Tolerances

Question 1

Categories

Answer 1

1. Form
2. Orientation
3. Location
4. Run-out
5. Profile

Question 2

Form tolerances

Answer 2

• cylindricity
• roundness
• straightness
• flatness

Question 3

Orientation tolerances

Answer 3

• perpendicularity
• parallelism
• angularity

Question 4

Location tolerances

Answer 4

• position
• concentricity
• symmetry

Question 5

Run-out tolerances

Answer 5

• circular run-out

- total run-out

Question 6

profile tolerances

Answer 6

• lines

- surfaces

Question 7

cylindricity: applicability

Answer 7

cylindrical surfaces

Question 8

cylindricity: interpretation

Answer 8

the real cylinder can be inserted into two cylinder; the difference between their radii is the tolerance value

Question 9

roundness: applicability

Answer 9

circular surfaces

Question 10

roundness: interpretation

Answer 10

section by section, intersection with the piece falls into two circumferences; the dufference between their radii is the tolerance value

Question 11

straightness: applicability

Answer 11

• integral features (real features)

- derived features like axes of cylinders

Question 12

straightness: interpretation

Answer 12

the real line or profile is between two lines in the same plane; the distance between them is the tolerance value

Question 13

flatness: applicability

Answer 13

• integral flat surfaces

- derived features (median planes)

Question 14

flatness: interpretation

Answer 14

real surface between two parallel planes; their distance is the tolerance value

Question 15

perpendicularity: applicability

Answer 15

• integral features (flat surfaces)

- derived features (axes, median planes)

Question 16

perpendicularity: interpretation

Answer 16

real surface between two parallel planes, perpendicular to a reference plane (datum feature). distance between the two planes is the tolerance

Question 17

parallelism: applicability

Answer 17

• integral features (flat surfaces)

- derived features (axes, median planes)

Question 18

parallelism: interpretation

Answer 18

real surface between two parallel planes, parallel to a reference plane (datum feature). distance between the two planes is the tolerance

Question 19

angularity: applicability

Answer 19

• integral features (flat surfaces)

- derived features (axes, median planes)

Question 20

angularity: interpretation

Answer 20

real surface between two parallel planes, inclined wrt a reference line (datum feature). distance between the two planes is the tolerance

Question 21

position: applicability

Answer 21

• derived features (axes, median planes, centers)

Question 22

position: interpretation

Answer 22

axes inside a cylinder, whose axis is positioned wrt three reference features (datum system). its diameter is the tolerance

Question 23

concentricity: interpretation

Answer 23

centre inside a circle concentric to the reference circle; diameter is the tolerance