Обший каталог Yamawa 2016 - 2017 - страница 670

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Center Drills/Centering Tools Spiral Fluted Taps (for blind hole) MHCDS Center Drills for Carbon Steels of Middle Hardness for running at High Speed Spiral Fluted Taps (for through hole) Specification Coating For icon explanation, refer to P.50 Spiral Pointed Taps (for through hole) Product features ●In order to improve positioning accuracy of projection and shank tolerance, MHCDS has the cutting edge only on one end. ●Considering clearance between center point and bottom of center hole, cutting edge length(ℓ) is made as short as possible to Hand Taps increase toughness. ●To increase centrality, drill point has 3 rakes and X thinning design, which enables high speed cutting and feeding. ●Increased centrality leads to great improvement of surface finish and circularity of center-drilled hole. Cemented Carbide Taps Cutting data Great extension of tool life with MHCDS Cutting condition [ 3×60°×8 ] Right pictures show difference of Work material S55C the damage on cutting edge Machine NC lathe Roll Taps between CD-S and MHCDS after Cutting speed 30m/min（1,200min-1） 480 hole cuttings under same Feed 0.15mm/rev Cutting fluid Water soluble oil cutting condition (stated in right). MHCDS has smaller wear and Special Thread Taps Simple Inspection Tools edge damage. This tells we can CD-S ＭＨＣＤＳ continue to use MHCDS further. Great improvement in surface roughness and circularity with MHCDS Pipe Taps Under the cutting condition stated above, the surface finish of center-drilled hole has greatly been improved. Circularity of center drilled hole as well as run-out tolerance of turning axis has been improved. 90 135 45 Thread Mills μm Surface roughness of center drilled 60°face 180 0 225 315 Dies 100μm 270 0.5 1.0 1.5 2.0 mm ×100 Enlarged picture Circularity of center drilled 60°face Center Drills Recommended cutting condition ●Material : Carbon Steels(S55C) Alloy Steels(SCM440) Designation Dc×θ×Ds Feed f RPM n ( mm/rev ) ( min-1) 1×60 ゜×4 0.1 3,800 Centering Tools 1.5×60 ゜×5 2,400 2×60 ゜×6 1,900 2.5×60 ゜×8 0.15 1,500 3×60 ゜×8 1,200 4×60 ゜×10 1,000 5×60 ゜×12 0.2 800 6×60 ゜×16 600 JIS CE-27 666 For improvement, spec may change without advance notice.