Inland Lapidary Translate this page
lapidary resources and dealers
Inland Lapidary Cabochon Contest
how to make cabochons
edelstein
Sign up for eNews

NEW ARRIVALS
Gift Certificates
Flat Lap Machines
Flat Lap Disks
Lapidary Saws
Saw Blades & Accessories
Shaper / Grinder
Diamond Drums
SwapTop Accessories
Tools & Supplies
Plated Diamond Wheels
Sintered Diamond Wheels
Sintered Faceting Laps
Sintered Carving Burs
Wire Drills / Plated Burs
Plated Core Drills
Brazed Core Drills
Jewelry Boxes
Soldering Products
3M Micropolishing Films
Diamond Pacific
Graves Faceting
Estwing Picks & Pans
MSRP List-US
MSRP List-EU
ISO9001:2008
Shopping Cart
Privacy Policy
Conditions of Use
California Prop 65
Sitemap
Cart Contains 0 Items
Total: $0.00

If you are looking for the diamond tools and equipment that Inland Craft makes for the stained glass hobby, click on the logo below.

If you are looking for the tools and equipment that Inland Craft makes for the RC, Model Railroad, Scale Modeling, and other small scale hobbies, click on the logo below.

 

Site Powered By:

2014
Diamond Grit Size Designations,  Approximate Particle Sizes, and Counts

The diamond grit designations for diamond lapidary tools actually represent a range of diamond particle sizes used to manufacture that given designation. For example a 150 grit diamond wheel is actually a 140/170 grit wheel made up of diamond crystals ranging in size from 105-88 microns or .004-.0036 inches in diameter.

Inland lists grit size for all their diamond products by the standard US convention of labeling after the larger size diamond. For example, an Inland 60 grit diamond wheel is made from diamond grit size 60/ 80 range. If you are used to seeing a single number grit size, all you need to do is find the range which that grit falls into and then use the lower number of that range for the comparable Inland diamond product.

USA Grit
Size
(mesh)
Inland
Equivalent
Size - Microns
(range or average mean)
Size - Inches
(range or average)
Number Particles in One Carat (approx) Comparable 
to these Grits
mesh is the number of wires per inch in a screen mesh listed grit on Inland diamond products 1 micron =
3.93700787 10-05 inches
1 inch =
25, 400 microns
1 carat = 0.2 grams
1 gram = 5 carats
commonly found grit sizes in lapidary wheels & drums
8/10   2380-2000 .093-.075 4.2-7        
10/12   2000-1680 .075-.066 7-12  
12/14   1680-1410 .066-.055 12-20  
14/16   1410-1190 .055-.047 20-33  
16/18   1190-1000 .047-.039 33-57  
18/20   1000-840 .039-.033 57-97  
20/25   840-710 .033-.028 97-160  
25/30   710-590 .028-.023 160-282  
30/35  30 grit 590-500 .023-.019 282-460 30 G

R

 I

N

D

 I

N

G

 

35/40   500-420 .019-.016 460-770  
40/45   420-350 .016-.014 770-1,334  
45/50   350-297 .014-.012 1,334-2,080  
50/60   297-250 .012-.010 2,080-3,240  
60/80 60 grit 250-177 .010-.007 3,240-10,400 60
80/100 80 grit 177-149 .007-.006 10,400-17-140 80
100/120 100 grit 149-125 .006-.005 17,140-20,920 100
120/140 120 grit 125-105 .005-.004 20,920-49,400  
140/170 140 grit 105-88 .004-.0035 49,400-82,400   
170/200 170 grit 88-74 .0035-.0029 82,400-140,000 180
200/230 200 grit 74-62 .0029-.0024 140,000-252,000 220
230/270   62-53 .0024-.0021 252,000-384,000 260
270/325  270 grit 53-45 .0021-.0018 384,000-660,000 275
325/400  325 grit 45-37 .0018-.0015 660,000-1,120,000 360
400/500   37-35 .0015-.0014 1,120,000-1,192,800   L

A

P

P

 I

N

G

500/600   35-30 .0014-.0012 1,192,800-2,046,000  
600/700 600 grit 30-29 .0012-.0011 ~2,046,000-2,418,850 600
700/800   29-25 .0011-.0010 ~2,418,850-9,503,000  
900 18.5 .00073 ~1.18106
1000 16.5 .00065 ~1.32107
1100 14.5 .00057 ~1.32107
1200 1200 grit 18-12 .00071-.00047 ~1.696107 1200
1400 10.5 .00041 ~1.696107  
1500 9.5 .00037 ~1.39 108
1800   12-8 .00047-.00031 ~1.696107 - 2.62108   P

O

L

I

S

H

I

N

G

2200   10-6 .00039-.00024 ~7.86107  
3000 3000 grit 8-4 .00031-.00016 ~2.62108 3000
5000 4.5 .00018 ~8.82108
6000 6-2 .00024-.00008 ~8.82108  
8000   4-2 .00016-.00008 ~2.05109  
12000   3-1 .00012-.00004 ~2.05109 - 6.21010  
13000 1.25 .00005 ~ 6.21010
14000 1.0 .00004 6.21010
15000   2-0 .00008-0 average of 6.21010  
25000 1-0 .00004-0 6.21010 - 0
28000 0.5 .00002 ~ 3.11010
60000   1-.25 410-5-9.840-6 ~ 6.21010