Swivel Chair Replacement Parts
COLUMN Removal from office swivel chair Bases
Most Columns in 5 star Office swivel chair bases are removable. Rarely is a 4 star Office base column removable. When replacing a Column in a Gas office swivel chair, the column diameter is measured midway at it's overall length (height) and must be the same as the replacement. It will be either 1 3/4" (45mm) or 2" (50mm). No others are available!
Removing both a Gas 
or Manual Column are identical in proceedure.
View available gas Column selection
After first removing the base from either a Gas or Manual height adjustment office swivel chair, squirt a shot or two of WD 40 at the underside of the base where the Column protrudes out the bottom. Aim where the Column and Base meet. Turn Base over and repeat at the topside of the Base and Column. The WD 40 must run down entering the tight fitting tapered joint to facillitate removal. Do this by sharply striking the side of the Column several times using a short length of 2" X 4" (14" to18" will do very nicely) or a steel hammer. The idea is to "Shock" the Column setting up a vibration which will permit the WD 40 to run into the joint. Set the Base and Column aside for 5-10 minutes to permit the fluid to penetrate into the joint.
Then, with the Base with Column underside facing you, lay the 2 X 4 flat on top of the protruding piece of the Column, strike repeatedly with medium/hard blows. Do not use a mallot. Nine out of ten can be removed in this manner...sooner or later. If you have a Ten, purchase a new Base with included Column.
It is highly recommended to replace the Style #108 Bearing Kit (each kit includes a schematic) whenever removing the base, column or gas cylinder. A #108 kit if ordered separately does not meet our required $20.00 minimum merchandise purchase.
INSTALLATION
Drop the column into the center hole of the 5 leg chair base. Do not use any tools to seat it. Using the chair only once or twice is enough to seat the taper very tightly.
