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Silver metal gas lift cylinder with tapered shaft and black piston, 6.3 in length

BFKK

BFKK Office Chair Hydraulic Cylinder Replacement 6.3 in

SKU CH-PHNZ-TS7DB

A 6.3 inch hydraulic cylinder replacement supporting up to 440 lbs for office and computer chairs

  • Product typeChair & Furniture Accessories
  • SGS tested and BIFMA certified for safety
  • Supports up to 440 lbs for heavy-duty use
  • 3 inch stroke fits most office chairs
  • High-quality thickened steel ensures lasting durability
  • Integrated depth springing protects the spine when sitting

Office Chair Gas Cylinder Replacement

This 6.3 in hydraulic cylinder replaces the worn lift mechanism on most office, executive and computer chairs. It restores smooth height adjustment so the seat moves up and down without sticking or sinking. The part fits standard chair bases and mechanisms without modification.

Thermals Noise and Power Draw

The gas lift operates without electricity, fans or moving fluids that generate heat, so it adds no thermal load and produces no audible noise during use. There is no power draw to consider because the cylinder is a purely mechanical component. Normal use consists only of occasional height changes initiated by the user.

Weight Capacity 440 lbs

The cylinder is rated to support up to 440 lbs, making it suitable for heavy-duty daily seating. Buyers who need a higher load rating or a different stroke length will not be served by this model. The integrated depth springing provides a cushioned sit-down action that reduces spinal impact.

How it compares

Measured against everything we stock in Office Desks, Chairs & Monitor Arms, at today’s prices. Recalculated every night.

Price $42.99
Cheaper than about 88% of the 5,255 comparable items (median $235.99).

Specifications

Product
Product typeChair & Furniture Accessories

Questions about this item

How do I install the 6.3 in gas lift cylinder without damaging the chair base?

Tip the chair onto its side, tap the base off with a rubber mallet, clamp the old cylinder top with a pipe wrench, twist and pull it out, remove the orange cap from the new cylinder, insert its bottom into the base centre, then lift base and cylinder together into the mechanism so they lock automatically.

What maintenance will the cylinder need after installation?

No routine maintenance is required; the sealed gas spring is designed for the life of the chair, and only a future loss of height-holding would indicate replacement is needed.

At what weight does the 440 lb rated cylinder reach its limit during sustained use?

The cylinder is tested to support up to 440 lbs; continuous loads at or above that level will cause it to lose height-holding first.

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