1
00:00:09,208 --> 00:00:11,375
Hello and welcome
 to Heart of Worcestershire College.

2
00:00:11,708 --> 00:00:12,875
I'm Howard. 

3
00:00:13,000 --> 00:00:15,541
What we're doing today
 is the first in a series of something

4
00:00:15,541 --> 00:00:17,291
we like to call toolbox talks. 

5
00:00:17,291 --> 00:00:19,791
Hence the toolbox in front of me now.

6
00:00:20,000 --> 00:00:24,625
Just a brief,  really guide to some of the things
 that we've got here in engineering.

7
00:00:25,000 --> 00:00:27,666
So I'm going to kick it off today
 by introducing you

8
00:00:27,666 --> 00:00:30,500
to the very important Zeus book.

9
00:00:31,458 --> 00:00:33,250
I was told this many, many years ago. 

10
00:00:33,250 --> 00:00:35,583
You can't be an engineer
 without one of these, 

11
00:00:35,583 --> 00:00:37,875
and it's handy
 if you have a pocket to put it in.

12
00:00:38,791 --> 00:00:41,791
I'll go briefly with about the stuff
 that's in here.

13
00:00:42,333 --> 00:00:46,750
I'll just show you my original copy
 now it's probably 40 years old now.

14
00:00:46,750 --> 00:00:51,875
It's well thumbed,  well repaired, but like I said
 we can't be an engineer without one.

15
00:00:52,625 --> 00:00:54,291
So what we have in here 

16
00:00:55,083 --> 00:00:59,250
the first couple of pages
 is pretty much a conversion chart.

17
00:00:59,791 --> 00:01:01,208
Very often in industry, 

18
00:01:01,208 --> 00:01:05,166
we have metric imperial machines
 running alongside each other.

19
00:01:05,333 --> 00:01:08,708
It's always handy as a quick guide
 to go between one or the other.

20
00:01:09,000 --> 00:01:12,708
It really is a drill conversion chart,
 but of course, it can work for anything.

21
00:01:14,041 --> 00:01:15,625
Very useful indeed. 

22
00:01:15,625 --> 00:01:18,291
Now, the next seven or eight pages

23
00:01:18,291 --> 00:01:21,125
here relate to different types of threads

24
00:01:21,541 --> 00:01:23,958
and all the information
 about different types of threads.

25
00:01:24,333 --> 00:01:27,750
Now I'm just going to pick on that one now
 because this this is metric.

26
00:01:28,333 --> 00:01:32,916
A lot of the stuff we do these days
 is metric, and it's a quick, handy guide

27
00:01:33,250 --> 00:01:35,500
to see what size hole we need to drill

28
00:01:35,958 --> 00:01:38,125
if we've got to tap a certain size.

29
00:01:38,708 --> 00:01:41,583
Like I said, metric is probably
 the most common that we do these days,

30
00:01:41,916 --> 00:01:45,750
but there is a selection of imperial here,
 including Whitworth,

31
00:01:46,041 --> 00:01:48,666
BSF, BA, UNF.

32
00:01:48,916 --> 00:01:50,875
All the information is in here. 

33
00:01:52,375 --> 00:01:54,125
So the next page, then, 

34
00:01:54,125 --> 00:01:56,666
is to do with limits and fits.

35
00:01:56,666 --> 00:02:00,666
Now limits and fits
 are to do with the type of fits

36
00:02:00,666 --> 00:02:02,583
where components go together . 

37
00:02:02,583 --> 00:02:04,416
It could be transition fits. 

38
00:02:04,416 --> 00:02:05,500
It could be sliding fits. 

39
00:02:05,500 --> 00:02:07,875
It could be interference fits. 

40
00:02:07,875 --> 00:02:11,666
What you'll get on a drawing
 will be machine this to H8

41
00:02:11,666 --> 00:02:15,833
and we can go in here and find out what
 the tolerances are top and bottom limits.

42
00:02:16,083 --> 00:02:18,625
So we know exactly what our limit
 and fit's going to be.

43
00:02:18,833 --> 00:02:21,000
That information
 will be on an engineering drawing

44
00:02:22,500 --> 00:02:26,916
and the next  couple of pages now we have a hardness
 comparison table.

45
00:02:26,916 --> 00:02:30,166
This is where we check
 how hard a certain material is and there's

46
00:02:30,166 --> 00:02:34,000
various scales on here
 like Vickers, Rockwell, things

47
00:02:34,000 --> 00:02:36,875
like that,
 we can check to see what's what.

48
00:02:38,041 --> 00:02:42,666
The next page is,
 how to work out equally spaced holes.

49
00:02:43,833 --> 00:02:46,875
Easily, the coordinates are in there. 

50
00:02:46,875 --> 00:02:52,750
We have sheet metal  bending allowances, morse tapers,
 the morse tapers are

51
00:02:52,750 --> 00:02:56,791
what the parts that go in the tail
 stock of a center laithe

52
00:02:56,833 --> 00:02:59,625
where the drills go, running
 centers, things like that.

53
00:03:00,416 --> 00:03:02,375
Now, towards the end of the book, 

54
00:03:02,375 --> 00:03:05,833
we have things that I'm sure a lot of us
 would like to forget from school.

55
00:03:05,833 --> 00:03:10,375
We have things like sines and tangents,
 but very important to us engineers.

56
00:03:10,375 --> 00:03:13,000
If we're working out angles, for example.

57
00:03:14,250 --> 00:03:18,458
And the last thing that we have here is the solution of the 
right angle triangle.

58
00:03:19,000 --> 00:03:22,125
Again, if we're engineers, we might
 be asked the machine a particular angle

59
00:03:22,708 --> 00:03:24,791
and we can actually set up using this.

60
00:03:24,791 --> 00:03:26,500
This never changes. 

61
00:03:26,500 --> 00:03:28,083
This thing here 

62
00:03:28,083 --> 00:03:32,250
has been like this since year dot,
 and I'm sure it will continue. OK.

63
00:03:32,625 --> 00:03:34,875
Thanks for watching
 and look out for some more. 

64
00:03:34,875 --> 00:03:36,166
Thank you. Goodbye.