Customized 80 56-70 F1-7 Support Roller Lock Door Plate
Differential Oil Cylinder for Engineering Machinery Construction
Machinery 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 quiet guardian who holds the door steady. An 80 mm heart
and 56-70 mm stroke give her the gentle strength to lock the
support roller plate with precision. Differential control means she
adjusts on the fly—no jolt, no hesitation. Custom-built to fit
snugly into your engineering machinery, she slides in like a
missing puzzle piece—no shims, no swearing. Day after day she
whispers, “Hold tight, I’ve got the lock,” and the machine runs
smoothly without a hitch.
Application scenes:Picture a construction site at dawn: a massive excavator’s support
roller plate locks into place with a gentle click, thanks to her
steady push. Or a bulldozer on a narrow mountain road where she
keeps the door plate secure while the machine moves earth. From
tunneling projects to road construction, she’s the calm hand that
keeps machinery stable and safe, turning brute force into gentle
precision.
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 |
