evenfallstudios.com

Home | Store | Search | Blog | Articles | Reference | Library | Reviews | Contact Us

Follow Us on Twitter!   Follow Us on Pinterest!   Follow Us on YouTube!   Subscribe To Our Blog via RSS!

---> Subscribe to our Newsletter <---

Home -> Reference -> Grit Size Comparisons

Abrasive Grit Size Comparisons

Evenfall Studios - Tooling, Fixtures and Jigs for Hand and Power Tool Woodworking

~ Artisan Made Tooling, Fixtures and Jigs
for Hand and Power Tool Woodworking ~

Handcrafted in Northern California USA • We Ship Internationally

~~~~~~~~~~~~~


A comparison of  grit sizes of belts, wheels,
stones and hones.

Of Note: Exact comparisons between all the different abrasives cannot be made.

Different standards are used for abrasive sizing, the ranges of limits,
and the distribution of sizes within those limits.

240 grit is the demarkation point for determining larger size by sieving, and smaller, by sedimentation.
Both ANSI standards have a 240 grit.

European "P" sizes are for coated abrasives;
"F" sizes are for bonded abrasives.

Description
Belts and wheels
Waterstones
Average grit size in microns

CAMI (USA)
FEPA (Europe)
JIS
(Japan)

12


1842


P12

1764
*American National Standards Institute B74.12.
12*


1575

16
P16

1322

16*


1118


P20

984

20*


940

20


905

24*


686


P24

740

24


715

30


638


P30

622

30*


556

36


535


P36

524

40


428


P40

412

50


351


P50

326

60


268


P60

260


P80

195

80


192


P100

156
Coarse Crystolon
100

150
141


P120

127

120


116
100 micron belt


100


P150

97
Medium Crystolon, coarse India
150


93
80 Micron belt


80

180
P180

78
3M 74 micron diamond stone


74


P220

65
60 Micron belt, extra coarse diamond hone
220


60


P240
240
58
Medium India, fine Crystolon
240
F230, P280

53



280
50


P320

46
Coarse Diamond
325
F240

45
Fine India
280

320
43
3M 40 micron diamond stone & belt
"400"
P360

40
Medium diamond
320
F280
360
36
35 Micron belt
P400

35



400
32
30 Micron belt
P500

30
Washita
360
F320

29


P600

25.8
Fine Diamond
600


25

400
F360

23
22 Micron belt
P800
600
22
Soft Arkansas, 20 Micron belt,
3M 20 micron stone
"800", 500


20
18 Micron belt
P1000

18


F400

17

600

800
16
15 Micron belt, 15 micron SiC paper
P1200

15
Hard white Arkansas, extra fine diamond, and medium ceramic
700

1000
14


P1500

12.6
12 micron belt
800


12



1200
11
Queer Creek Blue Ohio Sandstone
600 - 1000


9-16


P2000

10.3
3M 10 micron diamond stone
"1800"


10

1000
F600
1500
9.2
Extra-fine diamond hone
"1200"


9
Hard black Arkansas, 9 micron belt
1000


9


P2500

8.4



2000
7.5

1200
F800

6.5
6 Micron belt


6
5 micron SiC paper
F1000

5
Extra fine white Ceramic, green chrome rouge, 3 Micron belt, Tormek compound*
1500
F1200
4000
3


F1500
6000
2
Japanese Waterstone
F2000
8000
1.2
1 Micron belt, Linde C compound
2000


1
Chromium oxide polishing compound,
0.5 micron Chromium oxide paper



0.5
There is another chart of fine abrasive equivalents at http://www.gemsociety.org/info/chmesh.htm



Crystolon is Norton Abrasives tm for Silicon Carbide stones
India is Norton Abrasives tm for Aluminum Oxide stones
Raybrite and Linde compounds are aluminum oxide powders
* Tormek compound contains a variety of grains of various size, the smallest down to 0.7 micron. The average effective size is 3 micron.

Scotch-Brite Abrasive Belt Equivalent Grits

3M is not consistent in their use of color for a particular grit. This chart is based on Scotch-Brite surface finishing belt data.

Grade
Equivalent abrasive grit
Color
Abrasive Material
Finish (micro-inches)
Aluminum
Stainless Steel
Coarse
80 - 150
Brown
Aluminum Oxide
130 - 150
62 - 72
Medium
150 - 180
Maroon
Aluminum Oxide
80 - 100
32 - 40
Fine
180 - 220
Green?
Aluminum Oxide
50 - 70*
15 - 25*
Very fine
220 - 320
Blue
Aluminum Oxide
16 - 35
6 - 12
Super fine
320 - 600
Gray
Silicon Carbide
8 - 12
4 - 6
*Estimated. Scotch-Brite is a tm of 3M Corp.

Scotch-Brite Hand Pads
Grit Designation
Color
Equivalent Grit
Abrasive
Extra Coarse
Brown

Aluminum Oxide
Coarse
Tan

Aluminum Oxide
Medium
White, Gray or Maroon

Aluminum Oxide
Fine
Light Gray or Green
150 - 180
Aluminum Oxide
Very Fine
Maroon
220 - 280
Aluminum Oxide
Extra Fine
Gray
320 - 400
Silicon Carbide
Ultra Fine
White
600 - 800
Talc

BearTex (Norton) Hand Pads in Order of Aggressiveness
Grit Designation
Color
Abrasive
Product code
Very Fine
Maroon
Aluminum Oxide
777
Very Fine
Maroon
Aluminum Oxide
747
Very Fine
Green
Aluminum Oxide
796
Very Fine
Gray
Silicon Carbide
851
Ultra Fine
Gray
Silicon Carbide
635
Micro Fine
Gray
Silicon Carbide
748
Non-abrasive
White
None
456

3M Trizact Abrasive grades
(This abrasive is arranged in pyramids, and they claim 2 to 4 times longer life.)
(Average mineral size in microns)
FEPA P-grade equivalents
6
P2500
16
P1200
20

30

40

45
P400
60

65
P280
80

90
P220
100

110
P180
160
P120


This chart updated and adapted for use at evenfallstudios.com by Rob Hanson.
Orignal work performed by Steve Bottorff

~~~~~~~~~~

Fine Woodworking Tools, Fixtures and Jigs that help make woodworking
Faster, Easier and More Accurate. Please visit our Store
to see our full product line of woodworking and sharpening tools!

~~~~~~~~~~

"We enjoy making tools, and work to do our best,
because we want our tools to translate fine craftsmanship
transparently through the artisan, so they can create their best work, their vision."

~ Rob Hanson, Evenfall Studios ~

~~~~~~~~~~~~~

If you find these references helpful,
would you please consider helping support?

~~~~~~~~~~~~~

Thank you for visiting us!

Ordering Policies | Shipping Policies | Terms and Conditions | Privacy Policy | Copyright Statement | Sitemap | Contact Us


Evenfall Studios - Tooling, Fixtures and Jigs for Hand and Power Tool Woodworking

Copyright 1993 - evenfallstudios.com. All Rights Reserved.

We Accept Visa, Mastercard, Amex, Discover and PayPal