honed steel tube for hydraulic&pneumatic cylinders

CDS honed steel tube specially made for cylinders, which has high precision requirement on the material. The honed tube we made the inside diameter tolerance can be as tight as H7-H9, inside surface finish can be Ra 0.3 Micron or better. Straightness between 0.2-0.3mm/meter. ID: 30-1200mm, Wall thickness: 3—100mm. We also provide CDS ready for honing tube. Tolerance H10. Steel grade : 20#( SAE1020). 45K. St52. 20Mn2. 27SiMn. Etc. Products ID Length Straightness ( mm) Tolerance Surface roughness Cold drawn tube 30-250mm <10.5m 0.3-1.0/1000 H9—H11 Ra 0.8—1.6 Honed tube 40-1200mm <12m 0.3-1.0/1000 H7—H9 Ra 0.4—0.8