Office Chair Caster Installation

Office chair caster installation can be achieved through DIY caster installation or alternative mobility solutions, depending on the chair material and specific needs.

I. DIY Caster Installation

1. Cost and Component Selection
The primary cost involves purchasing caster components. Universal casters range from 1.71 yuan to 5.0 yuan each, with a standard chair requiring five casters, totaling approximately 10 yuan to 25 yuan. If a headrest needs to be added, a universal headrest frame costs around 26.0 yuan. Components must meet load-bearing requirements: Nylon/rubber casters (with mounting plate style) should have a load capacity exceeding 20% of the user's weight to prevent damage during use.

2. Installation Steps and Precautions

• Modern Office Chairs: Most can directly snap new casters into the five-star base slots. Before installation, check if the slots match.
• Wooden Chairs:
  • If the chair leg bottom is flat, choose flat-mount casters and secure them with screws.
  • If there are no pre-drilled holes, use stem casters: Drill a vertical hole in the center of the leg (common diameters are 10mm and 12mm), tap in a bushing, and insert the caster.
  • Wooden chair legs should be reinforced with metal bands to prevent cracking at the mounting holes.
  • Ensure all casters are at the same height to prevent chair wobbling.
• Special Reinforcement Solutions: Some solutions recommend removing the original fixed base and securing casters to the chair leg bottoms with bolts (one caster per leg, with an optional fifth caster at the center for enhanced stability).

II. Alternative Mobility Solutions

1. Slip Pad Solution
Attach felt pads or secure silicone sleeves to the bottom of the chair legs, suitable for minor movement on carpets. This solution is low-cost and requires no chair modification but has limited mobility range and smoothness.

2. Mobile Base Grafting
Purchase a used swivel chair base (average price on second-hand platforms: 40-80 yuan) and attach the original chair seat to the new base using an adapter plate. Note:

• Ensure the adapter plate size matches the original chair. It is recommended to bring the original chair dimensions when purchasing.
• After grafting, test stability to prevent tipping due to center-of-gravity shifts.

III. Installation Tips for Special Models

For the T37 hollow-out computer chair, align the tray arrow with the front of the seat cushion during installation, and position the backrest against the seat cushion holes (align one side of the holes with the backrest protrusion for snapping in). After installation, loosen the rocking knob to enable front-to-back seat adjustment. Components include mounting tray screws (6x18), etc., and installation should follow the instructions step by step.