Main Cylinder for Hydraulic Press | Precision Stamping Component

Product Specifications

Technical details and manufacturing context for Main Cylinder

Definition

The main cylinder is the core hydraulic component of a Precision Hydraulic Stamping Press, responsible for converting hydraulic pressure into linear mechanical force to drive the ram or slide during metal forming operations. It provides the primary stamping force required for precision blanking, punching, bending, and deep drawing processes. Constructed from high-strength alloy steel with chromium-plated steel piston rods and bronze bushings, the cylinder is designed for durability and precise motion control. Key parameters include a rated force of 1000–5000 kN, a stroke length of 200–800 mm, and an operating pressure of 25–31.5 MPa. The cylinder bore diameter ranges from 200–500 mm, and the piston rod diameter from 100–280 mm, with a maximum speed of 100–250 mm/s. Positioning accuracy is ±0.05–±0.1 mm, and the operating temperature range is -20 to 80°C. Seal materials may be NBR or PTFE, and cylinder materials include 45# or 27SiMn steel, referencing standards GB/T 699 and GB/T 3077. The weight of the cylinder is typically 500–3000 kg. These values are directory reference ranges and must be confirmed for the specific model and application. The cylinder interfaces with the hydraulic power unit, control valves, and the press frame. Selection inputs include required force, stroke, speed, and accuracy. Verification questions should address actual performance data, material certifications, and compliance with applicable standards. Maintenance signals include seal wear, fluid contamination, and unusual noise. Failure boundaries include exceeding rated pressure or force, which can cause structural damage or seal failure.

Working Principle

High-pressure hydraulic fluid enters the cylinder chamber, acting on the piston surface to create linear force. This force is transmitted through the piston rod to the press ram. Pressure is controlled via hydraulic valves to regulate force output and stroke speed for precise stamping operations. The cylinder's bore diameter and operating pressure determine the maximum force, while the stroke length defines the ram travel. Speed is influenced by fluid flow rate, and positioning accuracy depends on valve response and feedback systems.

Common Materials

High-strength alloy steel, Chromium-plated steel, Bronze bushings

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Force	1000–5000 kN	Determines press capacity; higher force requires larger cylinder.
Stroke Length	200–800 mm	Defines maximum workpiece height.
Operating Pressure	25–31.5 MPa	Typical for hydraulic presses; higher pressure reduces cylinder size.
Cylinder Bore Diameter	200–500 mm	Directly related to force at given pressure.
Piston Rod Diameter	100–280 mm	Affects buckling strength and return speed.
Max Speed	100–250 mm/s	Higher speed reduces cycle time but may require larger pumps.
Positioning Accuracy	±0.05–±0.1 mm	Critical for precision stamping.
Operating Temperature	-20–80 °C	Seals and hydraulic fluid limit range.
Seal Material	NBR–PTFE	NBR for general use, PTFE for high temperature or low friction.
Cylinder Material	45#–27SiMn	27SiMn for high strength and wear resistance.GB/T 699, GB/T 3077
Weight	500–3000 kg	Affects installation and structural support.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Cylinder Barrel Part
Contains hydraulic fluid and guides piston movement

Material: High-strength alloy steel
Piston Part
Converts hydraulic pressure into linear force

Material: Hardened steel with seals
Piston Rod Part
Transmits force from piston to press ram

Material: Chromium-plated steel
End Caps Part
Seal cylinder ends and provide mounting points

Material: Steel
Seals and Gaskets Part
Prevent hydraulic fluid leakage

Material: Polyurethane or nitrile rubber

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Extrusion Press

View system integration details

Manufacturers of Main Cylinder

Manufacturer profiles associated with Main Cylinder.

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Frequently Asked Questions

What is the main cylinder's role in a hydraulic press?

It converts hydraulic pressure into linear mechanical force to drive the ram, providing the primary stamping force for operations like blanking, punching, bending, and deep drawing.

What materials are used in the main cylinder?

High-strength alloy steel for the cylinder body, chromium-plated steel for the piston rod, and bronze bushings. Cylinder material may be 45# or 27SiMn steel, with seal materials NBR or PTFE.

What are the typical performance parameters?

Rated force 1000-5000 kN, stroke 200-800 mm, operating pressure 25-31.5 MPa, bore diameter 200-500 mm, piston rod diameter 100-280 mm, max speed 100-250 mm/s, positioning accuracy ±0.05-±0.1 mm, operating temperature -20 to 80°C, weight 500-3000 kg.

How should I verify the cylinder's suitability for my application?

Confirm model-specific values for force, stroke, speed, and accuracy with the manufacturer. Check material certifications and compliance with standards like GB/T 699 and GB/T 3077.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 350 bar (5000 psi)
flow rate:	Up to 300 L/min
temperature:	-20°C to 120°C
slurry concentration:	Not applicable (hydraulic oil only)

Main Cylinder

Product Specifications

Applied To / Applications

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Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards