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Blueprint Reading for the Machine Trades, Sixth

Edition Unit 4 Reading Multiview Drawings

- Russ Schultz and Larry Smith
- PowerPoint presentation created by LaVonne

Vichlach

Reading the Drawings

- Sufficient number of dimensions on a print to

enable you to produce the drawing - Each dimension appears only once
- Drafter may place dimension on different view

than expected

Reading the Drawings

- Need to be proficient at reading multiview

drawings - May need to calculate dimensions not provided

from surrounding information

Spacer Block

- Calculate

A

.62

Spacer Block

Calculate

B

.66

Spacer Block

Calculate

C

.64

Spacer Block

Calculate

D

1.94

Spacer Block

Calculate

E

1.04

Spacer Block

Calculate

F

1.28

Spacer Block

Calculate

G

1.30

Spacer Block

Calculate

H

1.92

Spacer Block

Calculate

I

1.14

Spacer Block

Calculate

J

.10

Spacer Block

Calculate

K

1.94

Spacer Block

Calculate

L

.82

Spacer Block

- Calculate

M

1.04

Basic Dimension Quiz

Which of the three basic dimensions are shown in

the front view-height, width, or depth?

Height Width

Basic Dimension Quiz

Which of the three basic dimensions are shown in

the top view-height, width, or depth?

Width Depth

Basic Dimension Quiz

Which of the three basic dimensions are shown in

the right-side view-height, width, or depth?

Height Depth

Basic Dimension Quiz

Which of the three basic dimensions are shown in

the bottom view-height, width, or depth?

Width Depth

Basic Dimension Quiz

Which of the three basic dimensions are shown in

the left-side view-height, width, or depth?

Height Depth

Basic Dimension Quiz

Which of the three basic dimensions are shown in

the rear view-height, width, or depth?

Height Width

Dimension Calculations 1

1. Height dimension?

1.30

Dimension Calculations 1

2. Width dimension?

2.00

Dimension Calculations 1

3. Depth dimension?

1.10

Dimension Calculations 1

- Calculate

A

.50

Dimension Calculations 1

- Calculate

B

.80

Dimension Calculations 1

- Calculate

C

.70

Dimension Calculations 1

- Calculate

D

.50

Dimension Calculations 1

- Calculate

E

.60

Dimension Calculations 1

- Calculate

F

.20

Dimension Calculations 1

- Calculate

G

1.30

Dimension Calculations 1

- Calculate

H

2.00

Dimension Calculations 1

- Calculate

I

1.50

Dimension Calculations 1

- Calculate

J

.50

Dimension Calculations 1

- Calculate

K

.60

Dimension Calculations 1

- Calculate

L

1.10

Dimension Calculations 1

- Calculate

M

.60

Dimension Calculations 1

- Calculate

N

.50

Precedence of Lines

- When visible lines, hidden lines, or centerlines

coincide in same view-a preferred line is

illustrated.

Precedence of Lines

- Visible line over hidden line
- Visible line over centerline
- Hidden line over centerline

Precedence of Lines

ADJ Holding Block

- 1. What is the name of the object?

Adj Holding Block

ADJ Holding Block

- 2. Of what material is the object made? (Do not

abbreviate.)

Hot-rolled steel

ADJ Holding Block

- 3. To what scale (half, full, double) is the

object drawn?

Full

ADJ Holding Block

- 4. What system of dimensioning (fractional,

decimal, metric) is used?

Metric

ADJ Holding Block

- 5. What decimal increments (inches, centimeters,

millimeters) are used?

Millimeter

ADJ Holding Block

- 6. What angle of projection (first, second,

third) is used?

Third

ADJ Holding Block

- 7. What tolerance is assigned to each dimension?

?0.5 MM

ADJ Holding Block

- 8. What is the height dimension?

38 MM

ADJ Holding Block

- 9. What is the width dimension?

68 MM

ADJ Holding Block

- 10. What is the depth dimension at maximum

material condition?

39.5

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter A.

39

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter B.

55.5

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter C.

22

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter D.

41

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter E.

24

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter F.

25.5

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter G.

24.5

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter H.

14.5

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter I.

6.5

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter J.

12

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter K.

10

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter L.

7.5

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter M.

18.5

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter N.

4.5

ADJ Holding Block

- Enter the dimensions from the drawing 11A011 for

the letter O.

14.5

Dimension Calculations 2

- Height dimension?

1.32

Dimension Calculations 2

- Depth dimension?

1.58

Dimension Calculations 2

- Calculate

A

.48

Dimension Calculations 2

- Calculate

B

1.38

Dimension Calculations 2

- Calculate

C

.32

Dimension Calculations 2

- Calculate

D

.34

Dimension Calculations 2

- Calculate

E

.66

Dimension Calculations 2

- Calculate

F

.30

Dimension Calculations 2

- Calculate

G

.58

Dimension Calculations 2

- Calculate

H

1.86

Dimension Calculations 2

- Calculate

I

.32

Dimension Calculations 2

- Calculate

J

.36

Dimension Calculations 2

- Calculate

K

.04

Dimension Calculations 2

- Calculate

L

.66

Dimension Calculations 2

- Calculate

M

.32

Dimension Calculations 2

- Calculate

N

.96

Accumulated Tolerances

- Drawings are dimensioned to control tolerance of

important features - Double dimensioning is avoided
- Machinist needs to calculate dimensions
- Calculated dimension will accumulate tolerance of

every dimension used---true of addition and

subtraction

Dimensioning Methods

- Three different methods of dimensioning same

shaft - Tolerances on step may vary depending on

dimensioning method

Chain Dimensioning

- Includes length of each step
- Individual tolerance for each step is controlled
- Does not include overall length
- Each step has a tolerance
- Overall length accumulates tolerance of each step

Broken-Chain Dimensioning

- Includes overall length and all but one step

length - Tolerance on overall length
- All but least important step is controlled
- Undimensioned length accumulates tolerance of all

dimensions used to calculate it.

Datum Dimensioning

- Each step length is measured from a common

surface or baseline - Accumulation is limited to not more than two

tolerances

A

- 5-Step Shaft

D

C

B

Enter the appropriate letters (A thru D) into the

corresponding numbered balloons shown.

A

C

- 5-Step Shaft

E

D

B

Enter the appropriate letters (A thru D) into the

corresponding numbered balloons shown.

- 5-Step Shaft

What is the tolerance on the overall length?

?.01

- 5-Step Shaft

What is the tolerance on the length of step B?

?.05

- 6-Step Shaft

- Is (a) first-angle or (b) third-angle projection

used?

(b) third-angle

- 6-Step Shaft

- Is the circular view (a) a top or (b) a bottom

view?

(a) Top view

- 6-Step Shaft

- Is the part (a) concentric or (b) eccentric?

(b) concentric

- 6-Step Shaft

- Is the part
- (a) symmetrical or
- (b) nonsymmetrical?

(a) symmetrical

- 6-Step Shaft

- What is the print tolerance for each dimension

shown?

? .01

- 6-Step Shaft

- What is the overall length of the shaft?

3.60

- 6-Step Shaft

7. What is the MMC of shoulder E OD?

1.51

- 6-Step Shaft

8. What is the MMC of the bore ID?

1.49

- 6-Step Shaft

9. What is the tolerance on the length of

shoulder A ?

? .02

- 6-Step Shaft

10. What is the tolerance on the length of

shoulder D ?

? .01

- 6-Step Shaft

11. Why are the answers to questions 9 and 10

different?

- 6-Step Shaft

12. Why is there no hidden line representing

the 1.50 bore diameter in the circular view?

Precedence of lines rule-corresponds to 1.50 ?

step

Enter the appropriate letters G, H, I J, L,

and M into corresponding balloons.

K

I

G

J

H

M

Enter the appropriate letters N and L into

corresponding balloons.

L

N

- Surface Identification 3

B

H

A

G

C

I

E

D

F

Enter the letters from the front view into the

corresponding balloons in the top view.

Near-closets to viewers eye. Far-blocked from

view by near surfaces.

All tolerances are assigned a tolerance of ?

.01. This example is the broken-chain

method-tolerances accumulate.

Surface Identification 3

A and B A and C A and E B and F C and F B and

G C and G E and G F and G

? .01 ? .02 ? .04 ? .04 ? .03 ? .02 ? .03 ? .05 ?

.06

Maximum tolerance accumulation ? .06

All tolerances are assigned a tolerance of ?

.01. This example is the datum method controls

tolerance accumulation.

Tolerance Calculations

A and B A and C A and E B and F C and F B and

G C and G E and G F and G

? .01 ? .01 ? .01 ? .02 ? .02 ? .02 ? .02 ? .02 ?

.02

Maximum tolerance accumulation ? .02

Tolerance Calculations 2

Calculate reference dimensions and their

accumulated tolerances. Tolerances always add.

Phantom lines represent the limits.)

40 ? 2

Tolerance Calculations 2

Calculate reference dimensions and their

accumulated tolerances. Tolerances always add.

Phantom lines represent the limits.)

40 ? 2

Tolerance Calculations 2

Calculate reference dimensions and their

accumulated tolerances. Tolerances always add.

Phantom lines represent the limits.)

40 4/-0

Tolerance Calculations 2

Calculate reference dimensions and their

accumulated tolerances. Tolerances always add.

Phantom lines represent the limits.)

20 ? 2

Tolerance Calculations 2

Calculate reference dimensions and their

accumulated tolerances. Tolerances always add.

Phantom lines represent the limits.)

20 4/-0

Tolerance Calculations 2

Calculate reference dimensions and their

accumulated tolerances. Tolerances always add.

(Phantom lines represent the limits.)

20 ? 2

Hole Identification 1

Determine the hole diameter that corresponds with

each encircled letter shown on the orthographic

views.

A

.375

Hole Identification 1

Determine the hole diameter that corresponds with

each encircled letter shown on the orthographic

views.

B

.370

Hole Identification 1

Determine the hole diameter that corresponds with

each encircled letter shown on the orthographic

views.

C

.375

Hole Identification 1

Determine the hole diameter that corresponds with

each encircled letter shown on the orthographic

views.

D

.370

Hole Identification 1

Determine the hole diameter that corresponds with

each encircled letter shown on the orthographic

views.

E

.380

Hole Identification 1

Determine the hole diameter that corresponds with

each encircled letter shown on the orthographic

views.

F

.380

Hole Identification 1

Determine the hole diameter that corresponds with

each encircled letter shown on the orthographic

views.

G

.380

Hole Identification 1

Determine the hole diameter that corresponds with

each encircled letter shown on the orthographic

views.

H

.370

Hole Identification 1

Determine the hole diameter that corresponds with

each encircled letter shown on the orthographic

views.

I

.370

Hole Identification 1

Determine the hole diameter that corresponds with

each encircled letter shown on the orthographic

views.

J

.370

Hole Identification 1

Determine the hole diameter that corresponds with

each encircled letter shown on the orthographic

views.

K

.375

Hole Identification 1

Determine the hole diameter that corresponds with

each encircled letter shown on the orthographic

views.

L

.380

Dimension Calculations 3

Determine the dimensions that correspond to the

encircled letters shown to the right.

A

.45

Dimension Calculations 3

Determine the dimensions that correspond to the

encircled letters shown to the right.

B

.55

Dimension Calculations 3

Determine the dimensions that correspond to the

encircled letters shown to the right.

C

.55

Dimension Calculations 3

Determine the dimensions that correspond to the

encircled letters shown to the right.

D

.60

Dimension Calculations 3

Determine the dimensions that correspond to the

encircled letters shown to the right.

E

.50

Dimension Calculations 3

Determine the dimensions that correspond to the

encircled letters shown to the right.

F

.45

Dimension Calculations 3

Determine the dimensions that correspond to the

encircled letters shown to the right.

Height

1.05

Dimension Calculations 3

Determine the dimensions that correspond to the

encircled letters shown to the right.

Width

1.00

Dimension Calculations 4

Determine the dimensions that correspond to the

encircled letters shown to the right.

A

.60

Dimension Calculations 4

Determine the dimensions that correspond to the

encircled letters shown to the right.

B

.55

Dimension Calculations 4

Determine the dimensions that correspond to the

encircled letters shown to the right.

C

.55

Dimension Calculations 4

Determine the dimensions that correspond to the

encircled letters shown to the right.

D

.45

Dimension Calculations 4

Determine the dimensions that correspond to the

encircled letters shown to the right.

E

.60

Dimension Calculations 4

Determine the dimensions that correspond to the

encircled letters shown to the right.

F

.50

Dimension Calculations 4

Determine the dimensions that correspond to the

encircled letters shown to the right.

Width

1.00

Dimension Calculations 4

Determine the dimensions that correspond to the

encircled letters shown to the right.

Depth

1.05

View Selection 3

Select correct orthographic view to correspond

with the arrowhead for each pictorial view.

K

View Selection 3

View Selection 3

Select correct orthographic view to correspond

with the arrowhead for each pictorial view.

M

N

View Selection 3

Select correct orthographic view to correspond

with the arrowhead for each pictorial view.

J

View Selection 3

Select correct orthographic view to correspond

with the arrowhead for each pictorial view.

View Selection 3

Select correct orthographic view to correspond

with the arrowhead for each pictorial view.

H

View Selection 3

Select correct orthographic view to correspond

with the arrowhead for each pictorial view.

F

View Selection 3

Select correct orthographic view to correspond

with the arrowhead for each pictorial view.

O

D

View Selection 3

Select correct orthographic view to correspond

with the arrowhead for each pictorial view.

View Selection 3

Select correct orthographic view to correspond

with the arrowhead for each pictorial view.

E

View Selection 3

Select correct orthographic view to correspond

with the arrowhead for each pictorial view.

B

Dimension Calculations 5

Determine the corresponding dimensions for the

following.

Height dimension

1.90

Dimension Calculations 5

Determine the corresponding dimensions for the

following.

Width dimension

2.00

Dimension Calculations 5

Determine the corresponding dimensions for the

following.

A

1.45

Dimension Calculations 5

Determine the corresponding dimensions for the

following.

B

.52

Dimension Calculations 5

Determine the corresponding dimensions for the

following.

C

2.10

Dimension Calculations 5

Determine the corresponding dimensions for the

following.

D

.505

Dimension Calculations 5

Determine the corresponding dimensions for the

following.

E

.42

Dimension Calculations 5

Determine the corresponding dimensions for the

following.

F

1.00

Dimension Calculations 5

Determine the corresponding dimensions for the

following.

G

.45

Dimension Calculations 5

Determine the corresponding dimensions for the

following.

H

.495

Dimension Calculations 5

Determine the corresponding dimensions for the

following.

I

1.13

Dimension Calculations 5

Determine the corresponding dimensions for the

following.

J

.27

Corner BRKT

1. What does BRKT in the title block abbreviate?

Bracket

Corner BRKT

2. What does HRS in the material block

abbreviate?

Hot-rolled steel

Corner BRKT

3. What does NTS in the scale block abbreviate?

Not to scale

Corner BRKT

4. What is the overall depth dimension?

2.22

Corner BRKT

5. What is the MMC of the overall height?

2.19

Corner BRKT

6. What is the MMC of the .360 hole?

.355

Corner BRKT

7. How much tolerance can accumulate between the

.380 hole centers?

? .01

Corner BRKT

8. What is the overall size of the CORNER

BRACKET?

2.22 x 2.24 x 2.18

Corner BRKT

Calculate the value for A

.18

Corner BRKT

Calculate the value for B

.13

Corner BRKT

Calculate the value for C

.37

Corner BRKT

Calculate the value for D

.76

Corner BRKT

Calculate the value for E

.17

Corner BRKT

Calculate the value for F

.31

Corner BRKT

Calculate the value for G

.80

Corner BRKT

Calculate the value for H

.46

Corner BRKT

Calculate the value for I

.31

Corner BRKT

Calculate the value for J

.81

Corner BRKT

Calculate the value for K

.04

Corner BRKT

Calculate the value for L

.49

Corner BRKT

Calculate the value for M

.00

View Selection 4

Select the correct right side view.

View Selection 4

Select the correct right side view.

View Selection 4

Select the correct right side view.

View Selection 4

Select the correct right side view.

View Selection 4

Select the correct right side view.

View Selection 4

Select the correct right side view.

View Selection 4

Select the correct right side view.

View Selection 4

Select the correct right side view.

View Selection 4

Select the correct right side view.

Missing Views 2

Complete the view.

Missing Views 2

Complete the view.

Missing Views 2

Complete the view.

Missing Views 2

Complete the view.

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