Office Chair Tilt Mechanism Plate with Lever & Tension Knob – Replacement

Replace a broken or worn-out seat plate with this steel tilt mechanism. It fits under the seat of most office and revolving chairs and gives you smooth height adjustment, a comfortable tilt, and a knob to set how easily the chair rocks back.

Features

• Strong black powder-coated steel plate
• Lever controls the gas lift for height adjustment
• Tension knob to make tilting lighter or firmer
• Standard 28 mm socket fits most office chair gas lifts
• Slotted mounting holes for easy fitting to most seats

Dimensions

• Plate size: 255 × 205 mm
• Mounting hole spacing: 220 × 170 mm
• Mounting slots: 25 × 8 mm
• Gas lift socket: 28 mm
• Overall height: 90 mm
• Tension knob: 50 mm diameter × 45 mm
• Lever rod: 8 mm, handle 110 mm

Before ordering: measure the hole spacing under your seat and check it matches 220 × 170 mm.

Seat, gas lift and screws are not included.

Frequently Asked Questions

Will this plate fit my chair seat?
Check the screw-hole spacing under your seat. This plate fits a 220 × 170 mm hole pattern, with slotted holes for some adjustment.

What does the tension knob do?
It sets how easily the chair tilts back. Turn it one way for a lighter tilt and the other way for a firmer tilt.

What does the lever do?
The lever presses the gas lift button so you can raise or lower the seat height.

Are screws, seat or gas lift included?
No. Only the tilt mechanism plate is supplied.

Replacing more parts? See the hydraulic gas lift and the 5-star chair base, or browse all office chair spare parts.

Sold by The Royal Safe Company — office furniture maker since 1934.

• Feet flat on the floor, knees at about 90° — check the seat height against your desk.
• A mesh back keeps you cooler through long working days.
• Use tilt-and-lock to recline on calls and sit upright to focus.
• Armrests should let your shoulders stay relaxed.