National Diamond Laboratory
Manufacturers of Fine Diamond Tooling

4650 Alger Street
Los Angeles, Ca 90039 - Yahoo Map
  


Call Toll Free: 800-898-8665  Local: 818-240-5770 FAX: 818-545-8820    EMAIL
  Catalog Index Page | Diamond & CBN Wheel Index |  DIAMOND PARTICLE COUNT-DIAMOND POWDERS       Print Page


Related Information: HOW TO ORDER DIAMOND & CBN WHEELS | WHEEL OPERATION AND APPLICATION 

APPROXIMATE PARTICLE COUNT AND SIZE DIAMOND POWDERS
MESH (GRIT SIZE)
DIAMETER
OF ABRASIVE PARTICLE
NUMBER OF PARTICLES
IN ONE CARAT
NORMAL FINISH PRODUCED
BY WHEEL OF THIS GRIT SIZE
60
70
80

100
120
140

170
200
230

270
325
400
.010"
.008"
.007"

.006"
.005"
.004"

.0035"
.003"
.0024"

.002"
.0017"
.0015"
3,240
6,140
10,400

17,140
20,920
49,400

83,400
140,000
252,000

384,000
660,000
1,120,000
35-50 micro in. RMS
25-35 micro in. RMS
20-30 micro in. RMS

16-24 micro in. RMS
14-20 micro in. RMS
12-17 micro in. RMS

10-15 micro in. RMS
8 -12 micro in. RMS
7 -11 micro in. RMS

6 -10 micro in. RMS
5 - 9 micro in. RMS
4 - 8 micro in. RMS

NATIONAL DIAMOND LABORATORY WHEELS
ARE MANUFACTURED TO THE FOLLOWING DIAMOND CONTENT SPECIFICATIONS:
 
DIAMOND WHEEL CONCENTRATION
DIAMOND CONTENT
25
18 carats per cubic inch
50
36 carats per cubic inch
75
54 carats per cubic inch
100
72 carats per cubic inch

NATIONAL DIAMOND LABORATORY GUARANTEES THAT IN THE MANUFACTURE OF OUR
DIAMOND WHEELS NOT LESS THAN THE ABOVE CONCENTRATION HAS BEEN USED.


MATERIALS FOR CORES OF RESIN BONDED WHEELS

A frequent problem in the manufacture of RESIN BONDED DIAMOND WHEELS is bond failure between the cutting rim and the wheel body.  This sometimes becomes evident at the end of the molding stage, but more frequently, after curing the wheel.   Problems of this type are more likely to arise when the composition of the cutting rim and wheel body are substantially different in nature.   As a consequence, resin aluminum bodies is preferable due to the compatibility of the resins.

In wet or dry grinding applications the resin aluminum body is recommended to dissipate the heat buildup more readily than the bakelite body wheels.  The heat is absorbed back into the wheel instead of transferred on to the material being ground, causing what is commonly known as "HEAT CHECKING"? of the workpiece.  This heat dissipation will also enhance the diamond bond strength allowing for a longer lasting wheel and less likely to burn the diamond section.   Over the years, resin aluminum bodies have been developed to enhance properties such as dimensional stability, cross-breaking and impact strength.


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