Oem Manufacturer Sales Hydraulic Cylinder 80-56-90 with Water-Cooled Circulating for Heavy-Duty Applications Synchronized Control Cylinder Good Hydraulic Cylinders – We Make Sure Inside Parts
The tube follows GUOYUE CD250 style.
Tube steel can be 45#, 42CrMo, or 27SiMn.
Hole is ground to H8 and feels smooth, Ra under 0.4 μm.
Head, base, ears, and piston are only 45# steel.
We do not use cast iron or cast steel. Slow-Down Parts
You can pick fixed bumpers or floating bumpers so the rod slows down safe at any speed or load. Welds
We hit every heavy-load weld with ultrasound.
This takes away most of the stress and makes the weld last longer. Seals
We only use top seals from NOK (Japan), Trelleborg (Sweden), Merkel and GP (Germany).
We do not use local seals. Checks
Each cylinder is tested to GB/T15622-2005 and our own Q/GAKY014-2023.
You get a test sheet and a pass paper. Promise
We give one year cover from ship date.
If it breaks because of how we made it, we fix or swap it for free.
This cylinder is strong. It uses thick steel and hard rod. It does not bend. The seal keeps oil in, no leak. It has many tubes that slide out one by one. It lifts high but stays short Advantages:
She’s the cool-headed big sister you want on the hottest days. A built-in water-cooling jacket keeps the oil chilled like mountain spring water, so seals stay soft and smiles stay wide. Synchronized ports let two or more cylinders waltz in perfect step—no jerky dance, no bruised cargo. OEM dimensions mean she drops straight into your frame, no late-night cursing, no extra shims. From 80 mm bore to 90 mm stroke, every millimeter is forged for brute kindness, ready to shoulder the worst loads while whispering, “Easy, I’ve got you” made-in-china.com . Application scenes:
Picture a steel mill at noon: glowing slabs glide along, and these cylinders lift in unison without breaking a sweat—or a sweat bead on the operator’s brow. Or a floodgate silently yawning open at dusk, twin rams moving like oarsmen rowing the same tide. From mining shovels biting red earth to hydro gates taming mountain snowmelt, they turn rough work into a calm heartbeat. Wherever heavy meets heat and harmony matters, they’re already there, keeping the world level and the crew smiling.

item	value
Warranty	1 Year
Showroom Location	not have
Brand Name	Guoyue
Place of Origin	China
	Jiangsu
Pressure	1MPa
Structure	V
Weight	27
Power	10MPa
Dimension(L*W*H)	500*140*140mm
Rod Diameter	56mm
Maximum Stroke	90mm
Outer Tube Diameter	100mm
Inner Tube Diameter	80mm
Product name	Hydraulic Cylinder
Material	Stainless Steel
Usage	Machinery