Use the attached recommended Speed/Feed chart to answer the following questions.Please Show all

work and submit your answers:

**1. What is the formula for calculating spindle speed in
milling/drilling operations?**

**2. What rpm should you set the spindle on an end milling**

operation in Aluminum 2024 T6? The tool path is a pocketing

operation using a 3/4” end mill with .125” depth cuts. The aluminum

is 5”x 6” x 2” and is being held in a 6” mill vise.

operation in Aluminum 2024 T6? The tool path is a pocketing

operation using a 3/4” end mill with .125” depth cuts. The aluminum

is 5”x 6” x 2” and is being held in a 6” mill vise.

**3. What would be an appropriate spindle speed for a 4**

inch face mill (8 carbide cutting inserts) when machining stainless

steels?

inch face mill (8 carbide cutting inserts) when machining stainless

steels?

**4. What is the recommended surface feet per minute for a**

drilling operation in a brass alloy using a High Speed drill

bit?

drilling operation in a brass alloy using a High Speed drill

bit?

**5. What rpm should you set a drill press to if you are**

drilling a 7/16″ hole in a piece of mild steel. The steel is 1/4″

thick and the hole will go all the way through. (Assume a 118 deg

High Speed Steel Drill bit).

drilling a 7/16″ hole in a piece of mild steel. The steel is 1/4″

thick and the hole will go all the way through. (Assume a 118 deg

High Speed Steel Drill bit).

Let the spindle speed be S TDS 1000 Vx1000 rD Here, Vis cutting speed and Dis diameter, This both parameters vary from types of pipe and material selected. Wx1000 TTD Hence, the required formula is S Expression for the number of revolutions, 12xV rD Substitute the values, 12x 250 ㄫ ㄨ ㄧㄧㄧㄧ 4×12 144000 = 15278.87 15279 rpm the spindle should be 15279 The expression for spindle speed is, Vx1000 兀D Substitute the values, 60 × 1000 S= 12 28647.889×2 60 954.92 ft/sec Hence, the required spindle speed is954.92ft/sec Expression for the number of revolutions, We were unable to transcribe this image