Transcript Insert Book Title Here

Blueprint Reading for the
Machine Trades, Sixth Edition
Unit 11: Metric Drawings
Russ Schultz and Larry Smith
PowerPoint presentation created by
LaVonne Vichlach
1
Metric Drawings





More common today
Shown on the print in a variety of ways
Effort made to use whole or half
millimeters except for standard tools
Metric conversion-multiply by .03937 for
inches
Best to think metric
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
2
Metric Drawings


First to have symbols precede
dimension figures
Both metric and inch systems follow this
organization today
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Reading for the Machine
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Trades, 6th edition
3
Dimensioning Symbols


Major move toward
international
standardization of
symbols
Symbols have
meanings
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4
Metric Threads




System similar to Unified threads
Major diameter is first after prefix “M”
Pitch tolerance class specification
Only two series of thread are standard
in metric system


Coarse
Fine
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Reading for the Machine
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5
Metric Threads

Tolerance Class

Numbers and letters
designate tolerance
for pitch


Major diameters for
external
Minor diameters for
internal
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Reading for the Machine
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6
Metric Threads

Tolerance Class




Letters indicate the
position of thread
tolerance in relation
to basic diameter
“e” is large allowance
“g” is a small
allowance
“h” is no tolerance
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Reading for the Machine
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7
Metric Threads

Tolerance Class




6H/6g are general purpose
Comparable to U.S. 2A/2B classes of fit
May be assumed when omitted from
specifications
4H5H/4h6h similar to U.S. class 3A/3B
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Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
8
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
9
Flanged
Hub
1. Are the units of
measurement in
(a) inches, (b)
millimeters, or
(c) centimeters?
(b)
millimeters
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Reading for the Machine
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Flanged
Hub
2. Is the section
view a (a)
half-section or
a (b) full
section?
(b) full
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Reading for the Machine
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Flanged
Hub
3. What
tolerance
applies to the
flange
diameter?
±1
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Reading for the Machine
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12
Flanged
Hub
4. What is the
MMC of the
bore
diameter?
25.4
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Flanged
Hub
5. Write the
flange
diameter in
limit form.
99 -101
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Reading for the Machine
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14
Flanged
Hub
6. Write the bore
diameter with
bilateral
tolerance.
25.45 ±0.05
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Flanged
Hub
7. Convert the
flange
diameter to its
decimal inch
equivalent.
3.397
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Flanged
Hub
8. What is the
diameter of the
bolt circle?
82.6
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Flanged
Hub
9. What is the
diameter of the
spotface?
19
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Flanged
Hub
10. Does the
spotface run
tangent with
the diameter
of the flange?
No
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19
Flanged
Hub
11. What is the
major
diameter of
the threads?
10
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Flanged
Hub
12. What is the
pitch of the
threads?
1.5
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Flanged
Hub
13. What is the
tolerance
class of the
threads?
6H
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Flanged
Hub
14. Are the
threads
coarse or
fine?
Coarse
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Flanged
Hub
15. How many
full threads
will the
tapped hole
contain?
11
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Reading for the Machine
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Flanged
Hub
Calculate the
dimension for
the letter
A
45°
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Reading for the Machine
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25
Flanged
Hub
Calculate the
dimension for
the letter
B
41
Schultz and Smith: Blueprint
Reading for the Machine
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Trades, 6th edition
26
Flanged
Hub
Calculate the
dimension for
the letter
C
20
Schultz and Smith: Blueprint
Reading for the Machine
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Trades, 6th edition
27
Flanged
Hub
Calculate the
dimension for
the letter
D
8
Schultz and Smith: Blueprint
Reading for the Machine
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28
Flanged
Hub
Calculate the
dimension for
the letter
E
4.25
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Reading for the Machine
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29
Flanged
Hub
Calculate the
dimension for
the letter
F
8.7
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Reading for the Machine
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Trades, 6th edition
30
Flanged
Hub
Calculate the
dimension for
the letter
G
37
Schultz and Smith: Blueprint
Reading for the Machine
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Trades, 6th edition
31
Flanged
Hub
Calculate the
dimension for
the letter
H
6.8
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Reading for the Machine
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32
Flanged
Hub
Calculate the
dimension for
the letter
I MIN
16.75
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Reading for the Machine
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33
Flanged
Hub
Calculate the
dimension for
the letter
J MAX
15.9
Schultz and Smith: Blueprint
Reading for the Machine
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34
Metric
Hole Block
1. What units of
measurement
are used for
dimensioning?
Millimeters
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Reading for the Machine
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35
Metric
Hole Block
2. What do the
parentheses
enclosing some
of the dimensions
designate?
Reference
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
36
Metric
Hole Block
3. Are the holes
located by chain
dimensioning or
datum
dimensioning?
Datum
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Reading for the Machine
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Trades, 6th edition
37
Metric
Hole Block
4. What is the
maximum
tolerance
accumulation
between any two
hole locations?
± 0.4
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
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38
Metric
Hole Block
5. Is the specified
material an alloy
steel or a carbon
steel?
Carbon
Steel
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Reading for the Machine
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Trades, 6th edition
39
Metric
Hole Block
6. Is the specified
material a high-,
medium, or low –
carbon steel?
Low-Carbon
Schultz and Smith: Blueprint
Reading for the Machine
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Trades, 6th edition
40
Metric
Hole Block
7. What tolerance
class is specified
for the threaded
holes?
6H
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
41
Metric
Hole Block
8. What is the
major diameter
of the smallest
threaded hole?
6
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Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
42
Metric
Hole Block
9. Are the M8
threads coarse or
fine?
Coarse
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Reading for the Machine
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Trades, 6th edition
43
Metric
Hole Block
10. What is the
thread pitch
of the blind
hole?
1.5
Schultz and Smith: Blueprint
Reading for the Machine
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Trades, 6th edition
44
Metric
Hole Block
11. What is the
tolerance on the
depth of the tap
drill in the blind
hole?
±1.5
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
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45
Metric
Hole Block
12. What is the
chamfer angle
on the
threaded
holes?
45°
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Reading for the Machine
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46
Metric
Hole Block
13. Calculate the
minimum
number of full
threads possible
in the blind hole.
(disregard
chamfer)
10
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Reading for the Machine
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47
Metric
Hole Block
14. How far apart
are the
countersunk
hole and the
counterbored
hole?
22
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Reading for the Machine
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48
Metric
Hole Block
15. How far apart
are the
spotfaced hole
and the M6
threaded hole?
27
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
49
Metric
Hole Block
16. What is the
diameter of
the spotface?
22
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
50
Metric
Hole Block
17. What is the
approximate
depth of the
spotface?
0.8-1.5
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
51
Metric
Hole Block
18. What is the
diameter of
the
counterbore?
13
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
52
Metric
Hole Block
19. Show the
limits of the
counterbore.
5-8
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
53
Metric
Hole Block
20. What is the
included
angle of the
countersink?
82°
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
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54
BRG
Support
1. What unit of
measurement
was used for
dimensioning?
Millimeter
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Reading for the Machine
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55
BRG
Support
2. Is the part
symmetrical about
its (a) vertical
centerline,
(b)horizontal
centerline, or (c)
both?
(a) vertical
Schultz and Smith: Blueprint
Reading for the Machine
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56
BRG
Support
3. Is the section
view considered
(a) a full section
or (b) a halfsection?
(a) Full Section
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Reading for the Machine
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57
BRG
Support
4. Does the
section view
contain any
rotated
features?
Yes
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Reading for the Machine
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58
BRG
Support
5. Is the partial
view (a) a
projected top
view or (b) a
removed
view?
(a) projected
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Reading for the Machine
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59
BRG
Support
6. What is the
angular
dimension
between
mounting
holes?
120°
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Reading for the Machine
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60
BRG
Support
7. What is the
angular
dimension
between a
mounting hole
and a rib?
60°
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Reading for the Machine
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61
BRG
Support
8. What is the
thickness of
each rib?
10
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Reading for the Machine
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62
BRG
Support
9. What is the
fillet radius
between the
flange and the
ribs?
3
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Reading for the Machine
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BRG
Support
10. What is the
fillet radius
between the
flange and
the hub?
8
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Reading for the Machine
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Trades, 6th edition
64
BRG
Support
11. What is the
tolerance on
the bolt
circle?
±0.5
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Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
65
BRG
Support
12. What is the
major thread
diameter of
the tapped
hole?
10
Schultz and Smith: Blueprint
Reading for the Machine
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66
BRG
Support
13. What is the
pitch of the
threads?
1.5
Schultz and Smith: Blueprint
Reading for the Machine
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67
BRG
Support
14. What tap
drill is
specified?
8.5
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Reading for the Machine
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68
BRG
Support
15. Are the
threads
coarse or
fine?
Coarse
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Reading for the Machine
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69
BRG
Support
16. How many
full threads
will the
tapped hole
contain?
8
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
70
BRG
Support
Calculate the
dimensions for
the letter
A
12
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
71
BRG
Support
Calculate the
dimensions for
the letter
B
4
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
72
BRG
Support
Calculate the
dimensions for
the letter
C
2.75
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
73
BRG
Support
Calculate the
dimensions for
the letter
D
9.75
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
74
BRG
Support
Calculate the
dimensions for
the letter
E
2.5
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
75
BRG
Support
Calculate the
dimensions for
the letter
F
3
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
76
BRG
Support
Calculate the
dimensions for
the letter
G
9
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
77
BRG
Support
Calculate the
dimensions for
the letter
H
6
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
78
BRG
Support
Calculate the
dimensions for
the letter
I
15.75
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Reading for the Machine
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Trades, 6th edition
79
Flanged
Coupler
1. What new
method of
dimensioning
was used to
locate the
holes?
Coordinate
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Reading for the Machine
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Flanged
Coupler
2. Are the hole
locations
controlled by
(a) angular
tolerance or
(b) linear
tolerance?
(b) linear
Schultz and Smith: Blueprint
Reading for the Machine
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Trades, 6th edition
81
Flanged
Coupler
3. Why are the
angular
dimensions
and the bolt
circle
dimension in
parentheses?
Reference
Schultz and Smith: Blueprint
Reading for the Machine
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Trades, 6th edition
82
Flanged
Coupler
4. Are holes one
and three
diametrically
opposed?
No
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Reading for the Machine
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83
Flanged
Coupler
5. What type
of view is
view A?
Partial
Enlarged
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Reading for the Machine
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Flanged
Coupler
6. Is the rightside view
(a) a full
section or
(b) a halfsection?
(a) Full
Section
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Reading for the Machine
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85
Flanged
Coupler
7. What practice
was used to show
the countersunk
hole in the
section view even
though the hole is
not on the vertical
CL?
Rotated
Feature
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Reading for the Machine
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86
Flanged
Coupler
8. Show the
limits of
the flange
diameter.
195.98 196
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Reading for the Machine
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87
Flanged
Coupler
9. Show the
limits of
the flange
thickness.
28.2 - 29
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Reading for the Machine
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88
Flanged
Coupler
10. What is the
total
tolerance on
the bored
hole?
0.013
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Reading for the Machine
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89
Flanged
Coupler
11. What is
the MMC
of the
bored
hole?
50.787
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Reading for the Machine
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90
Flanged
Coupler
12. What is the
MMC of the
88.85
diameter?
88.9
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Reading for the Machine
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Flanged
Coupler
13. What is the
minimum wall
thickness at
the
counterbore?
6.3
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Reading for the Machine
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Trades, 6th edition
92
Flanged
Coupler
14. What is the
maximum wall
thickness
between the
bore and the
76.149
diameter?
12.681
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Reading for the Machine
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Flanged
Coupler
15. Is the
specified
material (a) a
carbon steel
or (b) an
alloy steel?
(b) Alloy
steel
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Reading for the Machine
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94
Flanged
Coupler
16. What does
the note FAO
abbreviate?
Finish All
Over
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Flanged
Coupler
17. What is the
minimum
acceptable
Rockwell
hardness?
RC 60
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Reading for the Machine
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Flanged
Coupler
18. What is the
pitch of the
thread?
2
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Reading for the Machine
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Flanged
Coupler
19. Are the
threads
coarse of
fine?
Coarse
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Reading for the Machine
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98
Flanged
Coupler
20. How many
full threads
will the
tapped hole
contain?
14
Schultz and Smith: Blueprint
Reading for the Machine
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Trades, 6th edition
99
Pivot
Arm
1. What method
of
dimensioning
was used?
Dual
dimensioning
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
10
0
Pivot
Arm
2. What type
of section
view is
shown?
Revolved
Section
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
10
1
Pivot
Arm
3. What is the
metric
tolerance on
a 2-place
decimal inch
dimension?
± 0.5
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
10
2
Pivot
Arm
4. How many
holes are
specified?
7
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
10
3
Pivot
Arm
5. How many flat
finished
surfaces does
the part
contain?
9
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
10
4
Pivot
Arm
6. How much
material
(metric) is
provided for
each machined
surface?
3
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
10
5
Pivot
Arm
7. How much
material (metric)
remains between
a 6.5 hole and
the adjacent
finished surface?
1.25
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
10
6
Pivot
Arm
8. How far
(metric) are
the 13.5 holes
from the 28.5
hole?
65
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
10
7
Pivot
Arm
Calculate the
dimension for
the letter
A
47
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
10
8
Pivot
Arm
Calculate the
dimension for
the letter
B
3.42
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
10
9
Pivot
Arm
Calculate the
dimension for
the letter
C
13
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
11
0
Pivot
Arm
Calculate the
dimension for
the letter
D
1.48
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
11
1
Pivot
Arm
Calculate the
dimension for
the letter
E
11
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
11
2
Pivot
Arm
Calculate the
mm dimension
for the letter
F
21
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
11
3
Pivot
Arm
Calculate the
in. (max)
dimension for
the letter
F
.89
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
11
4
Pivot
Arm
Calculate the
mm dimension
for the letter
G
7.75
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
11
5
Pivot
Arm
Calculate the
in. (min)
dimension for
the letter
G
.293
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
11
6
Pivot
Arm
Calculate the
in. dimension
for the letter
H
.41
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
11
7
Pivot
Arm
Calculate the
mm (max)
dimension for
the letter
H
11.5
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
11
8
Pivot
Arm
Calculate the
mm (min)
dimension for
the letter
H
8.5
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
11
9
Dimension Origin

In some cases…


Designate that a dimension between two
features must originate from one of the
features
One of them is excluded
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
12
0
Dimension Origin




Part has two parallel
surfaces
Unequal length
Must be mounted on
a shorter surface
Dimension origin
designates that
dimension originates
from shorter surface
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
12
1
Dimension Origin
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
12
2
Symbol Quiz
DIAMETER
RADIUS
SPHERICAL DIAMETER
SPHERICAL RADIUS
REFERENCE DIMENSION
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
12
3
Symbol Quiz
DIMENSION NOT-TO-SCALE
NO OF TIMES/PLACES
ARC LENGTH
SQUARE (SHAPE)
DEPTH/DEEP
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
12
4
Symbol Quiz
COUNTERBORE/SPOTFACE
COUNTERSINK
CONICAL TAPER
SLOPE
DIMENSION ORIGIN
METRIC DIMENSION
Schultz and Smith: Blueprint
Reading for the Machine
© 2008 Pearson Education, Upper Saddle River, NJ 07458. All Rights Reserved.
Trades, 6th edition
12
5