Abrasive Grade Comparison

FEPA (P-Grade), CAMI (Coated AbrasivesManufacturers Institute, the US standard), NEW (NEW Structured or A-grits), Inches and Microns (Average particle size in inches/microns).

FEPA

CAMI

NEW

INCHES

MICRONS

P1200

    

.00060

15.3
 

600

  

.00062

16.0

P1000

    

.00071

18.3
 

500

  

.00077

19.7
     

.00079

20.0

P800

  

A25

.00085

21.8
 

400

A30

.00092

23.6
     

.00098

25.0

P600

  

A35

.00100

25.75
 

360

  

.00112

28.8
     

.00118

30.0

P500

    

.00119

30.2

P400

  

A45

.00137

35.0
 

320

  

.00140

36.0
     

.00158

40.0

P360

    

.00158

40.5
 

280

  

.00172

44.0
     

.00177

45.0

P320

  

A60

.00180

46.2
     

.00197

50.0

P280

    

.00204

52.5
 

240

A65

.00209

53.5
     

.00217

55.0

P240

  

A75

.00228

58.5
     

.00230

60.0

P220

  

A85

.00254

65.0
 

220

A90

.00257

66.0

P180

180

A110

.00304

78.0
 

150

A130

.00363

93.0

P150

    

.00378

97.0
 

120

A160

.00452

116.0

P120

    

.00495

127.0
 

100

  

.00550

141.0

P100

  

A200

.00608

156.0
 

80

  

.00749

192.0

P80

    

.00768

197.0

P60

    

.01014

260.0
 

60

  

.01045

268.0

P50

    

.01271

326.0
 

50

  

.01369

351.0

P40

    

.01601

412.0
 

40

  

.01669

428.0

P36

    

.02044

524.0
 

36

  

.02087

535.0

P30

    

.02426

622.0
 

30

  

.02488

638.0
 

24

  

.02789

715.0

P24

    

.02886

740.0