Rugged Welded Through-Hole Hydraulic Cylinder

Hatch cover actuators and anchor windlass cylinders must be bolted directly into structural steel cavities. Through-hole mounting is the only viable solution in these spaces.

Concealed door-panel installation in rolling stock requires compact through-bolt mounting to avoid bracket protrusion into passenger space.

Safety gate and barrier actuation systems benefit from the side-lug design's resistance to vibration-induced loosening under cyclic loading.

EVER POWER's through-hole cylinder program provides full flexibility in boss position, bolt diameter, and boss protrusion height — parameters critical to achieving a flush installation in structural cavities. Our 60,000 m² facility includes dedicated boss-welding fixtures that hold positional tolerance to ±0.5 mm relative to the cylinder axis, ensuring bolt-hole alignment without field shimming. Custom epoxy coatings rated to 1,000 hours salt-spray (ASTM B117) are available for marine and offshore environments. With ISO 9001:2015 certification and 3,000+ global project deliveries, EVER POWER has the track record to support your most demanding through-hole cylinder requirements.

• Boss position tolerance: ±0.5 mm to cylinder axis
• Salt-spray rated epoxy topcoat available
• Custom bolt diameter and protrusion height
• Marine and offshore configuration expertise

“Installing these through-hole cylinders into our hatch actuator frames was completely straightforward. The boss alignment was spot on — no adjustment needed at all.”

— Systems Engineer, Offshore Deck Equipment Supplier, Norway

“The 1,000-hour salt-spray coating option gave us exactly what we needed for our coastal rail installation. Two years in service, zero corrosion.”

— Project Engineer, Rolling Stock Manufacturer, UK

A: Yes. Mid-barrel boss placement is a standard custom option. Provide your required boss-to-rod-end distance on your inquiry and our engineers will confirm structural feasibility.

A: A flange mount requires an external bracket surface for bolting. A through-hole design integrates mounting boss holes directly into the cylinder barrel, enabling installation inside structural cavities where no external bracket surface is available.

A: Yes. DLC rod coating is available as a chrome-free alternative for applications with chemical exposure or where environmental regulations prohibit hexavalent chromium plating.

A: We accept prototype orders from 1 unit. Tooling costs are amortized over the first production batch. Contact our engineering team for a no-obligation discussion of your project requirements.