►Changsha langfeng introduce the taper shank twist drill for you : (1). Determining the feed rate of taper shank twist drill: Feed rate is generally depend on people&rsquo s experience, the value is general 0.08-0.12mm / rotation or [Read More]

►changsha langfeng metallic material co.ltd is a loyal manufacture of high speed twist drill bit. Diamond pen on clamping jaw chuck, start grinding wheel infeed, longitudinal reciprocation feed mill repair cone, measured by the size of the inner [Read More]