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Glass Bead Blasting Conversion Chart

Glass beads used in abrasive blasting cabinets come in different sizes just like sandpaper comes in different sizes and grades. 60-100 mesh is the fastest cleaning size, and cleaning time increases as bead size increases or decreases.  This means that using a No. 7 or No. 8 will strip surfaces most quickly.

The larger the bead size the lower the maximum impact velocity. A good rule of thumb is 80 psi maximum blasting pressure for siphon and 40 psi for direct pressure using a pressure pot assembly.Under normal use, glass beads can usually be recycled up to 30 times.

All Media Blast bead blasting cabinets use glass beads. For Industrial applications look to the Media Blast N-200, N-200 Cyclone, PowerPeen and Power Strip models. We offer additional information related to:

(Chart is for reference only. Please consult glass bead manufacturers for exact specifications.)

U.S.
STANDARD
SCREEN SIZE
MIL. SPEC.
(PRF-9954D)
MIL. SPEC.
(S-13165B)
COMMON BRANDS SAE
(J-1173)
BEAD SIZE RANGE
(DIA., INCHES)
FLEX-O-LITE
(BLAST-O-LITE)
POTTERS
(BALLOTINI)
CATAPHOTE
(MICROBEAD)
ZERO
12-14 No. 1   BT 1 1   801-201   .0661-.0555
14-20 No. 2
BT 2 2
801-202
.0555-.0331
20-30 No. 3 331 BT 3 3 or A MS-XGX 801-203 GB-70 .0331-.0234
20-80


AA


.0331-.0070
25-35   280     MS-XPX     .0283-.0197
25-45


AAA MS-XP

.0283-.0171
30-40 No. 4 232 BT 4 4 or B
801-204 GB-50 .0234-.0165
35-45
197




.0197-.0171
35-60         MS-P     .0197-.0098
40-50 No. 5 165 BT 5 5
801-205 GB-35 .0165-.0117
40-60     BOL 21 C

  .0165-.0098
40-70



MS-XHX

.0165-.0083
45-60   138           .0171-.0098
50-70 No. 6 117 BT 6 6 or D
801-206 GB-25 .0117-.0083
50-80     BOL 23 AB MS-XH     .0117-.0070
60-80 No. 7 98 BT 7 7 or E
801-207 GB-20 .0098-.0070
60-100     BOL 24   MS-H     .0098-.0059
60-120


AC


.0098-.0049
70-100 No. 8 83 BT 8 8 or F   801-208 GB-18 .0083-.0059
70-140

BOL 25 AD MS-MH

.0083-.0041
80-120 No. 9 70 BT 9 9 or G   801-209 GB-15 .0070-.0049
100-140


H


.0059-.0041
100-170 No. 10   BT 10 10 or AE   801-210   .0059-.0035
100-200

BOL 26
MS-M

.0059-.0029
120-170       AG       .0049-.0035
120-200 No. 11
BT 11 11
801-211
.0049-.0029
140-200       J       .0041-.0029
140-230 No. 12
BT 12 12
801-212
.0041-.0025
140-270     BOL 27   MS-ML     .0041-.0021
170-230


K


.0035-.0025
170-325 No. 13   BT 13 13 or AH MS-L 801-213   .0035-.0017
170 and Finer


AL


.0035 and Finer
200-270       N       .0029-.0021
200-325

BOL 29



.0029-.0017
230-325   24   O       .0025-.0017
270-400


P


.0021-.0015
270 and Finer       AI MS-XL     .0021 and Finer
325 and Finer

BOL 30 AQ MS-XLX 801-214
.0017 and Finer
400 and Finer       AS       .0015 and Finer

Bold Print indicates the most commonly used glass bead sizes. Mil. Spec. No. 8 is the most commonly used bead size.