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Bonded abrasives – product information

Information about the disc type


A – Product description

1. Letter: grit type
A = aluminium oxide
C = silicon carbide
ZA = zirconia alumina / aluminium oxide

2. Number: grit size according to standard
FEPA 42-1:2006
16–24 = coarse
30–60 = medium
80–100 = fine

3. Letter: hardness
K–P = soft
Q–S = medium
T–X = hard

4. Letter: bonding
B = synthetic resin
F = fibre reinforcement

5. Number: disc format
41 = straight cutting disc
42 = depressed centre cutting disc
27 = depressed centre grinding disc
29 = semi-flexible grinding disc

B – Dimensions

Diameter x thickness x hole size in millimetres and inches

C – Colour coding by material

D – Part number

E – Identification marking for free of iron, sulphur and chlorine (< 0.1 %)

F – Maximum speeds

The maximum permitted working speeds according to EN 12413 in m/s and rpm:

Diameter, speed at 80 m/s:
76 mm / 3"" = 20 100 rpm
100 mm / 4"" = 15 300 rpm
115 mm / 4.5"" = 13 300 rpm
125 mm / 5"" = 12 250 rpm
150 mm / 6 "" = 10 200 rpm
180 mm / 7"" = 8 500 rpm
230 mm / 9"" = 6 650 rpm
300 mm / 12"" = 5 100 rpm
350 mm / 14"" = 4 400 rpm
400 mm / 16"" = 3 850 rpm

Diameter, speed at 100 m/s:
76 mm / 3"" = 25 100 rpm
100 mm / 4"" = 19 100 rpm
115 mm / 4.5"" = 16 650 rpm
125 mm / 5"" = 15 300 rpm
150 mm / 6 "" = 12 700 rpm
180 mm / 7"" = 10 650 rpm
230 mm / 9"" = 8 350 rpm
300 mm / 12"" = 6 400 rpm
350 mm / 14"" = 5 500 rpm
400 mm / 16"" = 4 800 rpm

G – Expiration date

Use-by date:
date of production + 3 years

"V" = expiration date
01 = 1st quarter
04 = 2nd quarter
07 = 3rd quarter
10 = 4th quarter

3. = year of production

H – Safety recommendations

I – Identification of applicable standards

EN 12413
European standard

ANSI B7.1:2000
American National Standards Institute

oSa
Organisation for the Safety of Abrasives