instrumentation

Question 1

Blacks naming system

Answer 1

1. fxn
2. manner
3. design of working end
4. shape of shank

Question 2

single bevels, without perpindicular cutting edge

Answer 2

spoon, GMT, chisel

made in R/L pairs (R goes from R to L)

used in lateral/planing/scraping action

Question 3

single bevel, perpindciular cutting edge

Answer 3

• bin angle chisel, hoes, Wedelstat chisel (slight angle)

- mesial or distal bevel, not right or left

Question 4

4 number formula

Answer 4

1. width in .1mm
2. degree centigrade of cutting edge to handle, always over 50 (not in 3 number, perpindicular angle) goes CW
3. length of blade in mm
4. degree centigrade of blade to handle in CW

Question 5

secondary cutting edge

Answer 5

2 of them, they extend from primary edge for length of blade

so 3 total cutting edges (chisels, hatchets)

Question 6

4 subdivisions of excavators

Answer 6

1. ordinary hatchets
2. hoes
3. angle formers
4. spoons

Question 7

main groups of cutting instruments

Answer 7

1. excavators (hatchets, hoes, angle formers, spoons)

2. chisels (straight, mon, bin, wedelstat)