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Silver metal gas lift cylinder with black accents, 285 to 425 mm stroke, 50 mm base diameter

BFKK

BFKK Class 4 Gas Lift Cylinder 285-425 mm 1000 lbs

SKU CH-K68M-VCJY6

Universal Class 4 gas lift cylinder fits 99% of office chairs with a 50 mm centre hole, extends 285–425 mm, supports 1000 lbs and passes 120000 BIFMA cycles

  • TypeChair & Furniture Accessories
  • Fits 99% of standard chairs with 50mm centre hole
  • Supports up to 1000 lbs with Class 4 steel construction
  • BIFMA tested to 120000 cycles for lasting reliability
  • Adjusts smoothly from 285mm to 425mm travel range
  • Installs in minutes with included gloves and no extra screws

Universal Replacement Cylinder

This BFKK Class 4 gas lift cylinder replaces the pneumatic piston on most office, task, executive and salon chairs. It fits any chair base with a standard 50 mm centre hole and extends from 285 mm to 425 mm. The unit is rated for 1000 lbs and has passed 120000 BIFMA lift cycles.

Suits Standard Chairs Only

It suits owners of standard chairs with a 50 mm mounting hole who need a quiet, 360-degree swivel and smooth height adjustment. Buyers with non-standard base sizes, proprietary mounting patterns or integrated seat mechanisms should look elsewhere.

1000 lbs BIFMA Rating

The cylinder is certified to BIFMA standards at 1000 lbs after 120000 continuous lift cycles. This single rating confirms whether the part will safely support the intended user and chair combination.

Highlights

  • Fits 99% of standard chairs with 50mm centre hole
  • Supports up to 1000 lbs with Class 4 steel construction
  • BIFMA tested to 120000 cycles for lasting reliability
  • Adjusts smoothly from 285mm to 425mm travel range
  • Installs in minutes with included gloves and no extra screws

Specifications

TypeChair & Furniture Accessories

Questions about this item

How can I confirm the gas lift cylinder is functioning correctly after installation?

The cylinder should extend smoothly from 285mm to 425mm, hold your weight up to 1000 lbs without sinking, and allow 360-degree rotation without noise or resistance.

What components are included and what must I supply myself?

The package includes the Class 4 gas lift cylinder and protective gloves. You will need a rubber mallet to remove the old cylinder from the chair base; no screws or additional hardware are required.

Which chairs are compatible with this 50 mm centre-hole cylinder?

It fits 99% of standard office, task, executive, salon chairs and rolling stools that have a 50 mm (2 inch) centre hole in the base. Measure your chair base before purchasing to ensure compatibility.

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