Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems
This presentation is the property of its rightful owner.
Sponsored Links
1 / 260

Blueprint Reading for the Machine Trades, Sixth Edition Unit 2: Dimensioning Systems PowerPoint PPT Presentation


  • 776 Views
  • Uploaded on
  • Presentation posted in: General

Blueprint Reading for the Machine Trades, Sixth Edition Unit 2: Dimensioning Systems. Russ Schultz and Larry Smith PowerPoint presentation created by LaVonne Vichlach. Dimensioning Systems. Four different systems of dimensioning used in U.S. and Canada Fractional inch Decimal inch

Download Presentation

Blueprint Reading for the Machine Trades, Sixth Edition Unit 2: Dimensioning Systems

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Blueprint Reading for the Machine Trades, Sixth Edition Unit 2: Dimensioning Systems

Russ Schultz and Larry Smith

PowerPoint presentation created by LaVonne Vichlach


Dimensioning systems

Dimensioning Systems

  • Four different systems of dimensioning used in U.S. and Canada

    • Fractional inch

    • Decimal inch

    • Dual dimensioning

    • SI Metric


Dimensioning systems1

Dimensioning Systems


Dimensioning systems2

Dimensioning Systems


Dimensioning systems3

Dimensioning Systems


Dimensioning systems4

Dimensioning Systems


Dimensioning systems5

Dimensioning Systems


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

  • Fractional type steel rules divided into units of:

    • 1/16

    • 1/32

    • 1/64

  • Major graduation accentuated by longer lines

  • Some have small numbers printed adjacent to lines


Fractional dimensioning

Fractional Dimensioning

  • Always reduce a fraction to its lowest terms

  • If numerator is even number-it can be reduced

  • Begin your count from a major graduation close to the reading


Fractional dimensioning1

Fractional Dimensioning


Scale reading quiz 1

Scale Reading Quiz 1

Record the scale length identified by

  • 3/4

1


Scale reading quiz 11

Scale Reading Quiz 1

Record the scale length identified by

  • 1 5/8

2


Scale reading quiz 12

Scale Reading Quiz 1

Record the scale length identified by

  • 2 7/16

3


Scale reading quiz 13

Scale Reading Quiz 1

  • 3 3/16

Record the scale length identified by

4


Scale reading quiz 14

Scale Reading Quiz 1

  • 3 15/16

Record the scale length identified by

5


Scale reading quiz 15

Scale Reading Quiz 1

  • 13/16

Record the scale length identified by

6


Scale reading quiz 16

Scale Reading Quiz 1

  • 1 ¾

Record the scale length identified by

7


Scale reading quiz 17

Scale Reading Quiz 1

  • 2 11/16

Record the scale length identified by

8


Scale reading quiz 18

Scale Reading Quiz 1

  • 3 17/32

Record the scale length identified by

9


Scale reading quiz 19

Scale Reading Quiz 1

  • 3 31/32

Record the scale length identified by

10


Decimal scales

Decimal Scales

  • Subdivided into units of 1/10, 1/20, 1/50, or 1/100 in.

  • 1/50 is sufficient for most applications

  • With 50 increments to an inch each increment =.02 in.

  • Reading between increments-capable of determining closest .01 inch measurement


Decimal scales1

Decimal Scales

  • Closer measurements require using micrometer, vernier or dial calipers

  • Major graduations are accented by longer lines-usually every 1/10 in.

  • Popular scales graduation style has .04 and .06 increments slightly longer than .02 and .08

  • Reads faster, more recognizable


Decimal scales2

Decimal Scales


Decimal scales3

Decimal Scales


Decimal scales4

Decimal Scales


Decimal scales5

Decimal Scales


Scale reading quiz 2

Scale Reading Quiz 2

  • .80

Record the scale length identifiedby...

1


Scale reading quiz 21

Scale Reading Quiz 2

  • 1.60

Record the scale length identified by…

2


Scale reading quiz 22

Scale Reading Quiz 2

  • 2.50

Record the scale length identified by…

3


Scale reading quiz 23

Scale Reading Quiz 2

  • 3.32

Record the scale length identified by…

4


Scale reading quiz 24

Scale Reading Quiz 2

  • 3.86

Record the scale length identified by…

5


Decimal dimensioning

Decimal Dimensioning

  • Drawing may be dimensioned using two- or three-place decimals

  • Amount of tolerance is determined by number of decimal places


Decimal dimensioning1

Decimal Dimensioning

  • .50 may have tolerance of ± .01

  • .500 may have tolerance of ± .001

  • .5000 may have tolerance of ±.0001


Decimal dimensioning2

Decimal Dimensioning

  • Converting fractions to decimals-results in too many decimal places

  • Need to round off those numbers to desired places


Decimal dimensioning3

Decimal Dimensioning

  • Rule #1-When the figure following the last digit to be retained is greater than 5---increase the last number by one

    • .016 becomes .02

    • .047 becomes .05

    • .078 becomes .08


Decimal dimensioning4

Decimal Dimensioning

  • Rule #2-When the figure following the last digit to be retained is less than 5---retain the last number

    • .031 becomes .03

    • .062 becomes .06

    • .093 becomes .09


Decimal dimensioning5

Decimal Dimensioning

  • Rule #3-When the figure following the last digit to be retained is exactly 5 and the figure to be retained is odd---increase the last number by one

    • .375 becomes .38

    • .875 becomes .88


Decimal dimensioning6

Decimal Dimensioning

  • Rule #4-When the figure following the last digit to be retained is exactly 5 and the figure to be retained is even---retain the last number

    • .125 becomes .12

    • .625 becomes .62


Decimal dimensioning7

Decimal Dimensioning

  • Rule #3 and #4 are different

    • Established to even numbers as often as possible

    • Even numbers are preferred

    • Decimal numbers divided by two-e.g.-diameter/2 = radius-----results will contain same number of decimal places


Decimal dimensioning8

Decimal Dimensioning


Decimal rounding quiz

Decimal Rounding Quiz

.11

  • .109 =

  • .125 =

  • .156 =

  • .234 =

  • .438 =

  • .547 =

  • .562 =

.12

.16

.23

.44

.55

.56


Decimal rounding quiz1

Decimal Rounding Quiz

.64

  • .641 =

  • .797 =

  • .875 =

  • 1.056 =

  • 1.672 =

  • 2.205 =

  • 2.454 =

.80

.88

1.06

1.67

2.20

2.45


Decimal rounding quiz2

Decimal Rounding Quiz

3.34

  • 3.335 =

  • 3.767 =

  • 5.555 =

  • 6.665 =

  • 7.045 =

  • 8.885 =

3.77

5.56

6.66

7.04

8.88


Metric dimensioning

Metric Dimensioning

  • Metric increment of measure is millimeter

  • Will be noted if different

  • Dual dimensioning system-SI Metric-used in U.S. and Canada

  • Convert a metric dimension to inches by multiplying it by .03937


Metric dimensioning1

Metric Dimensioning

  • Conversion charts are available to provide converted dimensions

  • Metric scales are available and can be used-eliminating need for conversion


Metric dimensioning2

Metric Dimensioning

  • Metric scales

    • Have graduations every millimeter of half-millimeter

    • Designated “mm” or “1/2 mm”

    • Every fifth millimeter is accentuated by a longer line

    • Every tenth millimeter is identified by a number


Metric dimensioning3

Metric Dimensioning


Scale reading quiz 3

Scale Reading Quiz 3

Record the scale length identified by

  • 20 mm

1


Scale reading quiz 31

Scale Reading Quiz 3

Record the scale length identified by

2

  • 35 mm


Scale reading quiz 32

Scale Reading Quiz 3

Record the scale length identified by

3

  • 51 mm


Scale reading quiz 33

Scale Reading Quiz 3

  • 77.5 mm

Record the scale length identified by

4


Scale reading quiz 34

Scale Reading Quiz 3

  • 93.5 mm

Record the scale length identified by

5


Blueprints

Blueprints

  • Blueprinting-Term can be interpreted as

    • Drawing

    • Picture

  • Contains information

    • Required sizes

    • Tolerances

    • Essential requirements

    • Notes and instructions


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

From the information on this drawing, could you make this part?


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Could you make this one?


Engineering drawings

Engineering Drawings

  • Original drawing made by drafter or engineer

  • Prints are referred to as engineering drawings

  • Also referred to as blueprints (more common term)


Engineering drawings1

Engineering Drawings

  • Standardized drawings

    • “A” size is 8 ½ x 11 inches

    • “B” size is 11 x 17 inches

    • “C” size is 17 x 22 inches

    • “D” size is 22 x 34 inches

    • “E” size is 34 x 44 inches


Engineering drawings2

Engineering Drawings


Engineering drawings3

What are the basic dimensions of the A-size drawing?

Engineering Drawings

8 ½ X 11

2. If C-size is twice as large as B-size, how much larger is it than A-size?

4X


Engineering drawings4

Will an E-size print fold to fit in the same envelope with an A-size print?

A2

Engineering Drawings

YES

4. What metric size is twice as large as the A3 size?


Engineering drawings5

Are the A4 metric size and the A inch size exactly the same? (Use 1in = 25.4 mm or 1mm = .03937 in. to compare)

NO

Engineering Drawings


Title blocks

Title Blocks

  • Each drawing contains a Title Block

    • Drawing number is most prominent lettering in title block

    • Lettered larger to stand out

    • Scale determines the size of the object drafted


Title blocks1

Title Blocks

  • Mechanical drawings may be reduced to

    • Half size

    • Quarter size

    • One eighth size


Title blocks2

Title Blocks

  • Mechanical drawings may be enlarged

    • Double

    • Four times

    • Ten times


Title blocks3

Title Blocks

  • Half scale---1/2, 1:2, or ½”=1”

  • Twice scale-2/1, 2:1, 2-1, 2”=1” or 2X

  • Arrangement of numerals indicates relationship


Title blocks4

Title Blocks

  • Refer to scale as the “Do Scale”

    • “D” stands for the drawing

    • “O” stands for the object

    • Sale of 1:2 means

      • The drawing is 1 inch

      • Object is 2 inches

    • A “Do Scale” of 2:1 means

      • The drawing is 2 inches

      • The object is one inch or one half the drawing size


Title blocks5

Title Blocks


Title blocks6

Title Blocks


Title blocks7

Title Blocks


Title blocks8

Title Blocks


Drawing notes

Drawing Notes

  • Local notes-apply to specific item or area

    • Use leaders

    • Direct notes to point of application

  • General notes apply to whole drawing or product

    • Machining

    • Heat treat

    • Material

    • Tolerances


Drawing notes1

Drawing Notes

  • Abbreviations are used in notes

  • Keep them brief


Drawing notes general

UNLESS OTHERWISE SPECIFIED

METRIC UNITS ARE MILLIMETERS

FILS & RNDS ARE .12R

PART SYM ABOUT CL

Drawing Notes-General


Drawing notes local

5 HOLES EQL SP ON 6.000BC

.344 DR, .500 CBORE, .30 DP

.281 DR, 82° CSK, .53 DIA

Drawing Notes-Local


Drawing notes quiz

Drawing Notes Quiz

  • What type of note applies to an entire drawing?

General


Drawing notes quiz1

Drawing Notes Quiz

  • What type of line is used with local notes?

Leader


Drawing notes quiz2

Drawing Notes Quiz

  • Where do general notes appear on a drawing?

Above the title block


Drawing notes quiz3

Drawing Notes Quiz

  • Interpret the abbreviations SYM and CL used in the third general note.

Symmetrical and centerline


Drawing notes quiz4

Drawing Notes Quiz

  • Interpret the abbreviations DR and CSK used in the third local note.

Drill and countersink


Single view drawings

Single-View Drawings

  • Sometimes adequate to describe object

  • Material thickness is listed


Detail drawings

Detail Drawings

  • “Production drawings” and “working drawings” are general terms

  • Includes all types of engineering drawings


Detail drawings1

Detail Drawings

  • Detail drawings include

    • Sufficient number of views

    • Dimensions

    • Notes

    • Other pertinent information


Centerlines

Centerlines


Centerlines1

Centerlines

  • Intersecting centerlines drawn through each hole

  • Used for location-centerlines are extended outside view and dimensions are added

  • Radii are the same-often share a common axis-common design practice


Diameters and radii

Diameters and Radii


Diameters and radii1

Diameters and Radii

  • Internationally recognized symbol for diameter

  • Use in place of the abbreviation DIA

  • Number of holes indicated


Diameters and radii2

Diameters and Radii

  • Overall dimensions can be calculated

  • Remaining material around hole can be calculated


Diameters and radii3

Diameters and Radii

  • Remaining material around hole can be calculated


Answer the questions

Answer the questions


Thermostat gasket

Thermostat Gasket

1. What is the part number?

11A001


Thermostat gasket1

Thermostat Gasket

2. What is the name of the part?

Thermostat gasket


Thermostat gasket2

Thermostat Gasket

3. What is the drawing size? (A, B, or C)

A


Thermostat gasket3

Thermostat Gasket

4. What scale is the drawing?

1:1


Thermostat gasket4

Thermostat Gasket

5. Use words to explain the answer to question 4.

Actual size


Thermostat gasket5

Thermostat Gasket

6. How thick is the part?

.06


Thermostat gasket6

Thermostat Gasket

7. Is the part symmetrical?

Yes


Thermostat gasket7

Thermostat Gasket

8. Which system of dimensioning was used? (Refer to page 21.)

Decimal


Thermostat gasket8

Thermostat Gasket

9. What is the fractional equivalent of the center hole size? (Refer to the equivalency chart, page 25.)

2 3/16


Thermostat gasket9

Thermostat Gasket

  • What is the fractional equivalent of the mounting hole spacing? (Refer to the equivalency chart, page 25.)

3 5/8


Thermostat gasket10

Thermostat Gasket

11. Calculate the longest overall dimension of the part.

4.24


Thermostat gasket11

Thermostat Gasket

12. Calculate the overall dimension of the part (height.)

2.88


Thermostat gasket12

Thermostat Gasket

13. Calculate the material remaining between the large hole and the nearest outside edge.

.345


Thermostat gasket13

Thermostat Gasket

14. Calculate the material remaining between the small hole and the nearest outside edge.

.155


Thermostat gasket14

Thermostat Gasket

15. Calculate the material remaining between the large hole and the nearest small hole.

.56


Break lines

Break Lines

  • Permits removal of a portion of view

  • Paper size is smaller

  • Drawing scale can get smaller

  • Portion removed must be uniform in shape


Break lines1

Break Lines

Drawing is full size and does not require a “B” size drawing


Break lines2

Break Lines


Break lines3

Break Lines


Break lines4

Break Lines


Break lines5

Break Lines


Typical dimensions

Typical Dimensions

  • Entered after a dimension

  • Means all other similar dimensions are same as one marked “TYP”

  • Eliminates repetition of dimensions

  • Saves on drawing space


Symmetry

Symmetry

  • Indicated by note

  • Indicated by view’s centerline carrying abbreviation


Exercise

Exercise

Enter dimensions for the letters provided.


Bottom plate

Bottom Plate

A

1.50


Bottom plate1

Bottom Plate

B

3.60


Bottom plate2

Bottom Plate

C

.30


Bottom plate3

Bottom Plate

D

1.47


Bottom plate4

Bottom Plate

E

6.10


Bottom plate5

Bottom Plate

F

2.00


Bottom plate6

Bottom Plate

G

.19


Bottom plate7

Bottom Plate

H

.57


Bottom plate8

Bottom Plate

I

.86


Bottom plate9

Bottom Plate

J

.68


Bottom plate10

Bottom Plate

K

.10


Bottom plate11

Bottom Plate

L

.46


Bottom plate12

Bottom Plate

1. What type of line was drawn to indicate symmetry?

Centerline


Bottom plate13

Bottom Plate

2. What word is abbreviated TYP?

Typical


Bottom plate14

Bottom Plate

3. What is the thickness of the plate?

.25


Bottom plate15

Bottom Plate

4. How many round holes does the plate contain?

10


Bottom plate16

Bottom Plate

5. What is the fractional equivalent of the small hole diameter?

9/32


Bottom plate17

Bottom Plate

6. How much material remains between a .62 Dia. hole and the nearest outside edge?

.25


Bottom plate18

Bottom Plate

7. How much material remains between a .28 Dia. hole and the nearest outside edge?

.16


Bottom plate19

Bottom Plate

8. Calculate the longest overall dimension of the plate.

6.76


Tolerances

Tolerances

  • Tolerances are assigned to every dimension

  • Assign maximum acceptable deviation-tolerance

  • Shown with dimension

  • Shown in the title block as a general tolerance


Tolerances1

Tolerances

  • General tolerances commonly assigned using decimals

  • Decimal dimension and tolerance have same number of places

  • Most commonly expressed bilaterally-not always equal in both directions


Tolerances2

Tolerances


Tolerance quiz

Tolerance Quiz

1. What is the two place decimal tolerance in Example A?

 .03


Tolerance quiz1

Tolerance Quiz

2. What is the tolerance for drilled holes in Example A?

+ .010

-.002


Tolerance quiz2

Tolerance Quiz

3. What is the three-place decimal tolerance in Example B?

 .004


Tolerance quiz3

Tolerance Quiz

4. What is the fractional tolerance in Example C?

 1/64


Tolerance quiz4

Tolerance Quiz

5. What is the total tolerance for the two-place decimal inch in Example A?

 .03


Tolerance quiz5

Tolerance Quiz

  • What is the angular tolerance in Example C?

 030’


Tolerance quiz6

Tolerance Quiz

  • What is the total tolerance for the three-place decimal inch in Example B?

 .004


Tolerance quiz7

Tolerance Quiz

  • What is the total tolerance for drilled holes in Example A?

+ .010

-.002


Bolt circles

Bolt Circles

  • Three or more holes are positioned around a common center

  • Located angularly on a circular centerline


Bolt circles1

Bolt Circles

  • Dimension of bolt circle appears

    • Inside of diagonal dimension line

    • With abbreviation BC after hole data

    • Holes may be equally spaced

    • Abbreviation EQL SP follows quantity in local note

    • Divide 360 by number of holes

    • One of the holes is on vertical or horizontal centerline


Bolt circles2

Bolt Circles

  • Inside of diagonal dimension line


Bolt circles3

Bolt Circles

  • Inside of diagonal dimension line


Bolt circles4

Bolt Circles

  • With abbreviation BC after hole data-Holes may be equally spaced

  • Abbreviation EQL SP follows quantity in local note


Bolt circles5

Bolt Circles

  • Holes may be located coordinately

  • Use only vertical or horizontal dimensions


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • How thick is the shim?

.020


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • Is the shim symmetrical?

No


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • Are the bolt circles concentric?

Yes


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • How many holes are in the shim?

8


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • What is the tolerance on the .250 Dia. holes?

.005


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • What is the tolerance on the .500 Dia. holes?

.008


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • What is the tolerance on the 1.000 Dia. hole?

.010


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • What is the tolerance on the bolt circles?

.010


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • What is the tolerance on the radii?

.02


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • How much material is between the 5/8” hole and the nearest outside edge?

.1875


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • How far apart angularly are the three .500 Dia. holes?

120°


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • How far apart angularly are a .250 Dia. hole and the nearest .500 Dia. hole?

60°


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • How far apart angularly are a .250 Dia. hole and the farthest .500 Dia. hole?

180°


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • How far apart angularly is the 5/8” hole from the nearest ½” hole?

30°


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

  • What is the angular tolerance for the hole locations?

±0°30’


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

What is the dimension for A?

1.15


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

What is the dimension for B?

1.125


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

What is the dimension for C?

.625


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

What is the dimension for D?

.525


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

Shim

What is the dimension for E?

.275


Maximum least material condition

Maximum & Least Material Condition

  • MMC

  • Feature of size contains the maximum material within assigned tolerances


Maximum least material condition1

Maximum & Least Material Condition

  • For a shaft

    • At MMC when tolerance is added to its size dimension (.760)

    • At LMC when tolerance is subtracted from it size dimension (.740)


Maximum least material condition2

Maximum & Least Material Condition

  • Internal feature-hole-is at MMC when it is at its smallest size

Sizes are exaggerated. NTS-Not To Scale


Maximum least material condition3

Maximum & Least Material Condition

  • Internal feature-hole-is at LMC when it is at its largest size

Sizes are exaggerated. NTS-Not To Scale


Maximum least material condition4

Maximum & Least Material Condition

  • On any part

    • All surfaces are features (they are not measurable-size)

    • For LMC and MMC, the feature must have a size dimension

    • Must be associated with tow opposing elements or two opposed parallel surfaces

    • Must be measurable


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

X


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

1.005

.995


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

3.005

2.995


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

1.30

1.32


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

.349

.339


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

.30

.32


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

.66

.64


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

X


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

X


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

.905

.895


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

1.91

1.89


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

X


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

.258

.248


Blueprint reading for the machine trades sixth edition unit 2 dimensioning systems

.370

.380


Allowance

Allowance

  • Minimum clearance between mating parts

  • Maximum interference between mating parts

  • Calculate by subtracting MMC of shaft from MMC of hole


Allowance1

Allowance

  • When shaft’s MMC is smaller than hole’s MMC-positive allowance-clearance

  • When shaft’s MMC is larger than hole’s MMC-negative allowance-interference


Allowance2

Allowance

  • Positive or negative-allowance is always the tightest possible fit between mating parts


Allowance3

Allowance

Use the formula for calculating allowance:

MMC Hole - MMC Shaft = Allowance


Allowance4

Allowance

MMC Hole=.999

-MMC Shaft A=.998

Allowance=.001 (positive)


Allowance5

Allowance

MMC Hole=.999

-MMC Shaft B=1.004

Allowance=-.005 (negative)


Mmc allowance quiz

What is the MMC of hole “D?”

MMC/Allowance Quiz

.748


Mmc allowance quiz1

What is the MMC of Shaft “C?”

MMC/Allowance Quiz

.745


Mmc allowance quiz2

What is the allowance between “C” and “D?’

MMC/Allowance Quiz

.003


Mmc allowance quiz3

Is the allowance positive or negative?

MMC/Allowance Quiz

Positive


Mmc allowance quiz4

Is it a clearance or interference fit?

MMC/Allowance Quiz

Clearance


Mmc allowance quiz5

What is the MMC of hole “F?”

MMC/Allowance Quiz

.743


Mmc allowance quiz6

What is the MMC of shaft “E?”

MMC/Allowance Quiz

.747


Mmc allowance quiz7

What is the allowance between “E” and “F?”

MMC/Allowance Quiz

-.004


Mmc allowance quiz8

Is the allowance positive or negative?

MMC/Allowance Quiz

Negative


Mmc allowance quiz9

Is it a clearance or interference fit?

MMC/Allowance Quiz

Interference


Mmc allowance quiz10

What is the LMC of hole “D?”

MMC/Allowance Quiz

.752


Mmc allowance quiz11

What is the LMC of Shaft “C?”

MMC/Allowance Quiz

.735


Mmc allowance quiz12

What is the allowance between “C” and “D?’

MMC/Allowance Quiz

.017


Mmc allowance quiz13

Is the allowance positive or negative?

MMC/Allowance Quiz

Positive


Mmc allowance quiz14

Is it a clearance or interference fit?

MMC/Allowance Quiz

Clearance


Mmc allowance quiz15

What is the LMC of hole “F?”

MMC/Allowance Quiz

.745


Mmc allowance quiz16

What is the LMC of shaft “E?”

MMC/Allowance Quiz

.743


Mmc allowance quiz17

What is the allowance between “E” and “F?”

MMC/Allowance Quiz

.002


Mmc allowance quiz18

Is the allowance positive or negative?

MMC/Allowance Quiz

Positive


Mmc allowance quiz19

Is it a clearance or interference fit?

MMC/Allowance Quiz

Clearance


Arcs and circles

Arcs And Circles

  • When an arc is less than a complete circle-dimension it by radius

  • May have a definite center-e.g.. 1.00R & 4.50R in Dwg. 11A004

  • May float-run tangent with other arcs or lines-e.g. .75R same print


Arcs and circles1

Arcs And Circles

  • Radial dimension not used for circles or diameters

  • Radial dimension doubles permit greater variation


Arcs and circles2

Arcs And Circles

  • E.g. 1.000 DIA with .01 yields dimension between .99 and 1.01 DIA

  • .50R with .01 would permit diametric dimensions between .98 and 1.02 DIA


Arcs and circles3

Arcs And Circles


Arcs and circles4

Arcs And Circles

  • Is the print drawn to (a) half-size or (b) twice-size?

(a) half-size


Arcs and circles5

Arcs And Circles

  • What is the thickness of the spacer?

.500


Arcs and circles6

Arcs And Circles

  • Interpret the abbreviation CRS used in the title block?

Cold-Rolled Steel


Arcs and circles7

Arcs And Circles

  • How many holes does the spacer contain?

10


Arcs and circles8

Arcs And Circles

  • Is the spacer symmetrical about the vertical and horizontal centerline?

Vertical


Arcs and circles9

Arcs And Circles

  • What is the angular dimension between each small hole?

60


Arcs and circles10

Arcs And Circles

  • What is the angular dimension between each large hole?

120


Arcs and circles11

Arcs And Circles

  • What tolerance is assigned to the angular spacing of the drilled holes?

 030’


Arcs and circles12

Arcs And Circles

  • What is the tolerance on the bolt circles?

 .01


Arcs and circles13

Arcs And Circles

  • What is the tolerance on the center hole diameter?

 .005


Arcs and circles14

Arcs And Circles

  • What is the MMC of the center hole?

4.995


Arcs and circles15

Arcs And Circles

  • What is the tolerance on the drilled holes?

+.010

-.002


Arcs and circles16

Arcs And Circles

  • What is the MMC of the .688 holes?

.686


Arcs and circles17

Arcs And Circles

  • What is the overall dimension along the horizontal CL?

9.00


Arcs and circles18

Arcs And Circles

  • What is the overall dimension along the vertical CL?

10.50


Arcs and circles19

Arcs And Circles

Enter the dimension for the letter “A.”

.50


Arcs and circles20

Arcs And Circles

Enter the dimension for the letter “B.”

.531


Arcs and circles21

Arcs And Circles

Enter the dimension for the letter “C.”

1.00


Arcs and circles22

Arcs And Circles

Enter the dimension for the letter “D.”

.656


Arcs and circles23

Arcs And Circles

Enter the dimension for the letter “E.”

.687


Arcs and circles24

Arcs And Circles

Enter the dimension for the letter “A.”

.81


Arcs and circles25

Arcs And Circles

Enter the dimension for the letter “B.”

2.32


Arcs and circles26

Arcs And Circles

Enter the dimension for the letter “C.”

.15


Arcs and circles27

Arcs And Circles

Enter the dimension for the letter “D.”

3.28


Arcs and circles28

Arcs And Circles

Enter the dimension for the letter “E.”

7.26


Arcs and circles29

Arcs And Circles

Enter the dimension for the letter “F.”

1.72


Arcs and circles30

Arcs And Circles

Enter the dimension for the letter “G.”

1.58


Arcs and circles31

Arcs And Circles

Enter the dimension for the letter “H.”

.42


Arcs and circles32

Arcs And Circles

Enter the dimension for the letter “I.”

30°


Arcs and circles33

Arcs And Circles

Enter the dimension for the letter “J.”

3.98


Arcs and circles34

Arcs And Circles

Enter the dimension for the letter “K.”

.01


Arcs and circles35

Arcs And Circles

Enter the dimension for the letter “L.”

.20


Arcs and circles36

Arcs And Circles

Enter the dimension for the letter “M.”

.19


Arcs and circles37

Arcs And Circles

Enter the dimension for the letter “N.”

.12


Arcs and circles38

Arcs And Circles

Enter the dimension for the letter “0.”

.30


Arcs and circles39

Arcs And Circles

  • How much material remains between a .250 hole and the outside edge?

.225


Arcs and circles40

Arcs And Circles

  • How much material remains between a .220 hole and the outside edge?

.19


Arcs and circles41

Arcs And Circles

  • Are the .200 holes located in the exact center between ID and OD? (Calculate this.)

No


Arcs and circles42

Arcs And Circles

  • What is the MMC of the center hole?

2.555


Arcs and circles43

Arcs And Circles

  • What is the MMC of the .250 holes?

.248


  • Login