h70-h50 technical data
Stone Code Explanation Chart & Surface Finish Guide
| H70-H50 |
A |
5 |
7 |
| SERIES |
ABRASIVE TYPE |
GRIT SIZE |
HARDNESS |
|
| Abrasive Types |
| A - ALUMINUM OXIDE |
| C, J - SILICON CARBIDE |
| DM, DR, DV - DIAMOND |
| NM, NR - CBN |
| R25 - RUBY A/O |
| QT25 - CUBITRON |
| WA - PURE A/O |
|
| Grit Size |
| 1- |
70 |
8- |
400 |
| 2- |
80 |
9- |
500 |
| 3- |
100 |
0- |
600 |
| 4- |
150 |
80- |
800 |
| 5- |
220 |
90- |
900 |
| 6- |
280 |
10- |
1000 |
| 7- |
320 |
00- |
1200 |
|
| Hardness |
| 1- |
SOFT |
| 3- |
|
| 5- |
|
| 7- |
|
| 9- |
|
| 11- |
|
| 13- |
|
| 15- |
HARD |
|
Note: For special abrasive needs, contact your Tennessee Abrasive Technical Support Team.
| Approximate Surface Finish in Micrometers (μm) Ra |
| Material |
Abrasive Type |
Grit Size |
| 80 |
100 |
150 |
220 |
280 |
320 |
400 |
500 |
600 |
1200 |
| Hard Steel |
Aluminum Oxide/Silicon Carbide |
0,65 |
- |
0,50 |
0,45 |
0,30 |
0,25 |
0,12 |
0,08 |
0,03 |
|
| CBN |
- |
1,40*2,00 |
1,15 |
1,00 |
0,70 |
- |
0,50 |
- |
0,18 |
0,05 |
| Soft Steel |
Aluminum Oxide/Silicon Carbide |
2,00 |
- |
0,90*1,40 |
0,65 |
0,50*0,90 |
0,40 |
0,18*0,25 |
0,10*0,20 |
0,05 |
|
| CBN |
- |
1,60*2,50 |
- |
1,25*2,00 |
- |
- |
0,65 |
- |
0,40 |
0,12 |
| Cast Iron |
Silicon Carbide |
2,50 |
- |
0,75*1,00 |
0,50 |
0,30 |
0,25 |
0,15 |
0,12 |
0,08 |
|
| Diamond |
- |
- |
- |
2,00 |
- |
- |
1,27 |
- |
0,50 |
0,30 |
| Aluminum, Brass, Bronze |
Silicon Carbide |
4,30 |
- |
2,00 |
1,40 |
0,85 |
0,70 |
0,40 |
0,30 |
0,05 |
|
| Carbide |
Diamond |
- |
- |
0,75 |
0,50 |
- |
- |
0,18 |
- |
0,08 |
0,03 |
| Ceramic |
Diamond |
- |
- |
1,27 |
1,00 |
- |
- |
0,50 |
- |
0,40 |
0,25 |
| Glass |
Diamond |
- |
- |
2,40 |
1,80 |
- |
- |
0,75 |
- |
0,40 |
0,20 |
Surface Finish Conversions: Millimeter to Inch - To convert one unit of measure to the other use the following formulas. Micrometer to microinch: Micrometer x 40 = Microinch
Formulas for determining minimum stock removal required on diameter to achieve desired surface finish. Surface Finish in Micrometers - (μm) Ra
Existing Finish - Desired Finish
100,000 |
= |
Required
Stock Removal |
Example: Existing Finish = 50 μm"; Desired Finish = 10 μm"
50 - 10
100,000 |
= |
0.0004 inch |
| Approximate Surface Finish in Microinches (μ in) Ra |
| Material |
Abrasive Type |
Grit Size |
| 80 |
100 |
150 |
220 |
280 |
320 |
400 |
500 |
600 |
1200 |
| Hard Steel |
Aluminum Oxide/Silicon Carbide |
25 |
- |
20 |
18 |
12 |
10 |
5 |
3 |
1 |
|
| CBN |
- |
55*80 |
45 |
40 |
28 |
- |
20 |
- |
7 |
2 |
| Soft Steel |
Aluminum Oxide/Silicon Carbide |
80 |
- |
35*55 |
25 |
20*35 |
16 |
7*10 |
4*8 |
2 |
|
| CBN |
- |
65*100 |
- |
50*80 |
- |
- |
25 |
- |
16 |
5 |
| Cast Iron |
Silicon Carbide |
100 |
- |
30*40 |
20 |
12 |
10 |
6 |
5 |
3 |
|
| Diamond |
- |
- |
- |
80 |
- |
- |
50 |
- |
20 |
12 |
| Aluminum, Brass, Bronze |
Silicon Carbide |
170 |
- |
80 |
55 |
33 |
27 |
16 |
12 |
2 |
|
| Carbide |
Diamond |
- |
- |
30 |
20 |
- |
- |
7 |
- |
3 |
1 |
| Ceramic |
Diamond |
- |
- |
50 |
40 |
- |
- |
20 |
- |
15 |
10 |
| Glass |
Diamond |
- |
- |
95 |
70 |
- |
- |
30 |
- |
15 |
8 |
Surface Finish Conversions: Inch to Millimeter - To convert one unit of measure to the other use the following formulas. Microinch to micrometer: Microinch ÷ 40 = Micrometer
*If two values are shown: the first number is for the small parts, honed on machines with one horsepower or less; the second number is for large parts, honed on machines with two or more horsepower
Formulas for determining minimum stock removal required on diameter to achieve desired surface finish. Surface Finish in Microinches - (μ") Ra
Existing Finish - Desired Finish
100,000 |
= |
Required
Stock Removal |
Example: Existing Finish = 50 μm"; Desired Finish = 10 μm"
50 - 10
100,000 |
= |
0.0004 inch |