Page 5 - machining_titanium_05_2019
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SYMBOLS AND UNITS*



                 The guide utilizes metric units and their equivalent US customary units as well.
                 As a rule, the latter are put in brackets and follow metric measurements.

                 AE    angle of engagement,
                 a     machining allowance (stock to be removed) per pass, mm (in)
                 ae    width (radial depth) of cut, mm (in)
                 ap    axial depth of cut, mm (in)
                 apmax   maximum axial depth of cut, mm (in)                                                             TOOLS FOR MACHINING TITANIUM
                 c     ratio of width of cut ae to nominal tool diameter d
                 d     nominal tool diameter, mm (in)
                 de    effective diameter, mm (in)
                 f     feed, mm/rev (IPR, ipr, inches per revolution)
                 fz    feed per tooth (chip load), mm/tooth (IPT, ipt, inches per tooth)
                 fzo    basic (initial) feed, (chip load), mm/tooth (IPT, ipt, inches per tooth)
                 fzmin  minimum feed per tooth (chip load), mm/tooth (IPT, ipt, inches per tooth)
                 fzmax   maximum feed per tooth (chip load), mm/tooth (IPT, ipt, inches per tooth)
                 fzav    arithmetic average feed per tooth (chip load), mm/tooth (IPT, ipt, inches per tooth)
                 hm    average chip thickness, mm (in)
                 hmax   maximum chip thickness, mm (in)
                 Ke    engagement factor
                 Kf    tooth strength factor
                 Kh    overhang factor
                 Km    machinability factor
                 Ks    stability factor
                 n     rotational velocity (spindle speed), rpm (rpm)
                 Q     metal removal rate (MRR), cm³/min (in³/min)
                 Vo    basic cutting speed, m/min (SFM, sfm)
                 Vc    cutting speed, m/min (SFM, sfm)
                 Vf    feed speed (feed rate), mm/min (IPM, ipm, inch per minute)
                 VHP    cutting speed in machining with high pressure coolant, m/min (SFM, sfm)
                 αr    ramping angle
                 χ     cutting edge (entering) angle




                 * in metric system (US customary units are given in brackets)
































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