Calculation of Milling Time

Q. Data for plain milling operation are given below:
Length of work piece = 200 mm,
Cutter diameter = 10 mm, Number of teeth = 4
Cutter speed = 100 rpm,
Feed = 200 mm/min, Depth of cut = 2 mm,
Total clearance (entry and exit) = 5 min

Machining time for one single pass (in seconds) is

1. 60
2. 66
3. 126
4. 150

Q. A side and face cutter 125 mm diameter has 10 teeth. If operates at a cutting speed of 14 m/min with a table traverse 100 mm/min the feed per tooth of the cutter is

1. 10 mm
2. 2.86 mm
3. 0.286 mm
4. 0.8 mm

Q. Determine the cutting time in cutting a 130 mm long keyway using HSS end mill of 20 mm diameter, having 5 cutting teeth. The depth of keyway is to be 4.5 mm. Feed per tooth is 0.15 mm and cutting speed is 95 m/min.

1. 3.6 sec
2. 7.4 sec
3. 8.3 sec
4. 10.5 sec

Q. A milling cutter having $8$ teeth is rotating at $150rpm$. If the feed per tooth is $0.1mm$, the speed in $mm$ per minute is

1. $120$
2. $187$
3. $125$
4. $70$

Q. Feed rate in slab milling operation is equal to

1. rotation per minute (rpm)
2. product of rpm and number of teeth in the cutter
3. product of rpm, feed per tooth and number of teeth in the cutter
4. product of rpm, feed per tooth and number of teeth in contact.

Q. A steel flat surface of 150 mm is to produced by a horizontal axis milling machine where spindle speed is 65 rpm. The milling cutter has 8 teeth, 100 mm diameter and the machining time assuming that the entire stock can be removed in one pass and depth of cut 2 mm and feed rate of 0.15 mm/tooth is________sec

1. 136.92

Q. A milling cutter having $8$ teeth is rotating at $100rpm$. The workpiece feed is set at $40mm/min$ the feed per tooth is

1. $5mm$
2. $0.05mm$
3. $0.4mm$
4. $0.2mm$

Q. A milling cutter having $10$ teeth is rotating at $100rpm$. The table feed is set at $50mm$ per minute. The feed per tool in $mm$ is

1. $5$
2. $0.5$
3. $0.2$
4. $0.05$