he range of aspect ratio of the ejector drill is

The range of aspect ratio of the ejector drill is _________Question 16Select one:a.less than 1000b.up to 100c.larger than 1000d.up to 400e.up to 200Clear my choice

The drill diameter is measured at _________Question 11Select one:a.drill pointb.chesil edgec.margind.necke.heel

The range of the helix angle of the twist drill is

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