A 1-lips twist drill having a diameter of 7 [mm] and point angle 118 rotates at 617 [RPM] and feeds towards the work part at a rate of 58 [mm/min], to drill a blind hole of 37 depth. Machining allowance is 3 [mm]. Machining time is then given by:

A 2-lips twist drill having a diameter of 4 [mm] and point angle 117 rotates at 691 [RPM] and feeds towards the work part at a rate of 0.38 [mm/rev], to drill a through hole of 34 depth. Machining allowance is 4 [mm]. Ignore length of chesil. MRR in [mm3/min] is then given by

Consider a milling process. The tool diameter is 81.9 [mm]. Tool height is 33 [mm]. The tool has 9 [inserts]. The tool cuts a slot with the depth of 0.9 [mm] in the surface of the work part. The width of the slot is 81.9 [mm]. The feed speed is set to 60 [mm/min]. The spindle speed is 759 [RPM]. The maximum chip thickness (Feed per tooth) is then given by  __________  [mm]Question 1Answer0.0910.0090.0040.1050.029

The range of the helix angle of the twist drill is

Consider milling a 31 [mm] depth slot in aflat surface of a work part using a slab milling cutter. The diameter of the cutter is 76 [mm], its width is 44 [mm] and it has 9 teeth. The cutter rotates at 576 [RPM]. Measurement of the chip thickness shows that feed rate is 0.02 [mm/tooth]. The length of the work part is 284 [mm]. The allowances at the beginning and end of the cut are 3 [mm]. MRR in [mm3/sec] is then given by  _______ Question 1Answer20831906206420451831

The rake angle of the twist drill lip is ______Question 20Select one:positivepositive near marginpositive near drill centernegativeconstant