Custom Order Delivery - Hydraulic Cylinder Custom Order Instructions (Specifications 194-160)

 

I. Specification Parameter Analysis

“194-160” usually refers to the key dimensions of the hydraulic cylinder:

Outer diameter (φ194mm): The outer diameter of the cylinder, which determines the installation space and compatibility with accessories such as the cylinder head and flange.

Inner diameter (φ160mm): The inner diameter of the cylinder, which directly affects the piston stroke, hydraulic oil volume and hydraulic cylinder thrust (thrust = pressure × inner diameter cross-sectional area).

 

II. Key points of customized requirements

Material selection

Common materials:

45# steel (quenched and tempered, moderate strength, high cost performance);

27SiMn (high strength, wear resistance, suitable for high pressure conditions);

Stainless steel (such as 304/316, corrosion-resistant, used in special environments).

Required to confirm: working pressure, medium (hydraulic oil/water-based fluid), environmental corrosiveness.

Processing accuracy requirements

Inner diameter roughness: usually needs to reach Ra0.4-0.8μm to ensure the life of the piston seal;

Roundness/cylindricity: ≤0.03mm to avoid piston jamming;

Straightness: ≤0.1mm/m to prevent cylinder deformation.

Surface treatment

Quenched hard chrome plating (thickness 0.05-0.1mm): improve wear resistance and corrosion resistance;

Blackening/galvanizing: basic anti-rust treatment (suitable for non-high-pressure scenarios).

Interface and installation method

Threads, flanges or welding grooves need to be processed at both ends of the cylinder to adapt to the cylinder head and piston rod;

The installation method (such as earring type, base type) affects the structural design of the cylinder end.

 

3. Application scenario adaptation

Engineering machinery: hydraulic arms of excavators and loaders need to be impact-resistant and high-pressure-resistant (recommended material 27SiMn, pressure ≥25MPa);

Industrial equipment: injection molding machines, presses, high dimensional accuracy (inner diameter tolerance H8-H9);

Agricultural machinery: tractor suspension system, 45# steel + surface quenching can be selected, taking into account both cost and durability.

 

4. Production cycle and quality inspection standards

Cycle: Conventional material processing is about 7-10 days, special materials or precision grinding need to be extended to 15 days;

Quality inspection:

Dimensional inspection: three-coordinate measuring instrument verifies inner diameter and wall thickness;

Pressure test: static pressure test of 1.5 times the rated pressure (such as working pressure 16MPa, test pressure 24MPa), maintain pressure for 30 minutes without leakage;

Surface flaw detection: magnetic particle testing (MT) or ultrasonic testing (UT) to eliminate defects such as cracks.