... 2008 4. Tolerance:+/-0.0001 high quality stainless steel worm gear with good priceSpecifications:1) Suitable for various automotive, ... meter, projector meter, microscope, gear-test meter, surface measuring meter and so on4) Precision/tolerance:0.0001mm5)Surface ... : iron/aluminum, copper, alloy, carbon steel, 18CrMnTi,20CrMnTi,20Cr,20CrV,1045 steel, others optional7) Products range: standard component ...