ST52 skived roller burnished tube compliant with DIN 2391 standards, offers exceptional tensile strength (510–680 MPa) and weldability, making it ideal for heavy-duty hydraulic cylinder systems. However, its true potential is unlocked only through advanced skiving and roller burnishing—a process Datong Hydraulic has speciallized in over 25 years.
Our ST52 skived and roller burnished tubes undergo a rigorously controlled production sequence:
1. Precision Skiving (Internal Turning)：CNC Skiving Machines: Remove material of ST52 to achieve tight dimensional tolerances (ID ±0.05 mm, OD ±0.1 mm). Chip-Free Cutting: Proprietary tool geometry eliminates micro-burrs, preparing a flawless surface for burnishing.
2. Roller Burnishing: The Game-Changer Hydrostatic Roller Technology: Hydraulically powered rollers apply uniform pressure (150–300 MPa) to cold-work the tube’s inner surface. Surface Enhancement:
Achieves mirror-like finish (Ra ≤ 0.1 µm), reducing friction by up to 40%.
Increases surface hardness by 15–20% through strain hardening.
3. Stress Relieving & Straightening：Post-burnishing heat treatment ensures dimensional stability under cyclic loads. Laser-guided straightening corrects deviations to ≤ 0.15 mm/m.
4. End-to-End Quality Assurance：100% ultrasonic testing (UT) for wall thickness uniformity. Surface roughness verified with profilometers (ISO 12181 compliance). Hydrostatic pressure testing at 1.5× working pressure.
DATONG HYDRAULIC produce honed steel tubes and skived roller burnished tubes used for hydraulic cylinder or pneumatic cylinder with high quality & good prices.Imperial sizes & metric sizes available.
