CNC Cutting Tools and Tooling 2

Question 1

What does SFM stand for in CNC cutting tool calculations?

Accepted Answer

Surface Feet per Minute

Answer

Surface Finish Measurement

Answer

Standard Feed per Minute

Answer

Spindle Feed Multiplier

Question 2

Using the formula RPM = (SFM × 3.82) / Diameter, what RPM is needed for a 0.5-inch end mill at 600 SFM?

Accepted Answer

4,584 RPM

Answer

2,292 RPM

Answer

1,146 RPM

Answer

3,600 RPM

Question 3

What is the chip load (feed per tooth) for a 4-flute end mill running at 3,000 RPM with a feed rate of 60 IPM?

Accepted Answer

0.005 inches

Answer

0.020 inches

Answer

0.015 inches

Answer

0.010 inches

Question 4

What is the primary function of a drill's point angle?

Accepted Answer

To affect how the drill starts and centers itself

Answer

To determine spindle speed requirements

Answer

To control the size of the entry chamfer

Answer

To set the correct retract height

Question 5

Which tool type is specifically designed to enlarge and improve the surface finish of an existing hole?

Accepted Answer

Reamer

Answer

Center drill

Answer

Boring bar

Answer

Counterbore

Question 6

What does the term 'runout' refer to when measuring a cutting tool in a holder?

Accepted Answer

The deviation of the tool tip from true rotation center

Answer

The distance the tool extends from the holder

Answer

The maximum depth of cut the tool can handle

Answer

The feed rate range for the tool