Order# |
Code |
Grit |
Average Grain Size
Inches / Microns
|
Description |
39473
39463
39452 |
G
F
E |
80
100
120 |
.015 / 267
.007 / 173
.006 / 142 |
COARSE
Fast removal of metal
for the initial “cut” |
39439
|
D
|
180
|
.0034 / 86
|
MEDIUM
General purpose for controlled metal removal |
39426
39413 |
C
B |
220
240 |
.0026 / 66
.0025 / 63 |
MEDIUM FINE
For cylinder lapping
|
39401
39510 |
A
1A |
280
320 |
.0018 / 44
.0013 / 33 |
FINE
For finishing, valve lapping, bearings dies, and gauges |
39523
39549
|
2A
4A |
400
600 |
.0009 / 23
.0006 / 14 |
VERY FINE
For fine polishing & lapping |
39561
39587 |
5A
7A |
800
1200 |
.00038 / 9
.00012 / 3 |
EXTREMELY FINE
High precision lapping & polishing |