Tube surface roughness of the finished tube is one of the most critical specifications for the quality and the lifecycle of your finished device. Surface defaults cannot be removed by electro polishing of the finished stent. Cracks and deformations will remain. With our unique tube production technology we are able to avoid cracks and obtain a better inner surface. We are leading in high quality OD and ID surfaces. On the OD we are able to produce roughness up to 0,1 µm (Ra). For the ID we are able to achieve roughness as low as 0,2 µm (Ra) as drawn, with a thin oxide layer.
This specific tube related specification has a great influence on the laser cutting process. Vascotube® is able to reach concentricity tolerances up to 0,01 mm in regular production batches.
The tolerances on wall thickness for our tubes can be asked as narrow as +/- 0,0075 mm. Vascotube® can guarantee these tolerances, not only for a single tube, but for entire production batches. This attribute has significant influence on the lifecycle of your device and the performance in fatigue testing.
|Diameter / Tolerances||Wallthickness / Tolerances|
|> 0,800 mm / ±0,005||0,050 – 0,120 mm / ±0,0075|
|0,801 – 2,800 mm / ±0,010||0,130 – 0,260 mm / ±0,010|
|2,810 – 6,000 mm / ±0,015||0,270 – 0,400 mm / ±0,013|
|6,010 – 12,000 mm / ±0,020||0,410 – 0,600 mm / ±0,020|
|12,010 – 15,000 mm / ±0,030||0,610 – 1,000 mm / ±0,030|
Notes: Tolerances may vary depending on the wall thickness / outer diameter ratio.