Office Chair part repair replacement mechanism, old style
Style #10, a 13 1/2" length mechanism when measured length from hole to hole. The original style mechanism used in many older style 4 leg wood office swivel chairs. Bell is 4 1/16" diameter covering the top of the 4 leg base hub plate. The rails curve outwards at each end, as was the common style.
Note there is an additional style in this length mechanism.
Style #475 13 1/2"-20 1/2", is actually intended for a 5 leg base due to the Bell size, but works perfectly well with a 4 leg base.
Also available is Style #224754, a 4 leg style that is 17 1/2" long (hole to hole) from front to back. Ideal for chairs with large heavy backs.
Click here to view if longer than 13 1/2" is needed.
Front to rear hole length 13 1/2"
Side to side hole width, 6". Threaded post is standard 1" diameter
Style #10...$97.55
Shepherd Regent style or Baron Antique Brass carpet castors are a good replacement choice in keeping with the older style appearance.