10 to 14 degrees. You do not have to be perfect here. Print one, see if it works, and if so print the rest.
Note that on my chairs there are different diameters for the front legs vs. the back legs. So be sure to measure both.
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Chair Foot With Felt Pad (Customizable) by vorpal is licensed under the Creative Commons - Attribution - Share Alike license.
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