EAST AI Hydraulic Manufacturer
Since 2006
Product Category
A Bored Tube is a type of seamless steel tube that has been internally machined (bored) to achieve a precise internal diameter and smooth surface finish. It is mainly used as the cylinder barrel for heavy-duty hydraulic cylinders, especially in large equipment such as excavators, loaders, bulldozers, mining trucks, and marine machinery.
High strength and toughness, suitable for heavy-duty hydraulic systems.
Excellent roundness and straightness after boring, ensuring smooth piston movement.
Outstanding weldability and machinability, allowing for custom processing.
Cost-effective solution compared to honed tubes when ultra-high precision is not required.
Long service life and reliable performance under harsh working conditions.
Typical materials include ST52, 27SiMn, and Q355D. These grades provide superior mechanical strength, impact resistance, and good machinability, making them ideal for large-diameter hydraulic cylinders and mining equipment.
Inner diameter range: 80 mm – 800 mm (customizable).
Wall thickness: up to 100 mm depending on design requirements.
Length: up to 15 meters per piece.
Surface roughness: Ra ≤ 3.2 μm (before honing).
Straightness tolerance: ≤ 0.3 mm/1000 mm.
EAST AI can provide further machining such as honing, skiving, and roller burnishing according to your hydraulic cylinder needs.
A Bored Tube is rough-machined with an internal boring process, while a Honed Tube is further processed through honing or skiving & roller burnishing to achieve a mirror-like surface finish. Bored Tubes are ideal for large hydraulic cylinders where structural strength is more important than ultra-fine internal finish.
Bored Tubes are widely used in construction, mining, metallurgical, marine, and heavy machinery applications. They are suitable for equipment such as mining dump trucks, offshore drilling platforms, hydraulic presses, and large loaders.
Yes. EAST AI provides customized boring services based on specific requirements, including different materials, wall thicknesses, diameters, and mechanical properties. We also support heat treatment (Q+T), internal honing, and chrome plating upon request.
EAST AI performs strict raw material selection, ultrasonic testing, precision boring, and full-dimensional inspection. Each tube is checked for straightness, roundness, and internal finish to ensure it meets international hydraulic standards. Our factory is GL-certified (Approval of Material Manufacturers), ensuring consistent quality and reliability.
EAST AI Hydraulic Manufacturer
Since 2006
