Advantage: high precision, nice straightness and small allowance for honing. Minimum surface roughness. Inner roughness: 0.8 Main standards: din2391, en10305-1, astm a 519. Main materials: st45, st52, 1020, 1026, e255, e355 Usage: for honing pipe, hydraulic cylinder, pneumatic cylinder Delivery condition: stress relieved (bks) Straightness: 0.3-1/1000mm Tensile strength: >=610mpa Steel strips bundled, cover with plastic fabric, woven bag packed, or wooden boxes packed
