Introduction
Honed tubes are important components of hydraulic cylinders. Simply put, they are tubes that have undergone honing processes. These tubes primarily refer to seamless steel pipes. Therefore, honing is a processing technique that achieves the desired dimensional tolerances and surface roughness of the tube's inner bore within acceptable tolerance ranges.
I. Size Range Of Honed Tube
Honing is performed using a honing machine with honing stones to polish and refine the surface, achieving the desired processing effect. Therefore, the inner diameter of honed tubes typically ranges from 5 to 500 millimeters.
II. Honed Tubes VS Precision Rolled Tubes, Cold-Drawn Tubes
Precision rolled tubes are processed using a "steel pipe cold rolling mill," cold-drawn tubes are processed using a "steel pipe cold drawing machine," while honed tubes are made by further honing (on a honing mill) the material from either cold-drawn or precision rolled tubes. In terms of precision and surface finish, honed tubes have the best surface finish and precision, followed by precision-rolled tubes, and lastly, cold-drawn tubes. (If hot-rolled tubes are included, then hot-rolled tubes have the worst surface finish and dimensions.)
III. Honed Tubes VS Hydraulic Cylinder Tubes
Simply put, honed tubes and hydraulic cylinder tubes describe the same type of product from different perspectives: one emphasizes the manufacturing process, while the other emphasizes the end use.
Honed tubes are manufactured using honing, while hydraulic cylinder tubes, being tubes used in hydraulic cylinders, are not necessarily manufactured using honing; they can also be manufactured using other processes, such as rolling. Hydraulic cylinder tubes can be cold-drawn, hot-rolled, etc. To meet usage requirements, the inner bore of hydraulic cylinder tubes often needs to undergo precision machining such as honing or rolling.
IV. Surface Roughness Ff Honed tubes
A honed tube is a seamless steel tube that has undergone honing. Honing is a machining process that uses a honing head to reciprocate at high speed on the inner hole of a cold-drawn tube, bringing the inner hole to the required dimensional tolerances and surface roughness. Honing can be performed according to customer requirements, achieving tolerances (e.g., H7, H8, H9), surface roughness of Ra0.4, ellipticity within the range of 3-5 microns, and lengths up to 8 meters.
Conclusion: Why Choose Our Honed Tubes
TORICH honed tubes are meticulously designed for superior performance, combining precise dimensional accuracy, excellent surface finish, and reliable long-term durability. By rigorously controlling bore tolerances, surface roughness, and roundness, each honed tube ensures smooth piston movement, minimal friction, and extended service life in hydraulic systems.
Our honed tubes are manufactured from high-quality seamless steel and processed using advanced honing equipment, achieving:
- Tight tolerances required for high-precision hydraulic applications, such as H7–H9
- Ultra-smooth surface roughness, with Ra values as low as 0.4 μm, effectively reducing wear and improving sealing performance
- Excellent straightness (≤0.3 mm/m) and roundness, ensuring stable cylinder performance
- Lengths up to 8 meters, suitable for large hydraulic cylinders and industrial equipment
With rigorous inspection processes, consistent quality, and customized processing solutions, our honed tubes provide reliable solutions for numerous applications, including hydraulic cylinders, construction machinery, industrial automation, and agricultural equipment.
