Section 10: Basic and common symbols recognition
PURPOSE
This section aims to enable the student to extend their knowledge of Drawing
Interpretation from Engineering Drawings produced to AS1100 standard.
Objectives
At the end of this section you should be able to:
o
Interpret information on detail drawings of engineering components.
Completion guidance
Students should attempt this section if the material relates to the engineering discipline
they are employed or intend to be employed in.
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MEC076 - 10 - 1
I
Basic and Common Symbols.
Recognition.
The symbols covered in on the following pages are an example of the widespread use of
symbols and abbreviations in industry. The symbols and abbreviations covered in this module
relate to a few trades and professions. In some areas there are so many symbols and
abbreviations that only someone who is heavily involved would know them all. If you do not
know what a symbol means, do not guess, because in some industries it could lead to a
serious injury or death if a wrong interpretation or decision is made. If you do not know what a
symbol means, make sure you ask someone who definitely knows, not someone who does not
like to admit that they do not know. You do not want the guess of someone else, you want
someone who definitely knows or someone who has the latest publication containing the
symbols.
1126.50
I
Feature
identification
A
Datum
identification
R8
Radius
135
R
R12
Equal
.015
Diameter
D
~
First angle
projection
.08
Square
1:-·;·-:1
~D65
Third angle
-C-----}
projection
-8:-1:4
Taper
t::::". 1: 3.5
Slope
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[ MEC076 - 10 - 2
I
Adding the roughness value to a standard symbol
Surface textures
Surface texture
II
Surface texture refers to the roughness of a surface. It can vary from very rough to very
smooth, for example an aluminium casting may have the following surface textures:
II
rough cast
II
fine cast
II
die cast
II
rough machined
II
medium machined
II
fine machined
.
..
If a particular surface finish is required, but the production technique is not
important, this symbol should be used:
\y
If a particular surface finish is required by using a machining operation, this symbol
would be used:
7'
When a surface finish is needed on a surface where no material can be removed, this
symbol would be used:
~
V
Standard symbols
V
Basic symbol: used when surface finish can be produced by any convenient technique.
~
Modified symbol: finish done by a machining process.
\!
Modified symbol: indicating a surface finish without removal of material (for example,
quality of an initial casting).
Roughness value chart
-:>'"3:_ >,:;<
'
A""",",L
\'//'
50
Rough oxy cut
25
Rough casting
12.5
Rough machining
6.3
Course machining
3.2
Average machining
1.6
Good machining
0.8
Fine machining
0.4
Fine grinding
0.2
Honing
0.1
Buffing
0.05
Polishing
0.025
Super polishing
These numbers will become more relevant when the user is more conversant with the finishes
they represent. Ask your teacher to supply samples of various finishes to a certain
roughness value.
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[ MEC076 - 10 - 3 [
Variations to standard symbols
4
3
2
DO NOT SCALE
3.2
g:!/
~~/
V
These symbols show maximum and minimum
roughness values.
V
A
A
_-t----+~M"-1'-"2 " 1.75
o
May be added to a drawing in a note form or
inserted into the title block. This one is used
when all the surfaces are to be machined to
the same surface texture.
#
8
B
51.... 1ED
~
0
----""'-l-----lfl-I-
Jj
_
-+~-- _W I
_
,-,--+-r--- - - -
B
M20 x 2.5
c
c
Y///////l~
Indicates that an allowance of 3mm is to be
provided for final machining.
R15
o
Location of symbols on a drawing
7
I
,,"
~ L..lL.i...1!"_ _ _ _-J._____ ,--------- -----;
ID
I .016
May be added to a drawing in a note form or
inserted into the title block, when a single
surface texture value applies to most
surfaces. Exceptions should be indicated on
the surfaces concerned.
ALL OVER EXCEPT
WHERE OTHERWISE
60
I I
Special surface characteristics are shown
here.
•
20
Section A-A
o
Symbols may be located on an outline, projection line or leader line, provided that they can be
'Md from th, bototom 0' d,ht h""~
th
'
dca"'f-~_g._ _ _ _ _~
!------I._ .
~
Correct
MEC076 Engineering Drawing Interpretation 1
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December, 1998
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E
.024
r-..
---_':':-_---
6
LJ.035 ;j; 2
E
"\
-
Olmen!Slons In mllllmetres
Fillet radii R3 min
Threads to AS 1275
Vle:w on arrow B
-
SAMPLE DRAWING SHOWING
SURFACE FINISH SYMBOLS
~"\
"\
Incorrect
hfUJ
134
MEC076 - 10 -
41
Basic Symbols for Arc and Gas Welding
Reference code
1. Symbols for Welding No AS 26
2. Standards Association of Australia code for welding in building No AS 1554 Part 1
Butt welds
General butt
Full penetration butt weld by a
welding procedure to be agreed
z
Square butt
II
Single V butt
v
\
\
c/;
h
Flush
Convex
Single bevel
butt
v
Concave
Single U butt
Single J butt
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MEC076 - 10 -
51
Structural Steel Profiles and Welding Symbols
The purpose of this page is to introduce you to some other symbols and abbreviations that
are quite common on engineering drawings. Structural steel profiles are not drawn in most
cases, nor are welds drawn or sketched as shown on the next page.
These are only a few of the total number of symbol and abbreviations available in each area,
and are produced here to make you aware of what area of engineering the symbols and
abbreviations belong to.
D[I
Depth greater
than width.
Universal beam
D[I
Universal column
UB
UC
Depth slightly
greater than width.
Universal bearing pile
Channel
D[I
Depth slightly
less than width.
D[[
UBP
[
--I BI--
Angle
equal and unequal
MEC076 Engineering Drawing Interpretation 1
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December, 1998
D:B:.t
--IBI--
L
200 UB 25
where
200 = D (nominal)
25
= mass in Kg/m
Square hollow
section or
rectangular hollow
section
200 UC52
where
200 = D (nominal)
52
= mass in Kg/m
Circular hollow
section
250 UBP 62
where
250 = D(nominal)
62
= mass Kg/m
Round bar or rod
102 x 51 x 10 [
where
102 = D
51
= B
10
= mass Kg/m
127x 75 x10
where
127 = D
75
= B
10
= t
D[Gt
~
dIG--t
d
L
I
•
DIll
SHS
or
RHS
150 x 150 x 5 SHS
150 x 75 x 5 RHS
where
150 = D
75
= B
5
= t
CHS
75 ODx5 CHS
where
75
= outside diameter 'd'
5
= t
RD
L
Square bar
Flat
a)bar or
b)plate
(plate 900 to 3200
in 100mm
increments)
L
fi lUI
136
JBL
rll
W
SQ
a)FL
b)PL
or
FL
20RD
where
2
=
d
20SQ
where
20
=
DorB
150 x 8 FL
where
150 = W
8
= t
1 MEC076 - 10 - 61
Sample of Welding Symbols as They Would Appear on a Drawing
[7
10
•
10_
•
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1 MEC076 - 10 - 71
Standard abbreviations Refer to AS 1100 for the full I
H
A
across flats
addendum
approximate
arrangement
assembly
automatic
auxiliary
average
AF
ADD
APPROX
ARRGT
ASSY
AUTO
AUX
AVG
B
bearing
bottom
bracket
brass
building
BRG
BOT
BRKT
BRS
BLDG
countersink
countersunk head
cross-recess head
cup head
cylinder
detail
diagonal
diagram
diameter
dimension
distance
drawing
inside diameter
internal
ID
INT
hexagon
hexagon head
hexagon-socket head
D
dedendum
high strength
high-tensile steel
horizontal
HD
HT
HEX
HEX HD
HEX SOC HD
HS
HTS
HORIZ
head
height
CSK
CSKHD
C REC HD
CUPHD
CYL
DED
DET
DIAG
DIAG
DIA
DIM
DIST
DRW/DRG
modulus of inertia
J
jOint
junction
JT
JUNC
E
C
capacity
cast iron
cast steel
centre line
centre-to-centre, centres
chamfer
channel
cheese head
chrome plated
circle
circular hollow section
circumference
cold-rolled, steel
computer-aided design and
drafting
computer-aided
manufacture
concentric
counterbore
MEC076 Engineering Drawing Interpretation 1
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December, 1998
elevation
external
CAP
CI
CS
CL
CRS
CHAM
CHNL
CH HD
CP
CIRC
CHS
CIRC
CRS
galvanise
galvanised iron
galvanised iron-pipe
general arrangement
CAD
general-purpose outlet
geometric reference frame
CAM
CONC
CBORE
L
ELEV
EXT
least material condition
left hand
length
longitudinal
F
figure
fillister head
flange
flat
FIG
FILL HD
FLG
FL
M
machine
malleable iron
material
maximum
maximum material
condition
mechanical
mild steel
G
grade
grid
LMC
LH
LG
LONG
GALV
GI
GIP
GA
GPO
GRF
GR
GD
minimum
modification
modulus of elasticity
modulus of section
k"~J
138
MACH or MIC
MI
MATL
MAX
mounting
mushroom head
MIG
MUSH HD
N
negative
nominal
nominal size
not to scale
number
NEG
NOM
NS
NTS
NO
P
parallel
PAR
part
pattern
PT
pipe
pipeline
pitch-circle diameter
phosphor bronze
plate
position
positive
prefabricated
pressure
pressure angle
PATT
P
PL
PCD
PH BRZ
pi
POSN
POS
PREFAB
PRESS
PA
Q
quantity
QTY
R
MMC
MECH
MS
MIN
MOD
E
Z
radius
raised countersunk head
rectangular
rectangular hollow section
reference
regardless of feature size
required
right hand
RAD
RSDCSK HD
RECT
RHS
REF
RFS
REQD
RH
1MEC076 - 10 - 81
Rockwell hardness A
Rockwell hardness B
Rockwell hardness C
rolled-hollow section
rolled-steel angle
rolled-sted channd
rolled-steel jOist
roughness value
round
round head
S
schedule
section
sheet
sketch
spherical
spigot
spotface
spring steel
square
square hollow section
stainless steel (corrosion
resistance sted)
standard
Standards Association of
Australia
steel
switch
MEC076 Engineering Drawing Interpretation 1
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December. 1998
HRA
HRB
HRC
RHS
RSA
RSC
RSJ
Ra
RD
RDHD
SCHED
SECT
SH
SK
SfHER
SPI
SF
SfRSIL
sa
SHS
I
tangent point
temperature
thread
true position
true profile
If
IEMf
IHD
iOL
If
If
U
undercut
universal beam
universal column
UCUI
UB
UC
tolerance
V
vertical
volume
VERI
VOL
W
wrought iron
WI
Y
yidd point
Yf
CRES
SID
SAA
SI
SW
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[ MEC076 -10 - 9 [
Isometric and Oblique Dimensioning
Exercise 10-1
(not recommended for use in engineering)
Exercise: Dimension the isometric drawing from the sizes shown on the orthogonal views.
1.
2.
Projection lines are drawn:•
•
Parallel to the plane
Up or down for the length and width
•
Out to the side for the height
•
Away from the object.
~[
I
I
020
I
a
I
N
Alternate extensions are drawn out to the left or to the right at 30°.
1.
3.
Dimensions may be placed on the view if they are clear.
4.
Dimension figures are drawn parallel to the projection lines and face the reader.
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
64
IS)
t---
.1
a
t<)
~
II
[
L-!~-L________~__~~__J
32
025
120
Wrong
MEC076 Engineering Drawing Interpretation 1
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MEC076 - 10 - 10
Section 11:
Interpretation of drawings/typical
assessment questions
PURPOSE
In this section you will consolidate the material covered in sections 1-10
Objectives
At the end of this section you should be able to:
o
IdentifY components, assemblies or objects.
o
Explain instructions written on a drawing.
o
Interpret information on detail drawings.
o
Interpret information on assembly drawings.
Completion guidance
The work may need to be completed inside and outside the classroom if the majority of
exercises are attempted.
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Interpretation/Sample assessments
Interpretation/Sample assessment questions
What feature of a component is indicated by the following symbols?
Completion guidance: select and attempt suitable questions.
In a title block there is a little box with letters SHT (sheet number). What would be the
advantage of printing '3 of 7' instead of just 3 in the box?
What is achieved by the notation 'ALL DIMENSIONS IN MILLIMETRES' in the title block?
In a title block there is a little box with the heading 'size' in it. If 'A3' is printed in this box,
what information is being given?
The drawing you are looking at has A2 in the size box. The drawing you are looking at is
not an A2 size sheet. How could this have happened?
Why are the tolerances applied to dimensions instead of making every component to the
design size?
What is one purpose for the use of a materials or parts list on a drawing?
The 'scale' box has the notation 1:2 in it. What information is being indicated here?
What purpose is achieved by having numbers equally spaced along the top and bottom
edge of a drawing sheet and letters on each end of the sheet?
The 'scale' box has the notation 5:1 in it. What information is being indicated here?
What is the preferred projection angle for engineering drawings?
A linear tolerance is printed as ± O.5mm UNO. What do the letters UNO stand for?
Sketch the symbol for third angle projection.
What purpose is achieved by using different line thicknesses as well as broken lines on the
drawing?
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Interpretation/Sample assessments
Identify the different line types indicated on the following drawing. They are either an
outline, hidden outline, centre line, extension line, dimension line, break line or leader line.
Which of tHe following methods of drawing presentation show all true shapes? Exploded,
Isometric, Oblique, Orthogonal or Perspective.
Column
152x76xl8C
Which method of drawing tends to show each component as a complete unit and at the
same time makes the finished article easy to assemble?
12
Which method of drawing gives the closest likeness to what the eye would actually see if
looking at an object, especially a large one?
rrunion mount6
for nomlnal.0115
cylinder -----I---ltt-tl-~~
4 holt:5,13'1:3 for
M12 x 1.75 Hex Ha
bo/t5 (~.Iv.) - - - - l h .
Isometric, oblique and perspective drawings are usually single view representations of an
object. What is the least number of views that are possible with orthogonal drawings?
4OOx10x500
mount. {
100
5
500
I
<t
What is one advantage that oblique views have over isometric views?
ComerA---'
Cylinder
I
4
3
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1
7
2
8
3
9
4
10
5
11
6
12
Interpretation/Sample asse56ments
What do the following symbols and abbreviations mean'?
What is one advantage that orthogonal drawings have over pictorial drawings'?
0
Why is it necessary to be very familiar with both first and third angle projection'?
R
fCD
([
What part of a component is considered to be the front view'?
fL
AF
TYf
Name the following three types of drawing presentation. Choose from orthogonal,
oblique, isometric, perspective, exploded.
(758)
~
D
Hex
56
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Interpretation/Sample assessments
What is an auxiliary dimension?
What is meant by a grid system on a drawing sheet?
Give one advantage obtained from the practice of everyone working to the same drawing
standards?
Give the thickness of the following line types. (Thick or thin).
If you had a drawing with '1 of 8' printed in the SHT (sheet) box, how many sheets would
need to make up a complete set of drawings for that particular project?
•
Hidden outline.
•
Centre line.
•
Dimension line .
•
Outline.
The drawing on the following page is dimensioned by using what is called chain
Name the two projection symbols below.
dimensioning ..
Complete the dimensioning of the component (by showing the missing sizes) using datum
dimensioning.
How is a reference dimension shown on a drawing?
If a dimension is underlined, what does it mean?
What needs to be checked if using a drawing that has been in the workshop for a
considerable time, to manufacture a part?
What is one function of a materials list?
MEC076 Engineering Drawing Interpretation 1
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Interpretation/Sample assessments
)
20
10
15
10
What type of drawing is the one shown below?
(Assembly, sub-assembly, detail assembly or detail.)
15
-<7-
/
I
v-
2 holes 08
6
- -
- -
- -1- )-------["7-_
5
\Q
2
0
N
10
15
y-
5Alu minium PL
20
Chain dimensioning
A
:
3
55
30
4
•
I
"I
.1
2)Oles08
-<7-
/
I
0
LO
7
2
6
5
1
4
V
3
2
ITEM
2
2
2
1
QIY
CAP
HANDLE
WDY
LEG
97-505
PI"
SIDE PLATE
97.-504
STEM
97-502
97-507
97-506
97-505
DESCRIPTION
97-503
DRG No
LO
~
t<)
What type of tolerancing would be applied to a component if it had a box of information
like the one shown here or similar to it?
5 aluminium PL
B
I11I
Datum dimensioning
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I
A
I
-----------------------------------
Interpretation/Sample assessments
What information is indicated by the following symbols?
What type of drawing is shown below? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __
3Jt
What is indicated by the note '46mm was 50mm at C/5' on a drawing?
Below are two pictorial drawings, 'A' and 'B'.
What type of drawing is at A? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __
What type of drawing is at B? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __
l!l
;::::
N
2
a
a
N
10
4
B (enlarged)
+
+
a
a
A
t<)
560
a
l!l
7
6
<!l
1063
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Interpretation/Sample assessments
You are asked to make a component to drawing number ego (2468/3 issue G).
How would you know that the drawing you have been given is the correct drawing?
On a separate sheet and using the orthogonal views given below produce an isometric
drawing or cabinet oblique drawing. Complete either a freehand sketch or a drawing using
equipment. Name the pictorial shape as isometric or oblique.
On a separate sheet, draw a third angle orthogonal drawing of the following component.
There are to be three views; a front view 'A', a top view 'B', and a right side view 'C'.
Draw or sketch full size and fully dimension.
Take your dimensions, to the nearest mm, from the drawing below.
50
30
'I - ,
"[
B
I
a
• - -1- ,
I"
25
I
I
I
I
t<J
~I
RJ 16 HOLE 10 1"
~c
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Interpretation/Sample assessments
Answer the questions related to drawing: 993367
How long is the thread?
What type of view is A-A?
Why is the dimension 263 underlined?
What is the name for the diagonal lines in view A-A?
What scale is this item drawn to?
Why do some sizes have a number both above and below the dimension line?
What do you call the feature 2 x 45°.
What is the name given to the line A-A in the front view?
The steps in the shaft have an engineering name. What is it?
What does the symbol (N) indicate?
What is the overall length of the part?
What size sheet was this originally drawn on?
What will be the maximum length of the left end of the shaft?
Why is the 380 dimension in brackets?
What material is specified?
What is the symbol at location AS called?
What is the general linear tolerance?
What size of thread is required?
How many sheets make up a full set of drawings?
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Interpretation/Sample assessments
What issue is this drawing'?
What is the drawing number'?
What are the initials of the drafter'?
What angle of projection is indicated'?
The drawing is missing 8 similar items of information regarding the sizes for the part.
What similar items are missing'? .
What does NTS mean'? (Section A-A)
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Interpretation/Sample assessments
,
I
1
I
2
4
3
I
5
6
DO NOT SCALE
A
A
..I.
z
116.0
115.5
80.5
79.5
-
50.5
49.5
·vt
124.0
123.0
I
-
~~~J
.....
46
L
A~
B
~.~
08 Grind
all over
220.0
219.5
179.5
178.5
Section A-A
(NTS)
B
I
I
eI
-- ---
-
------
-----
----------
--
r---
I
I
1~2X45O
I
I
A~
c
-
c
263
(380)
-
,...-
UNLESS NOTED OTHERWISE
TOLERANCES ARE:
0
LINEAR
±0.1
UNO
@-E3MATERIAL
MILD STEEL
20-8-97
A
FIRST ISSUED
ISSUE
DATE
ZONE
JD
CHANGE
ECN
BY
AMENDMENTS
1
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December, 1998
I
2
I
WL
CKD
ANGULAR N/A
DRAWING PRACTICE
AS 1100
DRAWN
JD
TRACED
WP
CHECKED
WL
ArPRCNED
KA
ISSUED
20-8-97
~
MANUFACTURING AND ENGINEERING
EDUCATIONAL SERVICES CONSORTIA
0
TITLE
SHAFT
RECORD OF ISSUE
FINISH
A
AGNOTED
4
3
i"151it:a
I I I
I I I
I
I
SCALE
1:2
SIZE IDRG W
A3
5
I SHT
40F7
993367
I
6
Interpretation/Sample assessments
Answer the questions related to drawings 124 sheet 1 and 2 of 2
Drawing 124 sheet 2 of 2
What type of drawing is this?
(Assembly, detail assembly, detail, pictorial)
Drawing 124 sheet 1 of 2
What type of drawing is this?
(Assembly, detail assembly, detail, pictorial)
What is the latest issue?
What date was issue A released on?
How many washers (Item 5) are required for each assembly?
What are the initials of the drafter?
What do the numbers inside circles with a leader pointing to a part represent?
Grind
O.4r"
meanf
In zone A1 what does fI
a)/ _ _ _ __
Was the drawing made to scale?
b) 0.4 _ _ _ _ _ _ _ _ c) Grind _ _ _ _ _ __
Some information relating to Item 1 in the notes is given twice (repeated). Is this good
practice?
How many parts make up one full assembly?
Zones D3 and B5 have letters AS in them. What does AS stand for?
What drawing number would you need to obtain to manufacture Item 6?
What material is Items 2, 3, 5, 6, 7, and 8 made from? Give the full description.
What units are the dimensions in?
If Item 4 was to be made from HSS, what would the full description be?
What item number does Item 3 screw onto?
Zone B11tem 3 has thin lines at 45° across it. What are these lines called?
What is the purpose of Item 7?
What is the maximum & minimum of size 13 on Item 2 in zone B3? _ _ _ _ _ _ _ __
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Interpretation/Sample asse55ment5
Page 153
Interpretation/Sample assessments
1
I
I
2
4
3
I
5
6
ALL DIMENSIONS ARE IN MILLIMEIRES
DO Nor SCALE
A
A
300
I--
I
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1
1
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B
r-_-L-=-
-
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9
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r-ASSEMBLY
124 SHT 2 ITEM 9
"
BLOCK
1
124 SHT 2 ITEM 8
"
NUT
1
124 SHT 2 ITEM 7
6
NUT - TRAVERSE LOCKING
3
124 SHT 2 ITEM 6
S
WASHER
3
124 SHT 2 ITEM 5
4
SCRIBER
2
124 SHT 2 ITEM 4
3
NUT
2
124 SHT 2 ITEM 3
2
LEG
2
124 SHT 2 ITEM 2
1
BEAM
1
124 SHT 2 ITEM 1
l'"-LJ:
ITEM
UNLESS NOTED OTHERWISE
TOLERANCES ARE:
D
LINEAR
NfA
-@--E3--
ECN
JR
BY
AMENDMENTS
I
2
I
WC ANGULAR
CKD
DRAWING PRACTICE
AS 1100
3
DRAWN
JR
TRACED
--
DESCRIf'lION
C
FINISH
A
NfA
4
REF DRWG No
MAfERIAL
TilLE
APPROVED TC
ISSUED 20 -12 - 97
RECORD OF ISSUE
NlA
No OFF
-
MANUFACTURING AND ENGINEERING
EDUCATIONAL SERVICES DIVISION
.II
CHECKED WC
MATERIAL
NlA
22/12/97 ZONE ORIGINAL IS5UE
DATE
ZONE
CHANGE
1
1
I
7
A
ISSUE
SCREW
ADJUSTING
I
I
I
I
TRAMMEL
SCALE
Nrs
SIZE DRG N°
A3
5
I 1SHT
OF 2
124
I
6
D
Page 154
Interpretation/Sample assessments
I
1
I
2
3
a
DO NOr SCALE
-II
III
35
300 A~_ _ _ _ _ _--;
I!l
1 04
I'V
Gri:"
151' I"
"I
:L
(see note 4&7)
06
f:\
\2/
BEAM - 1 OFF
MATL: SILVER SrEEL
03.2
4.5
drilllJlJ:~~~~=fj
-~
--
ttf
---'-..--->>j/F
60° inside & -
B
03.5
outside taper
o
~
±o.t
I'
-.J
- M6 x 1.0
6
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in
8--=11:--EF-lf--:I
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t
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NUT-20FF
MATL:M.S.
lr--t-~~~i====J_-L---___ll
Rl
--
-F - -
- -
/ '
06
M3 x 0.5 x 6 deep
(1 leg only)
-
12
E
:;:
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-012
'-06 ream
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-
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@
o
+
see note 7
~~1I5
~_:+
_=t.___ _
+
I
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-~-I- ~
.1 I.
ADJUSTING BLOCK -1 OFF
MATL:M.S.
j-
®
l<l
5 ±0.1
WASHER -3 OFF
MATL: M.s.
•rn;-Rl-:l~'<'l-.----1.
,'----
f'6\
TOLERANCES TO BE WlTHIN ±O.s UNLESS SHOWN OTHERWlSE.
4
SURFACE FINISH GENERAL TO BE
2
I
ITEM 1TO BE A "SLIDE FIT' IN ITEMS 5 & 8. THIS CAN BE
c
ADJUSTING SCREW
BLOCK
NUT
NUT - TRAVERSE LOCKING
WASHER
SCRIBER
NUT
LEG
BEAM
..
..
1
1
1
3
3
2
2
2
1
35 x .03.5 M.S. BAR
35 x.012 M.S. BAR
4x.014 M.S.
12 x.016 M.S.
12 O.D. x 8.5 !.D. x 1.5 M.S.
.03 H.S.S. OR SILVER STEEL
15 x.012 M.S.
90 x .012 M.S.
300 x.06 SILVER STEEL BAR
JD
AND ENGINEERING
1=~~__~~~llTE."M
;I_D:ESC_R_I~_IO_N__MANUFACIURING
~~~Q~TY~~~~~M:A~TE~R~IA~L~~
____-4 0
WP
EDUCArlONAL SERVICES DIVISION
MATERIAL
AS LISTED
3
DO NOT SCALE OFF DRAWlNG - WORK TO DIMENSIONS.
7
,.!'RAWN
TRACED
0
I
6
9
8
7
6
5
4
3
2
1
suit5mm
slitting saw)
r - - - - + - - - - - 1 - - - 1 - - - - - - - - - - - - - - - + - - + - - I - - I U N L E S S NOTED OTHERWISE
1 - - - - + - - - - 1 - - - 1 - - - - - - - - - - - - - - - + - - + - - 1 - - 1 TOLERANCES ARE:
1
x 45 0
both sides
(to
A
15 - 5 - 97
ISSUED FOR PRODUCTION
J D W L ANGULAR ± 0 15'
I-'S_S_U_E-'--'.D"-A"'TE=---=ZO"'N-=E:.L_____---=C:.:..H:.:..A:.:..N=-G=-E_ _ _ _ _ _L-.::EC:::N~L..::B:":'Y-L,:C::K:.:::.-DI
DRAWING PRACTICE
AMENDMENrS
AS 1100
~
REMOVE ALL SHARP CORNERS WlTH A SMOOTH FILE.
THE BEAM WlTH FINE EMERY TO SUIT A 06 REAMED HOLE.
NUT rRAVERSE LOCKING - 3 OFF
±0.5 UNO
-
'0/'
PRODUCED BY REAMING TO SUIT THE 06 BEAM. OR BY BUFFING
0.75
Fine knurl--'1
B
ADJUSTING NUT -1 OFF
MATL: M.S.
3
BEARING SURFACES (ITEM 1) TO BE
\::y MATL: M.s.
~-_+---_l_--_l_-------------~--~--+-~LlNEAR
(I)
spherical
5
I
I
-M8 x 1.25
L Fine knurl
R6
-M8x1.25
.:
-M3xO.5
0.75x45°
Fine knurl
NOTES
1 UNLESS SHOWN OTHERWlSE DIMENSIONS IN MILLIMETRES.
2 ALL M.S. TO BE PER A.S. 1442-1973/S1020.
-M8x1.25
0.75x45 0
..
I--
Rl
see note 7
012
. f
iF
:
,JI \ ~06ream
MATL M S
:
-
~-
II~.
til
P .- ~
~}- -
04.5±0.1
(';;\2 LEG - 2 OFF
I
30
(ref)
M6 x 10-
Fine knurl
-_-1---4.,"'7 ±0.1
15 min
L ~f
03ream----;--]
x 15 deep
2 slots
thru
0.5
x7deep
90
A
~13:...::±0=-.::.1~:-=-2 ±O.l
12 min
max
,6mln
SCRIBER - 2 OFF
MATL:03 H.S.S. OR SILVER SrEEL
HARDEN AND rEM PER
M3 x 0.5
both ends
15
9
/0.75 x 45°
ADJUSTING SCREW -1 OFF
MATL: M.S.
®
15
06.5·
05 ±0.1-
:1
22
-U-+----&=h
~-f-------'~--------~
A
6
5
4
FINISH
SEE NOrES
~C::.:H::.:EC::.:K::.:ED~-y::WuL~~rlrLE
APPROVED
J RP
ISSUED 15 - 5 - 97
RECORD OF ISSUE
TRAMMEL DETAILS
~A~-+--IIf-+--lSCALE
I
4
1:2
SIZE DRG N°
A3
5
SHr
124
1 20F 2
6
Answer the questions below related to drawing 02-MF1-MY98
When was this drawing issued?
What do you call the diagonal lines in Section A-A?
What is the name of the component?
How many pieces are used to make this item?
What size is the oil hole?
What sizes of welds are used?
How many holes have to be drilled .0121'
How thick is item 21'
What is the overall height of the finished item?
What are the overall dimensions of item 11'
What is indicated by the projection symbol at position D4 in the Title Block?
What material is specified?
What is the name given to dimensions like .0441'
What are the general tolerances?
What do you call the symbol marked B?
What does UNO mean?
What welding is specified by the symbol marked A?
What issue is this drawing?
How far is the oil hole from the edge of the cylinder?
What distance are the.012 holes in from the two edges?
Longedge ____________________
MEC076 Engineering Drawing Interpretation 1
Resource Package
December, 1998
• " iI j
155
Sho~edge
____________________
Interpretation/Sample assessments
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2
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NOTE:
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A
All welds 6 fillet unless indicated otherwise
@--E f-~:-;E-ND
UNLESS NOTED OTHERWISE
TOLERANCES ARE:
LINEAR: ± O.S
D
ANGULAR: ± 0 0
A
ISSUE
7/3/98
DATE
fir5t issue
ZONE
CHANGE
ECN
LZ
BB
BY
CKD
AMENDMENTS
1
MEC076 Engineering Drawing Interpretation 1
Resource Package
December, 1998
I
6
4 holes 1012
:I ''I'' , :I
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:~-1'- \
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rr--ti-I hLy-...,
A
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103 oil hole
4
3
2
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---=LZ'---_ _ "
M.S.
FINISH
DRAWING PRACTICE
AS 1100
UNO
3
i"
it J
156
ROUND BAR
1025x6
MS
4
MINOR WEBS
70x8x56
MS
3
ROUND BAR
1060x80
MS
2
MAIN WEB
200x8x135
MS
1
BASE PLATE
200x10x120
MS
ITEM
DESCRIPTION
MATL
SIZE
MANUFACTURING AND ENGINEERING
EDUCATIONAL SERVICES CONSORTIA
D
)-C_HE_C_KE_D_J_B_ _--JTITLE
MATER'AL:
30'
;1"1"
5
12~
APPROVED BB
ISSUED
7 - 3 - 98
RECORD OF ISSUE
I-'A-+-I---l--l--I SCALE
1:2
4
SHAFT SUPPORT BEARING
I
SIZE DRG N°
A3
5
02 - MF 1 - MY 98
I
I
1SHT
OF 1
6
Interpretation/Sample assessments
Answer the questions related to drawing: A671-3
What diameter hole is required in the mounting bracket?
What type of material is used to manufacture the scrubber?
What are the dimensions of the scrubber cylinder, item D?
diameter ____________ length ___________________
How many mounting brackets are required?
What size mild steel angle is used to fabricate the diameter 0800 ID (inside diameter)
flange?
What thickness of material is used to manufacture the mounting brackets?
Why is the drawing classed as a detail assembly?
What type of weld is used to weld the mounting brackets on to the scrubber body?
What issue is the draWing?
Item H refers to the 200 OD (outside diameter) cylinder. What is its length?
What scale is used?
Item F is:'a square to round transition. What are the following dimensions?
bottom diameter _ _ _ _ _ _ _ _ _ __
topsquaro _ _ _ _ _ _ _ _ ___
What type of weld is used to join the transition item F to the spigot item E?
What after-weld treatment is given to the inside of the vessel?
What surface treatment is given to the completed assembly?
MEC076 Engineering Drawing Interpretation 1
Resource Package
December, 1998
, ,'iI)
157
Interpret;ation/Sample assessments
I
1
I
2
3
2300
00 200
5
4
6
DO NOT SCALE
1000
700
300
600
A
"\, I )1---------------------I~'
-------"-= ' ",
~
~-IE8-~--:::.11
A
typ
RIGHT HAND SIDE VIEW
" ...
"
/
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_--------.. ------- __________
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2
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. /KI/\
f--=-,--=10,---,----0-=-
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25
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50 x 50 x 6 M.S, an91e
.1
150
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B
10-4-95 A3 300WAS290
A
10 - 3 - 93
ISSUED FOR PRODUCTION
ISSUE
DATE
ZONE
CHANGE
147/95
JD
JD
ECN
BY
AMENDMENTS
1
MEC076 Engineering Drawing Interpretation 1
Resource Package
December, 1998
I
2
I
I
f--
?50 O.I?
1
4O~0.D
c
~
I,
Details:
I--
1. material 3 mild steel plate. (UNO)
'-
-;:;
2. completed assembly to be hot dipped galvanised.
3. all seams either metallic arc or MIG welded and
6
ground flush on the inside of the vessel.
D 1 - - - 1 - - - - 1 - - - 1 - - - - - - - - - - - - - - + - - - + - - 1 - - 1 UNLESS NOTED OTHERWISE
LINEAR
=--r
:...
DETAIL UN
Mounting bracket 4 required
1-_-1_ _ _-1-_-1-_ _ _ _ _ _ _ _ _ _ _ _-+_ _-+_-1-_ TOLERANCES
-=.1
Alternate traneition
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IA
J=i
(150) 50
'-<----.018
-r
-q
a
;
1
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.04000D
~t ~\"'"
Detail uB"
Typ 1I
,
03000D
150
B
r--I-----l-~
'--
c
2
-==rI
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FRONT VIEW
a
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.-.---""'~"" -.-
A
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-
,
ARE:
±0.5
KA
ANGULAR 0.5 0
WL
CKD
DRAWING PRACTICE
A51100
ri\ d
W-.:...:::..r
MATERIAL
~DRAWN~JD_III ~
TRACED
FINISH
3
KA
ISSUED
10 - 3 - 83
RECORD OF ISSUE
I
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I.YI
4
i or' i! 'II
158
. . ,,' ,
f.:C::.H:::EC=K:::ED~____1CWUL~_I TITLE
APPROVED
AS LISTED
WP
I
B
I
SCALE
1:10
;I
::n
MANUFACTURING AND ENGINEERING
FDllr.ATIONAL SERVICES c()NSORTIA
D
AIR POLLUTION CONTROL SYSTEM
SCRUBBER DETAIL ASSEMBLY
I S~~lDRGN"
5
A671-3
I
SHT
30F8
6
Interpretation/Sample assessments
Answer the questions relating to the diagram
The diagram shown is an architectural diagram. They have another common name. What
is it'?
r----- ---------------------- - - --.,
What is the purpose of an architectural diagram'?
:I
CQo
I
What do the dashed lines inside the various rooms represent'? ( - - - - - - )
I
®
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I
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How many ceiling lights are required,? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __
I
What does the symbol I MSB
I Represent'? _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __
I
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1
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How many ceiling fans are required,?
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T,
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What additional information would you require to work out what minimum length of wiring
you would need to take'?
What does this symbol represent'?
.fr __________________
How many single power points are required,? __________________
MEC076 Engineering Drawing Interpretation 1
Resource Package
December, 1998
", iI:a
159
Interpretation/Sample assessments