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Black metal office chair gas cylinder with silver piston rod, 2 inch outer diameter

BFKK

BFKK 6 Inch Stroke 450lbs Class 4 Gas Lift Cylinder

SKU CH-WXAM-TT1HW

A 6-inch stroke, Class 4 gas lift cylinder supports 450 lbs and fits standard 50 mm chair bases with a 2-inch outer diameter

  • TypeChair & Furniture Accessories
  • Supports users up to 450 lbs with Class 4 durability
  • 6 inch stroke adjusts height from 12.4 to 18.3 inches
  • Universal 50 mm base fit works with most office chairs
  • Smooth 360 degree rotation and quiet pneumatic lifting
  • Installs in minutes without extra screws using a rubber mallet

Universal Chair Cylinder Replacement

This Class 4 gas lift cylinder replaces worn pistons on office chairs, task chairs, executive chairs, salon chairs and rolling stools. It fits any base with a standard 50 mm centre hole and a 2 inch outer diameter. The 1.1 inch inner diameter matches common chair mechanisms. Buyers who need a non-standard mounting pattern or a different stroke length cannot use this part.

Sustained Load Behaviour

Rated at 450 lbs, the cylinder meets BIFMA Plus quality standards for heavy duty use. It maintains consistent lift force across the full 6 inch travel range without fading under continuous weight. The hydraulic pneumatic design operates smoothly and quietly through 360 degree rotation. Users who require a higher weight capacity or a locking height position will not find those features here.

Critical Fit Specification

The compressed height is 12.4 inches and the fully expanded height reaches 18.3 inches. These two dimensions decide whether the cylinder matches your chair's required seat height range. Measure your existing cylinder before ordering to confirm compatibility.

Highlights

  • Supports users up to 450 lbs with Class 4 durability
  • 6 inch stroke adjusts height from 12.4 to 18.3 inches
  • Universal 50 mm base fit works with most office chairs
  • Smooth 360 degree rotation and quiet pneumatic lifting
  • Installs in minutes without extra screws using a rubber mallet

Specifications

TypeChair & Furniture Accessories

Questions about this item

How quietly does the 360-degree rotation operate during all-day use?

The gas lift cylinder is designed to lift and rotate smoothly and quietly, so it should not disturb anyone while you work.

Which chair bases will accept the 2-inch outer diameter and 50 mm centre hole of this cylinder?

It fits most office, task, executive, salon chairs and rolling stools that have a standard 2-inch centre hole in the base.

Will the 1.1-inch inner cylinder work with the existing mechanism on my older chair?

The universal size is made to replace standard gas cylinders, and installation typically takes about five minutes with a rubber mallet and no extra screws.

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