Hydraulic Ram Manufacturers

Zhejiang Vermillion Import and Export Co., Ltd. manufactures hydraulic rams — the cylinders that turn pump pressure into linear force — for the hydraulic tool and garage equipment lines we build, and for equipment makers who need a defined cylinder at a defined working point. A ram is mounted in a frame or attached to a boom; when the pump supplies pressure, the piston extends or retracts and produces the stroke that does the work. Our range covers the cylinders used in shop presses, shop cranes, porta power sets and the wider family of hydraulic tools and equipment, in a spread of sizes and capacities matched to different loads.

As a Hydraulic Ram manufacturer working from Jiaxing, Zhejiang, we build the cylinder and the host machine together — Hydraulic Shop Press, Shop Crane, Porta Power Jack — so a ram can be specified as a standalone component or as part of a complete tool.

The Hydraulic Ram Range and Where Each Type Fits

We group rams by the host machine they drive, because the frame, the mounting and the load path decide the cylinder more than a tonnage figure on its own. Each family below is produced in a range of sizes and capacities so the force can be matched to the actual job rather than rounded up to the nearest stock size.

Cylinder Configuration: Bore, Stroke and Action

A ram is defined by a small set of numbers, and each one is a decision rather than a catalogue default. We start from the working point — the force required at the tool, the distance over which it must act, and the space the cylinder has to live in.

• Bore and rod diameter — set the force at a given pressure and the buckling resistance of the rod at full extension.
• Stroke and retracted length — fixed by the machine envelope; a longer stroke inside the same closed length changes rod and gland design.
• Single-acting or double-acting — single-acting with spring or gravity return suits presses and jacks; double-acting gives powered retraction for lifts and benders.
• Mounting — welded end caps, threaded collars, clevis, pin or flange mounting, chosen to match the frame and the direction of load.
• Ports and threads — port size and thread standard must match the pump, hose and coupler already in the circuit.
• Cushioning and relief — end-of-stroke cushioning and an integrated relief path protect both cylinder and frame.

Materials, Seals and Critical Specifications

Cylinder life is decided by the bore surface, the rod surface and the seal package. These are the points we confirm on a drawing before production starts.

• Barrel — honed seamless steel tube, sized for the working pressure with a defined safety margin.
• Piston rod — hard chrome plated, with surface finish and straightness controlled to protect the seal.
• Seals — polyurethane, nitrile or PTFE-based packages selected for the fluid, the temperature range and the duty cycle.
• Gland and guide — guide length and bearing material control side load and rod wear.
• Fluid and temperature — mineral hydraulic oil is standard; seal and coating choice follows the operating temperature range.
• Surface protection — paint or plating on external parts for workshop, outdoor or damp service.

Capacity, Working Pressure and Duty Cycle

Force is pressure multiplied by piston area, so the same ram gives different output at different pump settings. We quote a ram at the pressure the customer's circuit actually delivers, not at a headline figure.

• Rated working pressure and test pressure stated separately.
• Force at rated pressure, and force at the pump's relief setting.
• Duty cycle: intermittent hand-pump use, air-over-hydraulic workshop use, or continuous powered operation.
• Holding requirement — whether the load must stay raised with the pump isolated.
• Oil volume per stroke, which sets reservoir size and pump choice.

Pump, Controls and Line Integration

A ram is only half of a hydraulic circuit. We configure the pump and control side around the machine interface the customer already has, so the cylinder arrives as part of a working system rather than a loose component.

• Manual, air-over-hydraulic or electric pump drive.
• Foot pedal, hand lever or remote pendant operation.
• Check valve for load holding, flow control for controlled lowering, relief valve for system protection.
• Quick couplers and hose routing for porta power and remote-cylinder work.
• Solenoid or PLC-triggered valve blocks where the ram is one axis of an automated station.

Quality Control and Acceptance Testing

Our factory works under an ISO 9001 quality management system, with CE certification on core hydraulic products, and inspection runs through production rather than only at the end of the line.

• Incoming check on tube, rod and seal materials.
• Dimensional check on bore, stroke, retracted length and port position.
• Pressure and leak test on the assembled cylinder.
• Function test on the host tool where the ram is supplied inside a press, crane or jack.
• Full inspection through production to keep defective units out of the shipment.

OEM & ODM Customization, Documentation and Delivery

We supply distributors, brand owners and equipment builders, so most orders carry some level of customization. Cylinder parameters and the surrounding tool can both be adjusted to the market the product is sold into.

• Laser marking of the customer's logo on the product.
• Customized colour box, carton and multi-language user manual.
• Parameter and structure adjustment for regional standards and working habits.
• Prototype design, sample production, mass production and testing for exclusive models.
• Flexible minimum order quantity for market trials, moving to bulk orders as volume grows.
• Packing and shipping arranged from Jiaxing, close to Shanghai and Ningbo ports.

Information We Use to Configure Your Solution

A usable quotation needs the working point, not just a tonnage. The inputs below let us select or design the right cylinder and confirm it against the host machine before anything is cut.

Maintenance, Spare Parts and Serviceability

Rams are rebuilt rather than replaced when the rest of the machine is sound, so serviceability is part of the design brief rather than an afterthought.

• Seal kits, glands, rods and complete replacement cylinders held as service parts.
• Long-term spare parts supply at low cost to keep after-sales work predictable.
• Operation and maintenance video guidance for distributor service teams.
• Replacement for confirmed quality problems, handled through the same channel as the original order.

Frequently Asked Questions

What is a hydraulic ram and where does it fit in your range?

A hydraulic ram is the cylinder that converts pump pressure into linear force; attached to a pump, it extends or retracts to move a load. In our range it appears as the shop press cylinder, the shop crane cylinder, the porta power cylinder, and the cylinders inside jacks, lifts and benders.

Can you supply hydraulic rams as a component rather than a complete tool?

Yes. We build rams into our own presses, cranes and jacks, and we also supply them as cylinders for customers who manufacture or repair their own equipment. Send the working point and the mounting drawing and we will match bore, stroke and ports to it.

What information do you need to quote a custom hydraulic ram?

Required force and available pressure, working stroke, closed length and body diameter, mounting type, port and coupler standard, single- or double-acting action, operating environment and expected order volume. A frame or assembly drawing shortens the process considerably.

Which quality and certification evidence applies to your hydraulic rams?

Our factory operates under an ISO 9001 quality management system and core hydraulic products carry CE certification. Inspection covers incoming material, dimensions, pressure and leak testing, and function testing on assembled tools, with full inspection through production.

Do you support OEM branding and small trial orders?

We laser mark customer logos, produce customized colour boxes, cartons and multi-language manuals, and adjust parameters and structure for regional requirements. Minimum order quantities are flexible so a distributor can test a market before committing to bulk volume.

How are your rams packed and shipped?

Products are packed in customized colour boxes and cartons, then palletized or crated for sea and air freight. Shipments leave from Jiaxing in Zhejiang, close to Shanghai and Ningbo ports and the Hangzhou Bay bridge.