Custom Heavy-Duty Hydraulic Cylinder for Gantry Crane 125mm OD

Oem 280 100-230 Rotating Hydraulic Cylinder for Hydraulic Cylinder Gantry Crane Custom Heavy-Duty 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 gentle giant with a twist in her soul. A 280 mm heart and 100-230 mm stroke let her lift, then spin 360° like a dancer who never gets dizzy. Chrome skin laughs at salt spray and factory dust, while custom bearings keep every swivel silky smooth. OEM curves bolt straight onto the gantry—no shims, no midnight swearing. Day after heavy day she murmurs, “Swing where you need, I’ll hold the sky,” and the crane hums instead of groans. Application scenes:
Picture dusk at the port: she lifts a container, twirls it over the ship’s rail, and sets it down as softly as a suitcase on a hotel bed. Or a steel yard where beams pirouette into place while sparks paint the night. From wind-turbine hubs to bridge girders, she’s the calm spin that turns brute iron into ballet.

Application	Engineering machinery, mine, shipping, metallurgy, water conservancy, offshore, agriculture, etc.
Seal	Parker, Merkel, NOK, Hallite,etc.
Paint	Red, Grey, Yellow, Black, etc.
Material	St52, CK45, 4140, Duplex2205, Stainless Steel 304/316, etc.
Certificate	ABS, Lloyds, SGS, etc.
Package	Bubble-wrap packing, then in wooden case.
Color	choose the color according to customer requirement
Core components	Bearing,Pressure vessel,Pump
Is it a standard part?	Nonstandard
Structure	Piston Type, Plunger Type, Telescopic Type,
Power	Hydraulic & Pneumatic
Brand	Guoyue
Sample	Available