specification

Item

Parameters

Curvature Radius

R≥2.0mm

Surface precision N

Normal

N≥3,ΔN≥0.5

Higher

N≤1,0.5≥ΔN≥0.1

Eccentricity C

C≥0.002

Surface defects B

Normal

≥80-50

Higher

≤30-20

Diameter D/ Tolerance T

D≥1.8,T≥0.01

Centric thickness/Diameter

1/20

Coating

Monolayer/ Multilayer