ManSpace Issue 3

Issue 3 (otherwise known as Issue 1, 2012) of ManSpace is out now.  Still a massive $6.95, or $5 for subscribers.  An interesting effect on the cover with selective varnishing to highlight details in the images and text.

I have a couple of articles in the current issue: (there are obviously a lot more articles for you to read from other contributors!) A third article has been held over till next time – there was so much content for the current one there just wasn’t the space!

Circle Work: Professing my dislike of a popular power tool, and demonstrating 6 different ways I cut circles in the workshop (excluding handtools, and drilling holes!), whether that be cutting a round disc, or cutting a round hole.

True Grit: which looks at the whole question of abrasives and just how they fit together – sandpaper, waterstones, diamond paste etc – they are all abrasive, and we know to work through the grits but what happens if you don’t have ten different grades of diamond stone?  To complement the article, the following table is what I use to compare abrasive systems.  I have taken a few minor liberties with the numbers, but then no table I have seen seems to totally agree with another anyway.  The other thing you will notice is my table is the only one I have found that places diamond stones in their correct location, and I’ve included some common items to give an idea just how fine some abrasives are.

Waterstones

Description

CAMI (USA)

ISO/FEPA (Europe)

JIS (Japan)

Mesh

Average functional particle size in microns (µm)

P20

18

1000 (1mm)

Beach Sand

28

700

40

P40

425

P60

269

Fine Sand

60

250

P80

201

80

190

P100

162

100

150

100

140

P120

120

125

120

115

P150

100 (0.1mm)

180

P180

82

Portland Cement

200

74

220

P220

68

P240

59

P280/F230

52

P320

46

Silt

325

44

P360

41

120 µm Diamond Whetstone Extra-Extra Coarse

40

Plant Pollen

400

37

320

F280

360

36

P400

35

400

32

400

F360

23

P800

600

22

60 µm Diamond Whetstone Extra Coarse

500

20

P1000

18

600

800

16

45 µm Diamond Whetstone Coarse

P1200

15

1000

14

800

P1500

13

Red Blood Cell

(1200)

12

1200

11

1000

P2000

10 (0.001mm)

25 µm Diamond Whetstone Fine

P2500

2000

8

9 µm Diamond Whetstone Extra Fine

F1200

4000

3

Cigarette smoke

F1500

6000

(4800)

2

3 µm Diamond Whetstone Extra-Extra Fine

F2000

8000

1 (0.0001mm)

P – Coated abrasives
F – Bonded abrasives

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