study for final

Question 1

3. On a reciprocating saw, what is the direction of the cut?

Answer 1

it cuts when it is on its backstroke.

Question 2

4. What is set, and why is it necessary?

Answer 2

it is the width of the tooth offset from side to side. It makes the blade cut a wider path to make room for the back of the blade.

Question 3

5. What are common tooth forms?

Answer 3

common tooth forms are standard, skip, and hook.

Question 4

6. What can happen if the stock stop is left in place during the cut?

Answer 4

the stock can catch on the blade at the end of the cut and get jammed at an angle between the blade and the stop. Which can wreck the work piece and the blade.

Question 5

7. What type of cutoff saw will most likely be found in the machine shop?

Answer 5

horizontal band saws.

Question 6

8. Of what value are cutting fluids?

Answer 6

they are of great value. They help provide a smooth cut, keep the piece cool during the cutting process, and help remove the chips.

Question 7

9. What can result if chips are not properly removed from the cut?

Answer 7

the blade can chip or brake, kind of like how a tap brakes and the finish on the material can get scored.

Question 8

10. If a blade has been replaced after a cut has been started, what must be done with the workpiece?

Answer 8

A new cut must be started from the opposite side.

Question 9

1. Are you likely to find an abrasive saw used routinely for cutting stock in a machine shop?

Answer 9

No. they work harden the stock too easily, have a large kerf and do not always cut straight.

Question 10

2. What are the advantages of the abrasive saw?

Answer 10

They are quick and easy to use. And they can cut a lot of different materials.

Question 11

3. What type of abrasives are used on what types of materials?

Answer 11

Aluminum oxide is used to cut most metals like steel. Silicon carbide is used on nonmetallic materials like stone. Diamond abrasives are used on really hard things like glass.

Question 12

4. Name two types of abrasive wheel bonds.

Answer 12

Shellac bond and Resinoid bond.

Question 13

5. What is one advantage of a precision cold saw?

Answer 13

One advantage is that it can hold a tight length and parallel tolerance of 0.002 when cutting.

Question 14

6. What is the bond of an abrasive wheel?

Answer 14

the bond is the glue or resin that holds the abrasive particles together. As the blade is used the bond wares down it exposes new abrasive material.

Question 15

7. What can be the result of over speeding an abrasive wheel?

Answer 15

over speeding an abrasive wheel can cause the wheel to break apart and explode while running.

Question 16

8. What factors should be considered in selecting an abrasive wheel?

Answer 16

the material being cut, the size of the material, if a dry or wet cut is going to be made, and the burr that can be left by the cut.

Question 17

9. What can result from abrasive sawing of nonferrous metals?

Answer 17

the material can get jammed into the blade, requiring more pressure on the cut. This would cause more heat as well. If gone too far the blade could explode.

Question 18

10. Could cold sawing be classified as precision sawing?

Answer 18

Yes.