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Glass Bead 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.

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.

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.